FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Course Overview:
In this module you will find and determine the cause of skewed HDS PGM-FI data.
Identifying skewed data on the HDS Data List and the cause of the incorrect data is essential to diagnosing and repairing these problems while avoiding unnecessary part replacement.
Course Requirements:
● Diagnose the 3 vehicles based on the scenario provided.
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Vehicle 1: Troubleshoot a vehicle with the MIL on
Customer Complaint - The MIL is on, and DTC P00CF is stored.
Open the DTC Troubleshooting for DTC P00CF for your assigned vehicle.
1. Follow the service procedure, what does the procedure lead you to replace? _____________________________________________________________
Open Advanced Diagnostics for DTC P00CF for your assigned vehicle.
2. Which inputs does the PCM monitor for this DTC? _________________________________________________________________________________
_________________________________________________________________________________________________________________________
Connect HDS and reset the PCM.
Open the PGM-FI Data List.
3. Which of the inputs you listed in Question #2 are not within the expected values range in Training Aid B? Record the input name and the voltage value shown in the data list. ________________________________________________________________________________________________________
Using the method you learned in FBS12, test the wiring to this sensor at the test points provided.
Record your voltage measurements in the chart below. Do not round your measurements, write down what is on the meter display.
Measured Voltage Connected Measured Voltage Disconnected (if necessary) VCC
Input Ground
NOTE: Since the wires in the harnesses we are using in the Training Center are all the same color, you can determine which wire is which by looking at the connector view if necessary. Also, remember that VCC should have the highest voltage, SG should have the lowest voltage, and the signal wire should be somewhere in between.
4. What is causing this sensor value to be outside of the expected value range? ___________________________________________________________
5. What repair is needed to fix the car? ____________________________________________________________________________________________
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Vehicle 2: Troubleshoot a vehicle that is hard to start
Customer Complaint - During PDI/TQI, you notice that the car cranks for an extended time. The MIL is on and code P0106 is stored.
Open the DTC Troubleshooting for DTC P0106 for your assigned vehicle.
1. Following the DTC Troubleshooting flow chart, what does the procedure lead you to replace? _______________________________________________
Open Advanced Diagnostics for DTC P0106 for your assigned vehicle.
2. Which inputs does the PCM monitor for this DTC? _________________________________________________________________________________
_________________________________________________________________________________________________________________________
Connect HDS and reset the PCM.
Open the PGM-FI Data List.
3. Which of the inputs you listed in Question #2 are not within the expected values range in Training Aid B? Record the input name and the voltage value shown in the data list. ________________________________________________________________________________________________________
Using the method you learned in FBS12, test the wiring to this sensor at the test points provided.
Record your voltage measurements in the chart below. Do not round your measurements, write down what is on the meter display.
Check Point
STOP and present your findings to your instructor. Instructor’s initials: _____________
Measured Voltage Connected Measured Voltage Disconnected (if necessary) VCC
Input Ground
NOTE: Since the wires in the harnesses we are using in the Training Center are all the same color, you can determine which wire is which by looking at the connector view if necessary. Also, remember that VCC should have the highest voltage, SG should have the lowest voltage, and the signal wire should be somewhere in between.
4. What is causing this sensor value to be outside of the expected value range? ___________________________________________________________
5. What repair is needed to fix the car? ____________________________________________________________________________________________
6. Did the DTC Troubleshooting procedure cover all of the possible failures? _______________________________________________________________
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Vehicle 3: Troubleshoot a vehicle with the MIL on
NOTE: Only DTC P2279 should be stored. If other DTC’s are present, see your instructor before proceeding.
Open the DTC Troubleshooting for DTC P2279 for your assigned vehicle.
1. Following the DTC Troubleshooting flow chart, what does the procedure lead you to check?
_________________________________________________________________________________________________________________________
Open Advanced Diagnostics for DTC P2279 for your assigned vehicle.
2. Read the Malfunction Threshold section. Which sensor(s) could monitor the values listed? _________________________________________________
Connect HDS and reset the PCM.
3. Which of the inputs you listed in Question #2 are not within the expected values range in Training Aid B? Record the input name and the voltage value shown in the data list. _______________________________________________________________________________________________________
Using the method you learned in FBS12, test the wiring to this sensor.
Record your voltage measurements in the chart below. Do not round your measurements, write down what is on the meter display.
4. What is causing this sensor value to be outside of the expected value range? ____________________________________________________________
5. What repair is needed to fix the car? ____________________________________________________________________________________________
6. Did the DTC Troubleshooting procedure cover all of the possible failures? _______________________________________________________________
Open the PCM (All) diagram in the EWD and be ready to show it to your instructor.
Measured Voltage Connected Measured Voltage Disconnected (if necessary) VCC
Input Ground
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Making DMM Measurements at Electrical Connectors
● Never back probe under hood ECM/PCM terminals. DAMAGE WILL OCCUR
● Never force a large test probe into a small connector cavity.
DAMAGE WILL OCCUR
● Never pierce or cut wire insulation. CORROSION WILL OCCUR
● Always probe between the wire seal and connector body (not between the wire and the seal)
Training Aid A
Do Not Insert DMM Test Probes Into Connectors
07TAZ-001020A Back Probe Adapters
Back Probe Adapter
Back Probe Adapter U-Shaped Tip
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Turbo Vehicles
Turbo vehicles up to and including MY 2021.
NSX not incuded
KOEO Sensor Verification Check
(Engine Cold. ECT matches ambient temp)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Barometric Pressure Sensor (kPa/psi reading)
BARO Sensor Measures atmospheric pressure Key on Engine Off 100 to 103 kPa at sea level
(15 to 16 psi) High Elevation Approx 5,000 feet 82 kPa Barometric Pressure Sensor (Voltage)
BARO Sensor Measures atmospheric pressure
Key on Engine Off 2.8 to 2.9 volts at sea level High Elevation Approx 5,000 feet 2.5 volts
Note: If BARO sensors reads approx 4.0 volts. Use kPa/psi comparison reading.
Manifold Absolute Pressure
MAP Sensor Measures absolute intake
manifold pressure
Key on Engine off 1.69 to 1.74 volts at sea level (Should match Boost Sensor) High Elevation Approx 5,000 feet 1.47 volts
Turbocharger Boost Pressure sensor
TC Boost Pressure Sensor Measures the boost pressure coming out of the turbocharger
Key on Engine off 1.69 to 1.74 volts at sea level (Should match MAP Sensor) High Elevation Approx 5,000 feet 1.47 volts
Engine Coolant Temperature Sensor
ECT Sensor (°F/°C) Measures engine coolant
temperature Key on Engine off (Engine Cold) Roughly matches ambient temperature Fuel Rail Pressure Sensor
PF Sensor Measures fuel rail pressure Key on Engine off (Engine Cold) Roughly matches low pump pressure spec Fuel Tank Pressure Sensor
FTP Sensor Measures charcoal canister
pressure Key on Engine off 2.45 to 2.55 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Manifold Absolute Pressure MAP Sensor
Measures absolute intake manifold
pressure Engine idling (normal operating temp) .69 to .80 volts High Elevation Approx 5,000 feet .65 to .67 volts Turbocharger Boost Pressure sensor
TC Boost Pressure Sensor Measures the boost pressure coming
out of the turbocharger Engine idling (normal operating temp) 1.69 to 1.74 volts at sea level High Elevation Approx 5,000 feet 1.47 volts
Mass Air Flow Sensor MAF Sensor
Measures air flow into the Engine 2500 RPM Test (+/- 30 RPM) Look in the SIS
troubleshooting for DTC P0171 to find spec Fuel Rail Pressure Sensor
PF Sensor Measures fuel rail pressure Engine idling (normal operating temp) 500 psi +/- 10 psi from Target Fuel Pressure
(3,440 to 3,530 kPa) Intake Air Temperature Sensor
IAT Sensor (1) Measures intake air temperature Engine idling (normal operating temp) 1.45 to 2.8 volts Engine Coolant Temperature Sensor
ECT Sensor Measures engine coolant
temperature Engine idling Normal operating temp. .45 - .60 volts
PGM-FI
Engine idling (normal operating temp)
Turbo Vehicles
Turbo vehicles up to and including MY 2021.
NSX not incuded
Fuel Trim (Correction Value)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Long Term Fuel Trim AF FB AVE (LT Fuel Trim)
ECM/PCM Average Correction Value The LTFT base setting is 1.00 Engine idling (normal operating
temp) .94 to 1.06 Normal Range
Short Term Fuel Trim AF FB (ST Fuel Trim)
ECM/PCM Immediate Correction Value The STFT base setting is 1.00 Engine idling (normal operating
temp) .94 to 1.06 Normal Range
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Secondary 02 Sensor H02S2 Sensor
Measures exhaust gas oxygen
content post catalytic converter Engine idling at normal operating
temperature .6 to .7 volts
This is the target value for secondary 02
Air Fuel Ratio Sensor
A/F Sensor Measures exhaust gas oxygen pre-
catalytic converter 4 Wire Sensor (measures in milliamps)
The leaner the mixture (more oxygen) the current is negative.
Richer mixture (less oxygen) the current is positive.
5 Wire Sensor (measures in milliamps)
The leaner the mixture (more oxygen) the current is positive.
Richer mixture (less oxygen) the current is negative.
Air/Fuel Lambda A/F Lambda
Calculated value of the air fuel ratio
taken from the A/F Sensor Lambda value of 1.00 means 14.7:1 air fuel ratio (Stoichiometric) Lambda value greater than 1.00 means the mixture is lean (More O2) Lambda value less than 1.00 means the mixture is rich (Less O2)
PGM-FI
Engine idling (normal operating temp)
Turbo Vehicles
Turbo vehicles up to and including MY 2021.
NSX not incuded
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Turbo Vehicles
Turbo vehicles up to and including MY 2021.
NSX not incuded
Throttle Control
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Throttle Position Sensor
TP Sensor Calculated value of throttle valve
position taken from TP Sensor A
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .59 to .67 volts Accelerator Pedal Pressed 3.90 to 3.96 volts Relative Throttle Position
REL TP Sensor
A learned value based on throttle valve opening measured from fully closed position. Due to carbon accumulation, this value will increase over time.
Engine idling
(normal operating temp) Below 2.46° (degrees)
Accelerator Pedal Position Sensor APP Sensor
Calculated value of accelerator pedal travel displayed in percentage
Key on Engine off 0%
Engine idling
(normal operating temp) 0%
Accelerator Pedal Pressed 105% to 116%
Accelerator Pedal Position Sensor APP Sensor A
Under Dash APP Sensor A
Actual measurement of the pedal travel twice the voltage of APP Sensor B
Key on Engine off .96 to 1.06 volts Engine idling
(normal operating temp) .96 to 1.06 volts Accelerator Pedal Pressed 4.70 to 4.80 volts Accelerator Pedal Position Sensor
APP Sensor B
Under Dash APP Sensor B
Actual measurement of the pedal travel half the voltage of APP Sensor A
Key on Engine off .47 to .51 volts Engine idling
(normal operating temp) .47 to .51 volts Accelerator Pedal Pressed 2.35 to 2.39 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Throttle Position Sensor A
TP Sensor A Actual measurement of the throttle
valve movement
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .61 to .69 volts Accelerator Pedal Pressed 3.92 to 3.96 volts Throttle Position Sensor B
TP Sensor B
Actual measurement of the throttle valve movement –redundancy check
Key on Engine off 4.12 to 4.33 volts Engine idling
(normal operating temp) 4.30 to 4.39 volts Accelerator Pedal Pressed 1.06 to 1.10 volts
Turbo Vehicles
Turbo vehicles up to and including MY 2021.
NSX not incuded
Throttle Control (continued)
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Direct Injection Non-Turbo Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
KOEO Sensor Verification Check
(Engine Cold. ECT matches ambient temp)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Barometric Pressure Sensor (kPa/psi reading)
BARO Sensor Measures atmospheric pressure Key on Engine Off 100 to 103 kPa at sea level
(15 to 16 psi) High Elevation Approx 5,000 feet 82 kPa Barometric Pressure Sensor (Voltage)
BARO Sensor Measures atmospheric pressure
Key on Engine Off 2.8 to 2.9 volts at sea level High Elevation Approx 5,000 feet 2.5 volts
Note: If BARO sensors reads approx 4.0 volts. Use kPa/psi comparison reading.
Manifold Absolute Pressure
MAP Sensor Measures absolute intake
manifold pressure Key on Engine off 2.8 to 2.9 volts at sea level High Elevation Approx 5,000 feet 2.5 volts
Engine Coolant Temperature Sensor
ECT Sensor (°F/°C) Measures engine coolant
temperature Key on Engine off (Engine Cold) Roughly matches ambient temperature Fuel Rail Pressure Sensor
PF Sensor Measures fuel rail pressure Key on Engine off (Engine Cold) Roughly matches low pump pressure spec Fuel Tank Pressure Sensor
FTP Sensor Measures charcoal canister
pressure Key on Engine off 2.45 to 2.55 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Direct Injection Non-Turbo Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Fuel Trim (Correction Value)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Long Term Fuel Trim
AF FB AVE (LT Fuel Trim) ECM/PCM Average Correction Value
The LTFT base setting is 1.00 Engine idling
(normal operating temp) .94 to 1.06 Normal Range Short Term Fuel Trim
AF FB (ST Fuel Trim) ECM/PCM Immediate Correction
Value
The STFT base setting is 1.00 Engine idling
(normal operating temp) .94 to 1.06 Normal Range
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Manifold Absolute Pressure MAP Sensor
Measures absolute intake manifold
pressure Engine idling (normal operating temp) .82 to .95 volts High Elevation Approx 5,000 feet .72 to .84 volts Mass Air Flow Sensor
MAF Sensor Measures air flow into the Engine 2500 RPM Test (+/- 30 RPM) Look in the SIS
troubleshooting for DTC P0171 to find spec Fuel Rail Pressure Sensor
PF Sensor Measures fuel rail pressure Engine idling (normal operating temp) 500 psi +/- 10 psi from Target Fuel Pressure
(3,440 to 3,530 kPa) Intake Air Temperature Sensor
IAT Sensor (1) Measures intake air temperature Engine idling (normal operating temp) 1.45 to 2.8 volts Engine Coolant Temperature Sensor
ECT Sensor Measures engine coolant
temperature Engine idling Normal operating temp. .45 - .60 volts
PGM-FI
Engine idling (normal operating temp)
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
EGR valve position Sensor
EGR VLS Measures the actual EGR pintle
position Engine idling (normal operating temp) 1.1 to 1.25 volts Secondary 02 Sensor
H02S2 Sensor Measures exhaust gas oxygen
content post catalytic converter Engine idling (normal operating temp) .60 to .70 volts
This is the target value for secondary 02
Air Fuel Ratio Sensor
A/F Sensor Measures exhaust gas oxygen pre-
catalytic converter
4 wire Sensor (Measures in milliamps)
The leaner the mixture (more oxygen) the current is negative.
Richer mixture (less oxygen) the current is positive.
5 Wire Sensor (Measures in milliamps)
The leaner the mixture (more oxygen) the current is positive.
Richer mixture (less oxygen) the current is negative.
Air/Fuel Lambda
A/F Lambda Calculated value of the air fuel ratio taken from the A/F Sensor
Lambda value of 1.00 means 14.7:1 air fuel ratio (Stoichiometric)
Lambda value greater than 1.00 means the mixture is lean (More O2) Lambda value less than 1.00 means the mixture is rich (Less O2)
Direct Injection Non-Turbo Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
PGM-FI (continued)
Engine idling (normal operating temp)
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Direct Injection Non-Turbo Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Throttle Control
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Throttle Position Sensor
TP Sensor Calculated value of throttle valve
position taken from TP Sensor A
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .59 to .67 volts Accelerator Pedal Pressed 3.90 to 3.96 volts Relative Throttle Position
REL TP Sensor
A learned value based on throttle valve opening measured from fully closed position. Due to carbon accumulation, this value will increase over time.
Engine idling
(normal operating temp) Below 2.46° (degrees)
Accelerator Pedal Position Sensor APP Sensor
Calculated value of accelerator pedal travel displayed in percentage
Key on Engine off 0%
Engine idling
(normal operating temp) 0%
Accelerator Pedal Pressed 105% to 116%
Accelerator Pedal Position Sensor APP Sensor A
Under Dash APP Sensor A
Actual measurement of the pedal travel twice the voltage of APP Sensor B.
Key on Engine off .96 to 1.06 volts Engine idling
(normal operating temp) .96 to 1.06 volts Accelerator Pedal Pressed 4.70 to 4.80 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Direct Injection Non-Turbo Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Throttle Control (continued)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Accelerator Pedal Position Sensor APP Sensor B
Under Dash APP Sensor B
Actual measurement of the pedal travel half the voltage of APP Sensor A.
Key on Engine off .47 to .51 volts Engine idling
(normal operating temp) .47 to .51 volts Accelerator Pedal Pressed 2.35 to 2.39 volts Throttle Position Sensor A
TP Sensor A Actual measurement of the throttle
valve movement
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .61 to .69 volts Accelerator Pedal Pressed 3.92 to 3.96 volts Throttle Position Sensor B
TP Sensor B
Actual measurement of the throttle valve movement –redundancy check
Key on Engine off 1.67 to 1.74 volts Engine idling
(normal operating temp) 1.47 to 1.53 volts Accelerator Pedal Pressed 4.12 to 4.19 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Multiport Injected Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
KOEO Sensor Verification Check
(Engine Cold. ECT matches ambient temp)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Barometric Pressure Sensor (kPa/psi reading)
BARO Sensor Measures atmospheric pressure Key on Engine Off 100 to 103 kPa at sea level
(15 to 16 psi) High Elevation Approx 5,000 feet 82 kPa Barometric Pressure Sensor (Voltage)
BARO Sensor Measures atmospheric pressure
Key on Engine Off 2.8 to 2.9 volts at sea level High Elevation Approx 5,000 feet 2.5 volts
Note: If BARO sensors reads approx 4.0 volts. Use kPa/psi comparison reading.
Manifold Absolute Pressure
MAP Sensor Measures absolute intake
manifold pressure Key on Engine off 2.8 to 2.9 volts at sea level High Elevation Approx 5,000 feet 2.5 volts
Engine Coolant Temperature Sensor
ECT Sensor (°F/°C) Measures engine coolant
temperature Key on Engine off (Engine Cold) Roughly matches ambient temperature Fuel Tank Pressure Sensor
FTP Sensor Measures charcoal canister
pressure Key on Engine off 2.45 to 2.55 volts
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Multiport Injected Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Fuel Trim (Correction Value)
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Long Term Fuel Trim
AF FB AVE (LT Fuel Trim) ECM/PCM Average Correction Value
The LTFT base setting is 1.00 Engine idling
(normal operating temp) .94 to 1.06 Normal Range Short Term Fuel Trim
AF FB (ST Fuel Trim) ECM/PCM Immediate Correction
Value
The STFT base setting is 1.00 Engine idling
(normal operating temp) .94 to 1.06 Normal Range
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Manifold Absolute Pressure
MAP Sensor Measures absolute intake manifold
pressure Engine idling (normal operating temp) .82 to .95 volts High Elevation Approx 5,000 feet .74 to .85 volts Mass Air Flow Sensor
MAF Sensor Measures air flow into the Engine 2500 RPM Test (+/- 30 RPM) Look in the SIS
troubleshooting for DTC P0171 to find spec Intake Air Temperature Sensor
IAT Sensor (1) Measures intake air temperature Engine idling (normal operating temp) 1.45 to 2.8 volts Engine Coolant Temperature Sensor
ECT Sensor Measures engine coolant
temperature Engine idling Normal operating temp. .45 - .60 volts EGR valve position Sensor
EGR VLS Measures the actual EGR pintle
position Engine idling (normal operating temp) 1.1 to 1.25 volts Secondary 02 Sensor
H02S2 Sensor Measures exhaust gas oxygen
content post catalytic converter Engine idling (normal operating temp) .60 to .70 volts
This is the target value for secondary 02
PGM-FI
Engine idling (normal operating temp)
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Air Fuel Ratio Sensor
A/F Sensor Measures exhaust gas oxygen pre-
catalytic converter
4 wire Sensor (Measures in milliamps)
The leaner the mixture (more oxygen) the current is negative.
Richer mixture (less oxygen) the current is positive.
5 Wire Sensor (Measures in milliamps)
The leaner the mixture (more oxygen) the current is positive.
Richer mixture (less oxygen) the current is negative.
Air/Fuel Lambda
A/F Lambda Calculated value of the air fuel ratio taken from the A/F Sensor
Lambda value of 1.00 means 14.7:1 air fuel ratio (Stoichiometric)
Lambda value greater than 1.00 means the mixture is lean (More O2) Lambda value less than 1.00 means the mixture is rich (Less O2)
Multiport Injected Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
PGM-FI (continued)
Engine idling (normal operating temp)
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Throttle Control
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Throttle Position Sensor
TP Sensor Calculated value of throttle valve
position taken from TP Sensor A
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .59 to .67 volts Accelerator Pedal Pressed 3.90 to 3.96 volts Relative Throttle Position
REL TP Sensor
A learned value based on throttle valve opening measured from fully closed position. Due to carbon accumulation, this value will increase over time.
Engine idling
(normal operating temp) Below 2.46° (degrees)
Accelerator Pedal Position Sensor APP Sensor
Calculated value of accelerator pedal travel displayed in percentage
Key on Engine off 0%
Engine idling
(normal operating temp) 0%
Accelerator Pedal Pressed 105% to 116%
Accelerator Pedal Position Sensor APP Sensor A
Under Dash APP Sensor A
Actual measurement of the pedal travel twice the voltage of APP Sensor B
Key on Engine off .96 to 1.06 volts Engine idling
(normal operating temp) .96 to 1.06 volts Accelerator Pedal Pressed 4.70 to 4.80 volts Accelerator Pedal Position Sensor
APP Sensor B
Under Dash APP Sensor B
Actual measurement of the pedal travel half the voltage of APP Sensor A
Key on Engine off .47 to .51 volts Engine idling
(normal operating temp) .47 to .51 volts Accelerator Pedal Pressed 2.35 to 2.39 volts Accelerator Pedal Position Sensor
APP Sensor A
Under Hood APP Sensor A
Actual measurement of the pedal travel twice the voltage of APP Sensor B
Key on Engine off .47 to .49 volts Engine idling
(normal operating temp) .47 to .49 volts Accelerator Pedal Pressed 4.46 to 4.68 volts
Multiport Injected Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
SENSOR/SIGNAL DESCRIPTION EXPECTED VALUES
Accelerator Pedal Position Sensor APP Sensor B
Under Hood APP Sensor B
Actual measurement of the pedal travel twice the voltage of APP Sensor A
Key on Engine off .18 to .24 volts Engine idling
(normal operating temp) .18 to .24 volts Accelerator Pedal Pressed 2.20 to 2.29 volts Throttle Position Sensor A
TP Sensor A Actual measurement of the throttle
valve movement
Key on Engine off .84 to .92 volts Engine idling
(normal operating temp) .61 to .69 volts Accelerator Pedal Pressed 3.92 to 3.96 volts Throttle Position Sensor B
TP Sensor B
Actual measurement of the throttle valve movement –redundancy check
Key on Engine off 1.67 to 1.74 volts Engine idling
(normal operating temp) 1.47 to 1.53 volts Accelerator Pedal Pressed 4.12 to 4.19 volts
Throttle Control (continued)
Multiport Injected Vehicles
Vehicles up to and including MY 2021.
NSX not incuded
Training Aid B
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
Training Aid C Reading Advanced Diagnostics and EWD Schematics
The schematics in the advanced diagnostics documents and in EWD’s may have symbols that you are not used to seeing. This job aid describes the most common ones that you’ll see in these materials. For further assistance in identifying electrical symbols, search SIS - Technical Library under the ETM’s/
EWD Publication. The” EWD Main Electrical Symbol Definitions” identifies most basic EWD symbols.
SYMBOL ABBREVIATION DESCRIPTION
VCC A horizontal line with a hollow dot is used to indicate a 5-volt power source for the sensor.
It will be labeled with some variation of “VCC”. Commonly Used EWD Circuit Names For Powertrain Circuits describes it as “Sensor Voltage Supply”.
IG1 A horizontal line with a solid dot is used to indicate a 12-volt power source. These are used in VTEC and MAF as well as automatic transmission circuits
SG This is where the sensor grounds. It will be labeled with some variation of “SG”. Commonly Used EWD Circuit Names For Powertrain Circuits describes it as “Signal ground”.
Pull-Up Resistor: Connects to 5 volt power source inside the PCM. In the diagram on the left, a resistor inside the PCM is connected to 5 volt power source (pull-up resistor). If the input line is open, the resistor will pull up the input voltage to 5 volts. Without the pull-up circuit, an open on the input line would result in a random voltage reading because of internal feedback in the PCM and the fault would not be recognized.
Pull-Down Resistor: Connects to ground inside the PCM In the diagram on the left, a resistor inside the PCM is connected to ground (pull-down resistor). If the input line is open, the resistor will pull down the input voltage to zero. Without the pull-down circuit, an open on the input line would result in a random voltage reading because of internal feedback in the PCM and the fault would not be recognized.
An S shaped line is used to indicate there’s more to the circuit than what is being shown.
For an input circuit, this is where the PCM receives the input from the sensor. You can imagine that this is where the internal volt meter is located inside the PCM.
“Pull-up”
“Pull-down”
FBS13 – Sensor Range/Performance Troubleshooting
Automobile Technical Training
ECT,IAT,TA,TW Negative Temperature Coefficient (NTC) Thermistor changes resistance based on
temperature. As temperature increases, resistance decreases. As temperature decreases, resistance increases.
EGR VLS, APP, APS, TP,
THL, DCWGL A position sensor that changes voltage with movement.
FTP, MAP, FRP, P3, PA, PB,
PF A pressure sensor that changes voltage with changes in pressure.
For further definitions and abbreviations, please see “Commonly Used EWD Circuit Names for Powertrain Circuits”
