Measuring Value Block

(1)

_{Safety precautions}

Observe following if test and measuring

instruments are required during a test drive:

_{Test and measuring instruments must be}

secured to rear seat and operated by a 2nd person from this location.

_{If test and measuring instruments are operated} from front passenger's seat and the vehicle is involved in an accident, there is a possibility that the person sitting in this seat may receive

serious injuries when the airbag is triggered.

02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(2)

_{Read Measuring Value Block}

(function 08)

_{VAG1551 scan tool with VAG1551/3B}

cable

Test conditions

_{Coolant temperature must be at least}

80 C, display group 04, display zone 3.

_{All electrical consumers, e.g. lights and}

rear window heating must be switched off

_{If the vehicle is equipped with an air}

conditioner, this must be switched off.

_{On vehicles with automatic transmission}

selector lever in "P" or "N" position

_{No DTCs must be stored in DTC memory}

(3)

Work sequence

_{- Connect VAG1551 scan tool (VAG1552). Start}

engine and select "Address word" 01 of engine control module. Engine must be running at idling speed. (Connecting scan tool and selecting engine control module Page 01-12 .)

Rapid data transfer HELP Select function XX

Indicated on display:

- Press keys 0 and 8 for function "Read

Measuring Value Block" and confirm entry with Q key.

Read Measuring Value Block HELP Input display group number XXX

Note:

The display group number 1 is an example, to illustrate the sequence.

- Select required display group number.

- Press keys 0, 0 and 1 for "Display group number 1" and confirm entry with Q key.

Read Measuring Value Block 1

1 2 3 4

Indicated on display: (1 to 4 Display zones)

(4)

Note:

To change to another display group proceed as

follows:

_{Display group VAG1551} _VAG1552

Higher Press key 3 Press key Lower Press key 1 Press key Skip Press key C Press key C _{- If specifications in all display zones are}

obtained, press key.

Rapid data transfer HELP Select function XX

Note:

Measured value blocks which are not described in this chapter are currently only intended for the research and development and production. The values displayed are not relevant for service department troubleshooting.

- Press keys 0 and 6 for "End data transfer" function and confirm input with Q key.

(5)

Measuring value blocks, evaluating display groups 0 to 9 (Basic functions)

Display group 1 (Basic functions)

Engine running at idling speed Read Measuring Value

Block 1 display Indicated on

xxxx

RPM xx.x C

x.x% xxxxxxxx

1 2 3 4 Display zones Specification Evaluation Adjustment conditions

for basic setting 1x111111 Page 01-170 Oxygen sensor regulator before

catalyst -10.0 to 10.0% Page 01-198

Coolant temperature 80 to 110 C Page

01-177 Engine speed (idling speed):

Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(6)

Significance of 8-digit number block for readiness code Significance if display = 1 1 2 3 4 5 6 7 8 Significance

1 Coolant temperature above 80 C 1 Speed below 2000 RPM

1 Throttle valve closed

1 Oxygen sensor control OK. 1 Idling switch closed

1 Air conditioner compressor switched off 1 CAT-Temp. over 350 C

(7)

Evaluating display group 1, display zone 1 - Engine speed (idling speed) Appears on

display Possible cause Corrective action

Less than 640 RPM or 700 RPM

Throttle valve control module sticking or

faulty - Check throttle valve control module Page 24-44

_{- Perform idling check}

Page 24-95 More than

760 RPM or 820 RPM

Idling switch not closed/faulty - Check DTC Memory Page 01-21

Large amount of unmetered air (cannot be compensated for by the idling

stabilization)

- Check intake air system for leaks Page 24-92

Throttle valve control module

sticking/faulty - Check throttle valve control module Page 24-44

_{- Perform idling check}

Page 24-95

(8)

Display group 2 (Basic functions) Mass Air Flow (MAF) sensor Engine running at idling speed

Read Measuring Value

xxxx

RPM xxx% ms x.x g/s x.x

1 2 3 4 Display zones Specification Evaluation Air mass drawn in 2.0 to 4.5 g/s Page

01-173 Injection period

Engine code AWW Engine code AWP

2.0 to 4.0 ms 1.5 to 4.0 ms Page 01-173

Engine load 15 to 25% Page

Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171 Note:

For display zone 4:

(9)

Evaluating display group 2, display zone 3 - Injection period Appears

on display Possible cause Corrective action

Less than

2.0 ms Large amount of fuel from the _{Evaporative Emission (EVAP)} system

- Check EVAP canister purge regulator valve Page 01-94 , Output Diagnostic Test Mode _{Incorrect injectors with greater}

throughput installed - Check injection rate 24-75 Page More than

4.0 ms Increased engine load due to electric _{consumers, air conditioner, gear} selected or power steering on full lock

- Eliminate increased load (air conditioner, power steering etc.)

Evaluating display group 2, display zone 4 - Air mass drawn in Appears on

Less than 2.0

g/s Large amount of unmetered air between _{intake manifold and Mass Air Flow (MAF)} sensor

- Repair unmetered air

Greater than

4.5 g/s Gear selected (automatic transmission) - Place selector lever in P _{or N}

Engine loaded due to ancillaries - Eliminate load (air conditioner, power steering etc.)

(10)

Display group 3 (Basic functions) Mass Air Flow (MAF) sensor Engine running at idling speed

xxxx RPM x.xx ms x.x% xx.x BTDC 1 2 3 4 Display zones Specification Evaluation Ignition angle Engine code AWW Engine code AWP 6 to 12 BTDC 5 to 12 BTDC ---

Throttle valve angle

(potentiometer 1 -G187-) 0.2 to 4.0%

Page

01-183

Air mass drawn in 2.0 to 4.5 g/s Page

(11)

Display group 4 (Basic functions) Engine running at idling speed Read Measuring Value

xxxx RPM xx.xxx V xxx.x C xxx.x C

1 2 3 4 Display zones Specification Evaluation

Intake air

temperature -48 to 110 C Page 01-178 Coolant temperature 60 to 110 C Page

01-177 Voltage supply for engine control

module 12.0 to 15.0 V Page 01-176

Engine speed (idling speed): Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171 Note:

The engine control module will use the intake air temperature as a replacement value for an engine start (start temperature - replacement value) as soon as there is a malfunction stored in the DTC memory, which affects the Engine Coolant Temperature (ECT) Sensor -G62-. The temperature then rises according to a model stored in the control module. When the engine has reached normal working temperature a fixed replacement value will be displayed after a certain period. This fixed value is also dependent upon the intake air temperature.

Note:

The total temperature range is given as the specification. The displayed value must be above ambient temperature.

(12)

Evaluating display group 4, display zone 2 - Control module voltage supply Appears on

Less than

12.0 V Alternator faulty, battery charge state _low

Repair Manual, Electrical Equipment, Repair Group 27

- Check alternator and battery voltage, charge battery:

Battery heavily charged shortly after starting due to high charging current and current consumers

- Increase revs slightly for a few minutes and switch off current consumers

Transfer resistance in the current supply or the engine control module Ground (GND) connection

- Check engine control module voltage supply Page 24-139

Current draw when ignition is off - Eliminate current draw More than

15.0 V Voltage regulator on alternator faulty

Repair Manual, Electrical Equipment, Repair Group 27

- Check voltage regulator, replace if necessary:

Excess voltage due to jump starting or quick charging unit

- Check DTC Memory Page 01-21

(13)

Evaluating display group 4, display zone 3 - Coolant temperature Appears

on display

Possible cause Corrective action

Less than

60 C Engine too cold - If necessary test drive vehicle

Coolant temperature sensor or wiring to engine control module

- Check coolant temperature sensor Page 24-52

Greater than 110

C

Radiator soiled - Clean radiator

Coolant fan not

functioning _{Electrical Wiring Diagrams, Troubleshooting &}

Component Locations

- Check function

Thermostat faulty

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo

Engine Mechanical, Engine Code(s): AWD, AWW, AWP, Repair Group 19; Removing and installing parts of cooling system: Parts of cooling system - engine side - Check thermostat Coolant temperature sensor or wiring to engine control module

- Check coolant temperature sensor Page 24-52

Constant

-48.0 C Wiring open circuit - Check coolant temperature sensor ₅₂ Page 24-Constant

143 C Short between wires _{3 and 4}

(14)

Evaluating display group 4, display zone 4 - Intake air temperature Appears on

display Possible cause Corrective action Constant -48.0

C Wiring open circuit - Check intake air temperature sensor _{Page 24-62} Constant 143 C _{Short between wires 1}

and 2

(15)

Block 5 Indicated on display

xxxx RPM

xxx% xxx km/h

Text

1 2 3 4 Display zones Specification Evaluation Operating mode (idling,

part throttle, enrichment, overrun)

Idling

---

Road speed 0 km/h ---

Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171

Note on display zone 2:

Engine load at idle is given as the specified value.

(16)

xxxx

RPM xxx% xxx.x C

xx.x%

1 2 3 4 Display zones Specification Evaluation Altitude correction

factor -50.0 to 20.0% --- Intake air temperature -48 to 110 C Page

01-178

Engine load at idle is given as the specified value.

The total temperature range is given as the specification. The displayed value must be

(17)

Only engine code AWP with automatic transmission:

Display group 8 -Basic function- Vacuum pump for brakes Ignition on, engine not running

Read measured value block

8 Indicated on display

Text Text xxx mbar

1 2 3 4 Display zones Specification Evaluation

Absolute pressure / brake

booster --- ---

Electrical vacuum pump ON/OFF --- ---

Brake pedal not depressed depressed --- --- --- 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(18)

Measuring value blocks, evaluating display groups 10 to 29 (Ignition)

Display group 10 (Ignition)

xxxx RPM xxx% x.x% xx.x BTDC 1 2 3 4 Display zones Specification Evaluation Ignition angle Engine code AWW Engine code AWP 5 to 15 BTDC 4 to 15 BTDC ---

Throttle valve angle

(potentiometer 1 -G187-) 0.3 to 4.0%

Page

01-183

(19)

(20)

Evaluating display group 10, display zone 2 - Engine load Appears on

Less than 10% _{Lesser values can only occur} when driving in overrun

More than

25% Rough idling (not running on all _cylinders) - Injectors or spark plugs faulty

Electric consumers switched on - Switch off electric consumers

Steering wheel at full lock - Set steering wheel to center position

_{Gear selected (automatic}

transmission) - Place selector lever in P or N _{Mass Air Flow (MAF) sensor}

faulty - Check Mass Air Flow (MAF) sensor Page 24-38 Evaluating display group 10, display zone 3 - Throttle valve angle

Appears on

More than

4% Engine control module not _{matched to throttle valve} control module

- Match engine control module to throttle valve control module Page 24-152

Throttle positon sensor in throttle valve control module faulty

- Check throttle valve control module Page 24-44

(21)

Display group 14 (Ignition) Misfire recognition Engine running at idling speed

xxxx RPM

xxx% xxx Text

1 2 3 4 Display zones Specification Evaluation Misfire recognition

(active, blocked) active Page 01-187

Misfire total 0 ---

The total of the detected misfires is displayed here. It provides no information about the time period in which the misfires have occurred. Therefore, check misfire recognition while

driving Page 28-25 .

(22)

Display group 15 -Ignition- Misfire recognition Cyl. 1 to Cyl. 3 While driving

15 display Indicated on

xxx xxx xxx Text

(activated, blocked)

activated ---

Misfire Cyl. 3 0 Page 01-187

(23)

Display group 16 -Ignition- misfire recognition Cyl. 4 While driving

Read measured value

block 16 display Indicated on

xxx --- --- Text

(activated, blocked)

activated ---

(24)

Evaluating display group 14, display zone 3 - Total number of misfires Appears on display Possible cause Corrective action

Greater than

specification Spark plug faulty Spark plug connector

faulty

Ignition coil faulty Ignition coil output

stage faulty

- Check ignition coils with output stage Page 28-11

- Check spark plugs Page 28-7

(25)

Display group 22 (Ignition) Knock control While driving

xxxx RPM x.xx% xx.x CA xx.x CA

1 2 3 4 Display zones Specification Evaluation No. 2 Cyl. retardation of

ignition timing by knock control

0 to 12.75 CA

Page 01-190 No. 1 Cyl. retardation of ignition

timing by knock control 0 to 12.75CA

Page 01-190

Engine load 10 to 150% ---

Engine speed (idling speed)

For display zones 3 and 4:

The displayed value should be 0.0 CA at idling.

(26)

Display group 23 (Ignition) Knock control While driving

xxxx RPM x.xx% xx.x CA xx.x CA

1 2 3 4 Display zones Specification Evaluation No. 4 Cyl. retardation of

ignition timing by knock control

0 to 12.75 CA

Page 01-190 No. 3 Cyl. retardation of ignition

timing by knock control 0 to 12.75CA

Page 01-190

(27)

Evaluating display groups 22/23, display zones 3 and 4 - Retardation of ignition Appears on

display Possible cause Corrective action All cylinders

12.75 CA Knock sensor _faulty - Check knock sensors Page 28-16

_Connector corroded _{Knock sensor} incorrectly tightened

- Loosen knock sensor and tighten to 20 Nm

_Ancillary

components on engine loose

- Tighten ancillary components

Poor fuel quality - Change type of fuel One cylinder

deviates greatly from the others

Connector

corroded - Check knock sensors Page 28-16

_{Engine damaged}

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AWD, AWW, AWP, Repair Group 15; Removing and installing cylinder head; Checking compression pressure

- Check compression pressures:

_Ancillary

components on engine loose

- Tighten ancillary components

(28)

Display group 28 (Ignition) knock control While driving

xxxx RPM

xx.x% xxx.x C

Text

1 2 3 4 Display zones Specification Evaluation Result of knock sensor

test (Test on / Test off / Sys. OK. / Sys. n.OK.

Sys. OK. --- Coolant temperature 40 to 110 C Page

01-177

Engine speed 2200 to 6800

(29)

Measuring value blocks, evaluating display groups 30 to 49, 99, 107

(oxygen sensor control)

Display group 30 (oxygen sensor control) Engine running at idling speed

xxx xxx

Oxygen sensor control status after

catalyst 110 Page 01-193

Oxygen sensor control status before catalyst 111 Page 01-193 Note:

For display zones 2:

The 3rd display position is not set to 1 until in part throttle range.

(30)

Significance of 3 digit number block in display zones 1 and 2 Significance if display = 1

1 2 3

1 Oxygen sensor control active 1 Oxygen sensor operationally ready 1 Oxygen sensor heating on

(31)

Display group 32 (oxygen sensor control) Oxygen sensor learned values Engine running at idling speed

xx.x% xx.x%

Oxygen sensor learned value at part

load (multiplicative) -10 to 10% Page 01-195 Oxygen sensor learned value at idling speed

(additive) -10 to 10% Page 01-195

Note:

Low values indicate that the engine is running too rich and therefore the oxygen sensor

control is leaning the mixture.

High values indicate that the engine is running too lean and therefore the oxygen sensor

control enriches the mixture.

If there is no voltage supply to the control module all the values learned will be

cancelled.

add = additive - The effects of the malfunction (e.g. unmetered air) will reduce as the

engine speed increases. The injection period will be modified by a fixed amount for additive learned values. This amount is not dependent upon the basic injection period.

mul = multiplicative - The effects of the malfunction (e.g. malfunctioning injector) will

increase as the engine speed increases. A multiplicative learned value is a proportional change to the injection period. This change is dependent on the basic injection period.

(32)

Note:

Initiating learning process: Control module in mode 04, Basic settings

Learning conditions for idling: Idling, coolant temperature min. 75 C, intake air

temperature max. 90 C

Learning conditions for part load: coolant temperature min. 75 C, intake air temperature

max. 90 C

EVAP canister purge regulator valve must be closed and the A/C compressor must be

off.

Evaluating display zone 32, display zones 1 and 2 - Oxygen sensor learned values Appears on

Low oxygen sensor learned

values

Low learned values at idling but with normal learned values at part

throttle: possible oil dilution (high level of fuel in oil)

- Disappears after motorway drive or oil change

_{Injector leaking} _{- Check injector}_Page 24-75

_{Fuel pressure too high} _{- Check fuel pressure} regulator and holding pressure Page 24-86 _{EVAP canister purge regulator valve}

permanently open - Check EVAP canister purge regulator valve Page 01-94 , Output Diagnostic Test Mode

(33)

Appears on

display Possible cause Corrective action

High oxygen sensor learned

values

High learned values at idling speed, not so high learned values at part throttle: possible unmetered air in area of intake manifold

- Check intake air system for leaks Page 24-92

Unmetered air between Mass Air Flow

(MAF) sensor and throttle valve - Repair cause

Injector blocked - Check quantity injected rate Page 24-75

Display zones 1 and 2 high: Mass Air

Flow (MAF) sensor faulty - Check Mass Air Flow (MAF) sensor Page 24-38

Fuel pressure too low - Check fuel pressure regulator and holding pressure Page 24-86

Unmetered air at exhaust manifold gasket

Oxygen sensor heating faulty or oxygen

sensor soiled - Check oxygen sensor heating Page 24-26

(34)

Display group 33 (oxygen sensor control) Oxygen sensor control values Engine running at idling speed

xx.x% x.xxx V

Oxygen sensor voltage, oxygen

sensor before catalyst 0.000 to 5.000 V Page 01-199 Oxygen sensor regulator before catalyst -10.0 to 10.0% Page

01-198 Note:

The display must fluctuate around 0. If constant 0 is displayed, the oxygen sensor control has switched from regulation to control, because there is a malfunction in the oxygen sensor control. Check DTC Memory Page 01-21 .

(35)

Evaluating display group 33, display zone 1 - oxygen sensor regulator before catalyst

Appears on

Outside tolerance

range

Minus range: Mixture too rich, oxygen sensor control weakens mixture

Positive range: Mixture too lean, oxygen sensor control enriches mixture

- Wait 30 seconds until display has stabilized

Unmetered air - Check intake system for leaks Page 24-92

Injector faulty - Check injection rate Page 24-75

Oxygen sensor learned value on

limit - Check oxygen sensor learned value in display group 32

(36)

Readiness code

Display group 34 (oxygen sensor control) oxygen sensor diagnostic before catalyst (checking age via cycle duration monitoring)

Vehicle stationary, engine running at increased idling speed Control module in mode 04-Basic settings

Read Measuring

Value Block 34 Indicated on display xxxx

RPM xxx.x C

xx.xx

s Text

1 2 3 4 Display zones Specification Evaluation Result of oxygen sensor

before catalyst age check (test OFF/test ON/B1-S1 OK / B1-S1 n.OK) B1-S1 OK --- Cycle duration oxygen sensor before

catalyst 0.50 to 2.50 --- Catalyst temperature 350 to 500 C --- Engine speed 1800 to 2200 rpm --- Note:

(37)

Readiness code

Display group 36 (oxygen sensor control) Operational readiness of oxygen sensor after catalyst

Engine running at idling speed

Control module in mode 04-Basic settings Read Measuring

Value Block 36 Indicated on display

x.xxx V Text

1 2 3 4 Display zones Specification Evaluation

Check oxygen sensor after catalyst (Test OFF/Test ON/B1-S2 OK / B1-S2 n.OK)

B1-S2 OK

---

Oxygen sensor voltage, oxygen sensor after

catalyst 0.100 to 0.900 V Page 01-201

(38)

Evaluating display group 36, display zone 1 - Oxygen sensor voltage,oxygen sensor after catalyst

Appears on

Constant 1.100 V _{Short to positive via: oxygen sensor,} sensor wiring, Ground (GND) wiring, engine control module

- Check oxygen sensor wiring Page 24-117

Constant between

0.400 to 0.500 V Open circuit via: oxygen sensor, sensor _{wiring, Ground (GND) wiring, engine} control module

Constant 0.000 V

Short to Ground (GND) via: oxygen sensor, sensor wiring, Ground (GND) wiring, engine control module

(39)

Readiness code

Display group 37 (oxygen sensor control) oxygen sensor - dwell period test Engine running at idling speed

Control module in mode 04-Basic settings Read Measuring Value

xxx% x.xxx

V xxxx ms Text

1 2 3 4 Display zones Specification Evaluation Result (Test On / OFF / Syst. OK / n.OK) Syst. OK

Dwell period oxygen sensor control before catalyst

-0.02 to 0.02 Oxygen sensor voltage, oxygen sensor

after catalyst 0.100 to 0.900 V Page 01-201 Engine load 10 to 150% --- Note:

The entire display range is given.

(40)

Display group 41 (oxygen sensor control) oxygen sensor heating Engine running at idling speed

x.x kOhm

Text x.x kOhm

Text

1 2 3 4 Display zones Specification Evaluation Oxygen sensor heating

after catalyst Htg.aC.ON Htg.aC.OFF

---

Oxygen sensor heating after

catalyst, resistance 0.0 to 2.0 kOhm --- Oxygen sensor heating before catalyst Htg.bC.ON

Htg.bC.OFF

---

Note:

The oxygen sensor heating may be switched ON or OFF depending on the operating conditions of the engine, therefore the display in display zone 2 or 4 may show "Htg.b(a) C.ON" or alternating from "Htg.b(a)C.ON" to Htg.b(a)C.OFF".

Note:

In the case of oxygen sensor heating open circuit, there will be no display in Display group 3.

(41)

Readiness code

Display group 43 (oxygen sensor control) oxygen sensor diagnostic after catalyst (ageing check)

Vehicle stationary, engine running at increased idling speed Control module in mode 04-Basic settings

Read Measuring

RPM xxx.x C

xx.xx

s Text

1 2 3 4 Display zones Specification Evaluation Result of aging check of

oxygen sensor after catalyst (test OFF/test ON/B1-S2 OK / B1-S2 n.OK) B1-S1 OK --- Oxygen sensor voltage, oxygen

sensor after catalyst

0.100 to 0.900 V

---

Catalyst temperature min. 300 C ---

rpm ---

Note:

Value calculated from engine speed and engine load.

(42)

Readiness code

Display group 46 (oxygen sensor control) Catalyst diagnostic (conversion test) Vehicle stationary, engine running at increased idling speed

RPM

xxxx C

x.xx Text

1 2 3 4 Display zones Specification Evaluation Result of catalyst conversion

test (Test OFF/test ON/Cat B1 OK/Cat B1 n.OK) Cat B1 OK --- Amplitude ratio 0.00 to 0.32 ---

Catalyst temperature min. 440 C ---

(43)

Display group 99 -Oxygen sensor control - oxygen sensor operating condition Engine running at idling speed

Control module in mode 04-Basic setting, oxygen sensor control off

Control module in mode 08-Read measured value block, oxygen sensor control on Read measured value

block 99 Indicated on display

xxxx

rpm xx.x C

x.x% Text

1 2 3 4 Display zones Specification Evaluation Oxygen sensor control

operating mode -Cont. OFF or -Cont. ON

---

Oxygen sensor control -10.0...10.0% Page 01-198

Coolant temperature 80...110 C Page

01-177 Engine speed Manual transmission Automatic transmission 700...6800 rpm 640...6800 rpm Page 01-171

Notes on display zone 4:

For a defined fault finding the oxygen sensor control is switched off when selecting

display group 99 under "Basic setting" or switched on under "Read measured value block". When the function 04 "Basic setting" is exited the oxygen sensor control is automatically active again.

It is possible to switch between the function 04 "Basic setting" and the function 08 "Read

measured value block" by pressing the keys 4 and 8 on V.A.G 1551/1552.

(44)

Readiness code

Display group 107 -Oxygen sensor control- Diagnostic of fuel system Engine running at idling speed

RPM

x.x% Text

1 2 3 4 Display zones Specification Evaluation Result of diagnostic (Test

OFF/Test ON / Syst. OK / Syst. n.OK) Syst. OK ---

Oxygen sensor control (mean value) -23.0 to

23.0% --- Engine speed (idling speed):

(45)

Measuring value blocks, evaluating display groups 50 to 69 (Speed

regulation)

Display group 50 (Speed regulation) Operating condition Engine running at idling speed

xxxx

RPM RPM xxxx Text Text

1 2 3 4 Display zones Specification Evaluation Air conditioner compressor

operating mode ON/OFF Compr. ON or Compr. OFF

---

Air conditioner operating mode A/C-High or A/C-Low

---

Engine speed (idling speed specification): Manual transmission Automatic transmission 760 RPM 700 RPM ---

Engine speed (idling speed): Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171 Note:

The specified engine speed from engine control module (calculated in control module) is displayed. In exceptional cases the idling speed can be adapted Page 24-100 . The idle speed figures with gear selected are then automatically modified.

Note:

(46)

A/C-High = Air conditioner demands too high a heating or cooling output A/C-Low = Air conditioner not switched on.

(47)

Note:

"Compr. OFF" is always displayed on vehicles without air conditioner. Checking signal from and to air conditioner compressor Page 24-166

Display group 54 (Speed regulation) While driving

xxxx

RPM Text xxx% xxx%

1 2 3 4 Display zones Specification Evaluation Angle sensor -1- for

throttle drive (power accelerator actuation) -G187- 0 to 100% --- Throttle position (TP) sensor

-G79- 0 to 100% ---

Operating mode (idling, part load,

enrichment, overrun) --- ---

(48)

Display group 55 (Speed regulation) Idling stabilization Engine running at idling speed

Read Measuring Value Block

xxxx

RPM xx.xx% xx.xx% xxxxx

Operating mode xxxxx Page

01-211 Idling regulator learning

value

Air conditioner on (A/C High)

Air conditioner off (A/C Low) -6.0 to 6.0% -3.0 to 3.0% --- Idling regulator -4.30 to 12.20% --- Engine speed (idling speed):

Displayed is the amount that the idling speed stabilization has moved away from the prescribed average. For a new engine the values lie in the positive range, because of the

(49)

Significance of 5 digit number block Significance if display = 1 1 2 3 4 5 Significance

1 Air conditioner compressor switched on 1 Driving range (gear) selected

1 Air conditioning system switched on 1 Rear window defroster on

1 Power assisted steering pressure switch on

(50)

Display group 56 (Speed regulation) Idling speed stabilization Engine running at idling speed

xxxx

RPM RPM xxxx xx.x% xxxxx

Operating mode xxxxx Page

01-211

Idling regulator -4.30 to

12.20% --- Engine speed (idling speed

specification): Manual transmission Automatic transmission 760 RPM 700 RPM ---

Engine speed (idling speed): Manual transmission Automatic transmission 700 to 820 RPM 640 to 760 RPM Page 01-171

(51)

Readiness code

Display group 60 (Speed regulation) Adaptation EPC system 1) Ignition on, engine not running

Control unit in mode 04 basic setting Read Measuring

Value Block 60 Indicated on display

xx% xx% x Text

1 2 3 4 Display zones Specification Evaluation Adaptation condition (ADP

runs, ADP OK or ADP ERROR)

ADP OK

---

Learning step counter 0 to 8 ---

Angle sensor -2- for throttle drive (power

accelerator actuation) -G188- 97 to 3% --- Angle sensor -1- for throttle drive (power accelerator

actuation) -G187- 3 to 93% ---

1)_{Adapting engine control module to throttle valve control module}_{Page 24-152}_.

Note:

Matching the throttle valve control module is performed with ignition switched on.

Engine control module is adapted to throttle valve control module when selecting display

group 60 under function 04 "Basic setting". This adaptation must always be carried out when another throttle valve control module (or another complete engine) or another engine control module is installed.

The counter counts up to 8 in display zone 3 during the adaptation.

(52)

Display group 61 (Speed regulation) Electronic Power Control (EPC) While driving

xxxx

RPM xx.xxx V xxx% xxxxx

Operating condition xxxx Page

01-211 Throttle drive (power

accelerator actuation) -G186- 0 to 100% --- Supply voltage for engine control

module 12.0 to 15.0 V Page 01-176

Engine speed (idling speed) Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM Page 01-171

(53)

Display group 62 (Speed regulation) Electronic Power Control (EPC) Ignition on, engine not running

xx% xx% xx% xx%

1 2 3 4 Display zones Specification Evaluation Sender -2- for accelerator

pedal position -G185- 0 to 100%

--- Throttle Position (TP) Sensor

12 to 97% ---

Angle sensor -2- for throttle drive (power

accelerator actuation) -G188- 97 to 3% --- Angle sensor -1- for throttle drive (power accelerator

actuation) -G187- 3 to 93% ---

Note on display zone 4:

(54)

Vehicles with automatic transmissions

Display group 63 (Speed regulation) Kick down adaptation Ignition on, engine not running

Control unit in mode 04 basic setting Accelerator pedal fully depressed Read Measuring Value

xx% xx% Text Text

1 2 3 4 Display zones Specification Evaluation Operating mode (ERROR,

actuate, ADP. runs, ADP. OK

ADP. OK

Page 01-211

Kick-down switch Kick-down ---

Sender 2 for accelerator pedal position

-G185- 0 to 100% ---

Throttle position (TP) sensor -G79- -25 to 25% --- Note:

(55)

Vehicles with engine code AWP and cruise control system (CCS) Display group 66 -Cruise control system

km/h xxxx km/h xxxx

1 2 3 4 Display zones Specification Evaluation Switch position of CCS

controls switch 00000011 Page 01-220 Specified road speed (last

value stored by CCS)

--- ---

Brakes, clutch and CCS switches

position 00001000 Page 01-220

Road speed (actual) 0 km/h ---

(56)

Significance of the numbers in the 8-digit display, display field 2, brake and cruise control switch

Note:

Only the last four digits of the 8-digit display are described in the following table.

1 0 1 1 Significance

Brake depressed (brake light switch) Brake depressed (brake pedal switch)

Constant 0 for vehicles with automatic transmission (clutch switch) Cruise control system operational

Checking brake light and brake pedal switch Page 24-182 .

Set cruise control system to operational with log-in code 11463; deactivate with log-in

code 16167.

Electrical system; Repair group 27

Significance of the numbers in the 8-digit display, display field 4, cruise control switch

Note:

Only the last four digits of the 8-digit display are described in the following table.

CCS sliding switch at off (locked only; not locked = 1) CCS sliding switch at off (locked)

SET button depressed CCS sliding switch at RES

(57)

Vehicles with engine code AWW and cruise control system (CCS) Display group 66 -Cruise control system

Engine running at idling speed Read measured value

block 66 Indicated on display

km/h xxxx km/h xxxx

1 2 3 4 Display zones Specification Evaluation Switch position of CCS

controls switch 0000 Page 01-220 Specified road speed (last value

stored by CCS)

--- ---

Brakes, clutch and CCS switches

position 1000 Page 01-220

Road speed (actual) 0 km/h ---

(58)

Significance of the figures in the 4 digit display, display zone 2, brakes, clutch and CCS switches position

Brake depressed (brake light switch) Brake depressed (brake pedal switch)

Clutch depressed or on automatic transmission brake depressed Cruise control system operational

Note:

For 4 digit display:

Checking clutch pedal switch -Engine code AWW: Page 24-176 ; Engine code AWP:

Page 24-170 .

Checking brake light and brake pedal switch Page 24-182

Set cruise control system to operational with log-in code 11463; deactivate with log-in

code 16167.

Significance of the figures in the 4 digit display, display zone 4, CCS control switches

CCS sliding switch at off (switch locked only)

CCS sliding switch at off (switch not locked or locked) SET button depressed

CCS sliding switch at RES Note:

(59)

(60)

Measuring value blocks, evaluating display groups 70 to 79 (emission

reduction)

Readiness code

Display group 70 (emission reduction) Evaporative Emission (EVAP) system diagnostic (fuel tank venting system)

Engine running at idling speed Coolant temperature at least 60 C

xxx% xx.x% Text

ON / OFF or TBV OK / n.OK) TBV OK ---

EVAP purge flow rate 0 to 100% ---

Oxygen sensor control deviation in TBV diagnostic

-7.0 to 7.0% --- EVAP canister purge regulator valve duty cycle 0 to 100% ---

(61)

Note:

TBV means fuel tank venting valve (EVAP canister purge regulator valve). The diagnostic can only be initiated once per engine start.

The value is only indicated for diagnostic via air path. The entire display range is indicated.

(62)

Readiness code

Display group 71 -Exhaust reduction- Leak diagnostic system Engine running at idling speed

Coolant temperature at least 80 C

Text Text Text Text

ON/ OFF, Syst. OK / n.OK) Syst. OK

--- Diagnostic status

(Syst.Test/End.Test) End of Test --- DTC message (small leak/large leak) --- --- Reed-contact condition (Reed closed/Reed open) Reed open --- Note:

(63)

Readiness code

Display group 77 (emission reduction) Secondary air system diagnostic Vehicle stationary, engine running at increased idling speed

Coolant temperature at least 75 C

RPM xx.x g/s g/s x.x Text

ON/ OFF, Syst. OK / n.OK) Syst. OK

--- Secondary air system air mass -100 to 100% ---

Air mass drawn in 5.0 to 12.0

g/s Page 01-173 Engine speed (idling speed)

Manual transmission Automatic transmission 700 to 820 rpm 640 to 760 rpm Page 01-171 Note:

(64)

Measured value blocks, evaluating display groups 86 to 89, 100 (Readiness

code)

Display group 89 -Trip odometer- Exhaust Malfunction Indicator Lamp (MIL) on Engine running at idling speed

xxxx km Text

Requirement "Tank empty" (OK / too

small) --- ---

Engine code AWW:

Distance traveled with exhaust Malfunction Indicator Lamp (MIL) on

Engine code AWP: No display

--- ---

Note:

(65)

Display group 100 (Readiness code) Engine running at idling speed Read Measuring Value

xxxxxxxx xxx.x C xxxx s xxxxxxxx 1 2 3 4 Display zones Specification Evaluation Diagnostic status --- ---

Period since last engine

start --- ---

Coolant temperature 80 to 110 C Page

01-177

Readiness code 00000000 Page

01-227

(66)

Significance of 8 digit number block for readiness code

The readiness code is generated only when all display zones show 0 1 2 3 4 5 6 7 8 Diagnostic function

0 Catalyst

0 Catalyst heating (currently no diagnostic/always "0")

0 Evaporative Emission (EVAP) system (tank venting system) 0 Secondary air system

0 Air conditioner (currently no diagnostic/always "0") 0 Oxygen sensors

0 Oxygen sensor heating

(67)

Measuring value blocks, evaluating display groups 90 to 97 (Performance

increase)

Display group 91 (Performance increase) Camshaft adjustment While driving

xxxx/min xxx% Text x.x KW

Active camshaft

adjustment angle -3 to 25 CA --- Camshaft adjustment On /

Off --- ---

Engine speed (idling speed) Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM Page 01-171 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(68)

Note:

There are only two positions for the adjustable camshaft, the normal position and the

switched position. To bring the camshaft into the switched position, accelerate the vehicle in 1st gear from rest. Display zone 4 shows the actual position of the adjustable camshaft. If the activation of the adjustable camshaft is active - see display zone 3- it can be seen in display zone 4 whether in fact an adjustment of the camshaft has occurred (feed-back information). Camshaft in normal position = -3.0 to +6.0 CA. Camshaft in switched position = 16.0 to 25.0 CA

If during test drive display zone 4 displays a value between 6.0 CA and16.0 CA , the

electric camshaft adjustment valve is correctly directing oil pressure to the mechanical camshaft adjuster, but it cannot attain its end position (e.g. for reasons of

stiffness/tightness).

Checking camshaft adjustment:

Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AWD, AWW, AWP, Repair Group 15; Servicing valve gear, checking camshaft adjustment

(69)

Display group 94 (Performance increase) Camshaft adjustment Vehicle stationary, engine running at increased idling speed Control module in mode 04-Basic settings

xxxx/min Text Text

Result of diagnostic (Test OFF/Test ON/Syst.OK/Syst. nOK) Syst. OK --- Camshaft adjustment CAM-ADJ.ON CAM-ADJ.OFF CAM-ADJ.ON --- Engine speed 1080 to 2600 rpm --- 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(70)

Measuring value blocks, evaluating display groups 110 to 119 (Charge

pressure control)

Display group 111 - Charge pressure control - adaptation valves for boost pressure limitation

x.x% x.x% x.x% x.x%

RPM range 4 -15 to 160% ---

RPM range 3 -15 to 160% ---

RPM range 2 -15 to 160% ---

(71)

Display group 113 - Charge pressure control Engine running at idling speed

xxxx

RPM xxx.x% xxx.x% mbar xxx

atmospheric pressure

(air pressure) 500 to 1200 mbar Page 01-233 Angle sensor -1- for throttle

drive (power accelerator actuation) -G187- 0 to 100% --- Engine load 10 to 150% ---

(72)

Evaluating display group 113, display zone 4 - atmospheric pressure Elevation Air pressure

0 m 998 mbar 500 m 954 mbar 1000 m 902 mbar 1500 m 853 mbar 2000 m 805 mbar 2500 m 756 mbar 3000 m 704 mbar 3500 m 655 mbar 4000 m 607 mbar Note:

(73)

Display group 114 (Charge pressure control) While driving

xxx.x% xxx.x% xxx.x% xxx.x%

Wastegate bypass

regulator valve duty cycle

0 to 100% ---

Specified engine load after correction (reduced via knock control, altitude adaptation and coolant temperature)

max. 150% ---

Specified engine load (mapped value via

accelerator pedal position) max. 150% ---

(74)

xxxx

RPM xxx.x% mbar xxx mbar xxx

Actual charge value Engine code AWW Engine code AWP max. 1800 mbar max. 2200 mbar ---

Specified charge pressure Engine code AWW

Engine code AWP

max. 1800 mbar max. 2200 mbar --- Engine load 10 to 150% ---

Engine speed (idling speed) Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM ---

(75)

Display group 116 - Charge pressure control While driving

xxxx RPM

x.x% x.x% x.x%

1 2 3 4 Display zones Specification Evaluation Intake air temperature

correction factor 7 to -15% ---

---

Fuel correction factor 0 to -27% ---

Engine speed (idling speed) Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM --- 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(76)

xxxx

RPM xxx.x% xxx.x% mbar xxx

Specified charge

pressure

1800 mbar 2200 mbar

---

Angle sensor -1- for throttle drive (power accelerator actuation) -G187-

0 to 100% ---

Throttle position (TP) sensor -G79- 0 to 100% --- Engine speed (idling speed)

Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM ---

(77)

xxxx

RPM xxx.x C

xxx.x% xxx

mbar

Actual charge

value

max. 1800 mbar max. 2200 mbar ---

Wastegate bypass regulator

valve duty cycle

0 to 95%

---

Intake air temperature max. 110 C ---

Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM --- 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(78)

xxxx

RPM x.x% x.x% mbar xxx

Actual charge

value

max. 1800 mbar max. 2200 mbar ---

Wastegate bypass regulator

valve duty cycle

0 to 100%

--- Boost pressure limitation -15 to 160% --- Engine speed (idling speed)

Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM ---

(79)

Measuring value blocks, evaluating display groups 120 to 129

(Communication)

Display group 120 -Traction control -ASR- While driving

xxxx

RPM Nm xxx Nm xxx Text

Status TC active / TC

n.active ---

Actual engine load 0 to 260 Nm ---

Specified engine load 0 to 440 Nm ---

Engine speed (idling speed) Manual transmission Automatic transmission 700 to 6800 RPM 640 to 6800 RPM --- 02/06/2003 http://127.0.0.1:8080/vw/servlet/Display?action=Goto&type=repair&id=VW.A4.FU05.0...

(80)

Display group 122 -Transmission (automatic only) While driving

xxxx

RPM Nm xxx Nm xxx Text

Status Engine

interv./no engine interv.

---

Actual engine load 0 to 260 Nm --- Specified engine load 0 to 440 Nm --- Engine speed (idling speed)

(81)

Display group 125 -Communication -data bus messages- Engine running at idling speed

Text Text Text Text

Air conditioning A/C 1

Combi-instrument Combi 1 ---

ABS status ABS 1 ---

Transmission status Transmission

1 ---

Note:

Specification = 1; Control modules with active data bus are displayed.

(82)

Display group 126 -Communication -data bus messages- Engine running at idling speed

Text

Airbag status Airbag 1 ---

Note on display group 126: