Cat.dcs.Sis.controller

(1)

INTERACTIVE SCHEMATIC

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Cover Page

Information

Schematic

Machine Views

Component Table

Tap Table

Fluid Power Symbols

Electrical Symbols

Front Frame

Rear Frame

Tap Views

Features

Options

Bookmarks

X

EC-C3

EC-C2

_E-C60

EC-C1

E-C61

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(2)

Electrical System

320D Excavator

2011 Caterpillar, All Rights Reserved

Printed in U.S.A.

©

KENR6118-05

October 2011

A6F1-UP

A8F1-UP

A9F1-UP

KGF1-UP

KTF1-UP

MGG1-UP

MCH1-UP

FAL1-UP

PCM1-UP

BZP1-UP

PHX1-UP

JFZ1-UP

KHN1-UP

(3)

Page 1 of 2

COMPONENT LOCATION

Component

Schematic

_Location

Machine

Component

Schematic

_Location

Machine

_Location

A/C Unit

K-9

C-1

Sensor - Atch Viscus Clutch Temp

L-14

B-40

Air Heater

F-18

A-1

Sensor - Atch Wtr Separator Lvl 2

K-14

B-41

Alarm - Action

F-2

C-2

Sensor - Eng Speed Pickup

E-18

A-4

Alarm - Atch Travel

A-16

B-2

Sensor - Fuel Level

A-15

B-15

Alternator

D-18

B-1

Sensor - Pump 1 Press.

A-18

B-16

Atch Air Suspension

L-4

C-7

Sensor - Pump 2 Press.

A-18

B-17

Battery - Atch Front

F-17

D-1

Solenoid - A/C Clutch

D-18

B-20

Battery - Atch Rear

F-18

D-2

Solenoid - Atch 1p 2p Change 1 (Sol 2)

B-18

B-21

Battery - Front

F-17

D-4

Solenoid - Atch 1p 2p Change 2 (Sol 3)

B-18

B-22

Battery - Rear

F-18

D-5

Solenoid - Atch 1way/2way Change

B-9

B-49

Block - As

G-12

D-6

Solenoid - Atch Boom Up

L-9

C-54

Block - Gp

F-18

D-7

Solenoid - Atch Bucket Lock

L-9

C-53

Breaker - Alt

H-11

D-8

Solenoid - Atch Double Action (Sol 3)

B-18

B-23

Breaker - Heater

H-11

D-9

Solenoid - Atch Fine Swing

A-9

A-12

Breaker - Main

H-11

D-10

Solenoid - Atch Flow Limit

A-18

B-24

Bus Bar

H-11

D-3

Solenoid - Atch Heavy Lift

A-12

A-11

Coil - Atch Exciter

J-1

C-12

Solenoid - Atch Quick Coupler

J-15

B-25

Control - Engine

K-18

A-19

Solenoid - Atch Relief 1

B-11

B-48

Control - Machine

F-11

D-14

Solenoid - Atch Relief 1 Check

B-11

B-47

Control - PLJ

K-18

D-17

Solenoid - Atch Relief 2

B-9

B-50

Control - Product Link

L-17

D-12

Solenoid - Atch Relief 2 Check

B-9

B-51

Control - Wiper

D-2

C-88

Solenoid - Atch Single Action (1)

B-9

B-18

Converter - Atch 12V 7A (1)

K-4

C-4

Solenoid - Atch Single Action (2)

B-9

B-19

Solenoid - Atch Stem 1 Extend

A-17

B-42

Converter - Radio

C-8

C-38

Solenoid - Atch Stem 1 Retract

A-17

B-43

Diode - ACC

J-5

C-22

Solenoid - Atch Stem 2 Extend

A-17

B-44

Diode - Alternator

G-6

C-31

Solenoid - Atch Stem 2 Retract

B-17

B-45

Diode - Hyd Lock

K-5

C-23

Solenoid - Atch Stem 3 Extend

D-16

B-52

Diode - Lamp

G-9

C-24

Solenoid - Atch Stem 3 Retract

D-16

B-53

Diode - Main Relay

C-9

C-25

Solenoid - Atch Stick Out Stop

L-9

C-55

Diode - Start Relay

H-12

D-13

Solenoid - Atch Viscus Clutch

L-13

B-39

Diode-1

K-9

C-26

Solenoid - Hyd Lock

A-12

A-13

Diode-2

K-9

C-27

Solenoid - Power Shift Press.

A-18

B-26

Diode-3

K-9

C-28

Solenoid - Swing Brake

A-12

A-14

Fuse Base

F-8

C-30

Solenoid - Travel Speed

A-12

A-15

Indicator Unit

I-1

C-32

Solenoid - Travel Straight

A-12

B-27

Joystick - Atch LH

L-3

C-13

Switch - Air Cleaner

K-14

A-16

Joystick - Atch RH

J-1

C-15

Switch - Atch Aux Pump Press. (Stem 4)

L-1

C-58

Joystick - Atch RH (3 Sw)

J-1

C-16

Switch - Atch Boom Raise Press.

B-12

B-29

Joystick- Atch LH (3 Sw)

L-3

C-14

Switch - Atch Bucket Ex Press.

B-12

B-28

Keyreader - Atch Mss

J-2

C-17

Switch - Atch Backup Crane

H-1

C-59

Meter - Atch Boom Potentio

B-9

B-7

Switch - Atch Crane Cancel

B-5

C-60

Meter - Atch Stick Potentio

C-9

A-6

Switch - Atch Fine Swing Cont

B-2

C-61

Meter - Service

E-1

C-33

Switch - Atch Foot

L-1

C-62

Monitor

F-1

C-34

Switch - Atch Hammer Return Filter

I-15

D-22

Motor - Atch Lower Washer

G-11

D-15

Switch - Atch High Press. (Stem 1)

K-1

C-63

Motor - Atch Lower Wiper

L-1

C-36

Switch - Atch Leveling

B-1

C-64

Motor - Starter

E-18

B-8

Switch - Atch Lower Washer

B-3

C-65

Motor - Washer

G-11

D-16

Switch - Atch Lower Wiper

B-2

C-66

Motor - Wiper

E-2

C-37

Switch - Atch Medium Press. (Stem 3)

L-1

C-67

Pedal - Atch Aux LH

L-1

C-8

Switch - Atch Over Load Warning

B-4

C-68

Radio - Prod Link 2nd Generation

J-16

D-11

Switch - Atch Quick Coupler

D-1

C-69

Switch - Atch Radio Mute

B-2

C-70

(4)

Page 2 of 2

COMPONENT LOCATION

Component

Schematic

_Location

Machine

Component

Schematic

_Location

Machine

Relay - Atch Beacon

E-9

C-47

Relay - Atch Caution Lamp

F-10

C-40

Switch - Atch Refueling Start

A-6

B-37

Relay - Atch Single

F-10

C-41

Switch - Atch Refueling Stop

A-6

B-36

Relay - Boom Lamp

G-9

C-42

Switch - Atch Seat Heater

B-4

C-71

Relay - Cab Lamp

F-9

C-44

Switch - Atch Smart Boom Select

B-3

C-72

Relay - Chas Lamp

F-9

C-43

Switch - Atch Travel Straight Press.

K-1

C-73

Switch - Atch Under Window Limit

E-2

C-74

Relay - Horn

F-9

C-45

Switch - Backup EPR Valve

I-3

C-75

Relay - Main

C-10

C-46

Switch - Backup Gov

I-3

C-76

Relay - Neutral Start

F-9

C-50

Switch - Coolant Level

L-14

A-17

Relay - Start

H-12

D-19

Switch - Disconnect

G-12

D-23

Relay - Start Cont

G-8

C-48

Switch - Eng Oil Level

D-18

B-32

Relay - Travel Alarm

E-9

C-39

Switch - Horn

L-3

C-77

Resistor

C-3

C-51

Switch - Hyd Oil Filter

A-16

B-34

Resistor - 2

D-6

C-52

Switch - Hyd Oil Level

A-16

B-35

Resistor - Atch Backup

F-10

C-9

Switch - Implement Press.

K-4

C-78

Resistor - Backup

G-8

C-20

Switch - Key

I-1

C-79

Resistor - Can 1

C-11

D-20

Switch - Neutral Start Limit

L-3

C-80

Resistor - Can 1 PLJ

C-10

D-18

Switch - One Touch Low Idle

J-2

C-81

Resistor - Can 2

C-11

D-21

Switch - Panel

E-2

C-82

Sender- Hyd Temp

A-16

B-13

Switch - Secondary Shutdown

H-10

C-83

Sensor - Atch Boom Cyl Head Press.

C-9

A-8

Switch - Throttle Position

I-1

C-84

Sensor - Atch Boom Cyl Rod Press.

C-9

A-9

Switch - Travel L Press.

K-2

C-85

Sensor - Atch O.L.W.D. Press.

A-9

A-10

Switch - Travel R Press.

K-2

C-86

Sensor - Atch Squeeze Press.

B-11

B-46

Timer - Atch Lamp Delay

D-10

C-87

A = See Area A

B = See Area B

C = See Area C

D = See Area D

(5)

CONNECTOR LOCATION

Connector Number

Schematic

_Location

Machine

CONN 1

L-15, L-18

12D

CONN 2

C-15, C-16

7B

CONN 3

K-16, L-15, J-16, L-16

26D

CONN 4

J-15, K-16

23D

CONN 5 Serial Service Connector

L-15

25D

CONN 6

E-15

9B

CONN 7

D-15

1B

CONN 8

C-15, D-15

36B

CONN 9

C-15

47B

CONN 10

C-15

6B

CONN 11

A-15

22B

CONN 12

I-14

14D

CONN 13

J-14

16D

CONN 14

L-14

43B

CONN 15

A-12

9A

CONN 16

L-11

2D

CONN 17

K-11

4D

CONN 18

J-11

1C

CONN 19

J-11

5D

CONN 20

I-11

13D

CONN 21

I-12

11D

CONN 22

I-12

128C

CONN 23

H-12

7D

CONN 24

C-11

22D

CONN 25

A-10

4A

CONN 26

C-9

19B

CONN 27

D-10

70C

CONN 28

H-9

14C

CONN 29

A-8

16B

CONN 30

A-8

14B

CONN 31

B-8

6A

CONN 32

B-8, C-8

13B

CONN 33

G-8

97C

CONN 34

H-8

3C

CONN 35

H-8

18C

CONN 36

H-7

19C

CONN 37

F-7

80C

CONN 38

F-7

96C

CONN 39

C-6

91C

CONN 40

A-6

40B

CONN 41

A-6

41B

CONN 42 ET Connector

D-6

68C

CONN 43

H-6

24C

CONN 44

H-6

20C

CONN 45

H-5

2C

CONN 46

H-5

99C

CONN 47

L-5

26C

CONN 48

L-5

17C

CONN 49

J-4, J-5

29C

CONN 50

B-5

54C

CONN 51

H-4

105C

CONN 52

I-4, J-5, J-6

23C

CONN 53

I-4

35C

CONN 54

J-4

30C

CONN 55

J-4

21C

CONN 56

C-2

127C

CONN 57

I-2

117C

CONN 58

C-1

90C

A = See Area

A

B = See Area

B

C = See Area

C

D = See Area

D

CONN 59

L-16

26D

CONN 60

H-16

19A

CONN 62

J-7

19C

CONN 63

E-7

80C

CONN 64

E-7

96C

CONN 65

G-17

2B

(6)

CID / MID / FMI

Component Identifiers (CID¹)

Module Identifier (MID²)

Engine Control

(MID No. 036)

CID

Component

0001 Cylinder #1 Injector 0002 Cylinder #2 Injector 0003 Cylinder #3 Injector 0004 Cylinder #4 Injector 0005 Cylinder #5 Injector 0006 Cylinder #6 Injector 0041 8 Volt DC Supply

0095 Fuel Filter Differrential Pressure Sensor 0100 Engine Oil Pressure Sensor 0110 Engine Coolant Temperature Sensor 0168 Electrical System Voltage 0172 Intake Manifold Air Temperature Sensor 0174 Fuel Temperature Sensor 0190 Engine Speed Sensor 0253 Personality Module 0261 Engine Timing Calibration 0262 5 Volt Sensor DC Power Supply 0268 Programmed Parameter Fault 0342 Secondary Engine Speed Sensor 0460 Fuel Pressure Sensor After Fuel Filter 0617 Inlet Air Heater Relay

1779 Fuel Rail #1 Pressure Valve Solenoid 1785 Intake Manifold Pressure Sensor 1797 Fuel Rail Pressure Sensor 1834 Ignition Key Switch 2417 Start Aid Current

Machine Control

(MID No. 039)

CID

Component

0041 8v Sensor Supply 0096 Fuel Level Sensor 0127 Transmission Pressure Sensor 0191 Transmission Output Speed Sensor 0262 5v Sensor Supply

0268 Programmed Parameter 0298 Brake Ped Lim Sw 0370 Boom Float Solenoid 0374 Swing Brake Solenoid 0444 Start Relay 0590 Engine Control

0600 Hydraulic Oil Temperature Sensor 0726 Right Steering Solenoid 0727 Left Steering Solenoid 0735 Heavy Lift Solenoid 0882 Implement Lockout Solenoid 1130 Left Attachment Pedal Position Sensor 1326 ECM Location Code

1401 Transmission Solenoid 1 1402 Transmission Solenoid 2 1482 10v Sensor Supply 1530 Quick Coupler Solenoid 1558 Electronic Implement Control #2 1615 One Way / Two Way Valve Solenoid 1617 Oscillating Axle Solenoid 1621 Generator Valve Solenoid 1622 Travel Lock Magnet 1628 Arm Rest Switch

1629 Main Pump Power Shift Pres Solenoid 1630 Swing Pump Sol

1657 Left Joystick Thumbwheel 1658 Right Joystick Thumbwheel 1960 Ignition Key Reader 2110 Machine Pitch Sensor

2104 Travel Motor Swash Plate Angle Limit Solenoid 2210 Right Joystick Thumbwheel

2129 Ride Control Solenoid 2142 Straight Travel Pedal Position Sensor 2149 Travel Pilot Pressure Solenoid

2184 Medium Pressure Hydraulic Circuit Port B Solenoid 2185 Medium Pressure Hydraulic Circuit Port A Solenoid 2213 Auxiliary Valve #2 Port B Solenoid

2214 Auxiliary Valve #2 Port A Solenoid 2256 Hydraulic Modulation Solenoid 2447 Travel Motor Bypass Solenoid 2543 Joystick Steering Enable Switch 2544 Offset Boom Offset Left Solenoid 2545 Offset Boom Offset Right Solenoid 2546 Hydraulic Cab Riser Raise Solenoid 2547 Hydraulic Cab Riser Lower Solenoid 2592 Auxiliary Valve Port A Flow Solenoid 2593 Auxiliary Valve Port B Flow Solenoid 2594 Hammer Solenoid

2599 Auxiliary Valve Port A Line Relief Solenoid 2600 Auxiliary Valve Port B Line Relief Solenoid 2649 Auxiliary Valve Load Sensing Solenoid 2665 Boom Float Down Solenoid 2666 Offset Boom Enable Switch 2667 Limp Home Sw

2668 Hydraulic Cab Riser Enable Switch ¹ The CID is a diagnostic code that indicates which circuit is faulty. ² The MID is a diagnostic code that indicates which electronic control module diagnosed the fault.

Failure Mode Identifiers (FMI)¹

FMI No.

Failure Description

0 Data valid but above normal operational range.

1 Data valid but below normal operational range.

2 Data erratic, intermittent, or incorrect.

3 Voltage above normal or shorted high.

4 Voltage below normal or shorted low.

5 Current below normal or open circuit.

6 Current above normal or grounded circuit.

7 Mechanical system not responding properly.

8 Abnormal frequency, pulse width, or period.

9 Abnormal update.

10 Abnormal rate of change.

11 Failure mode not identifiable.

12 Bad device or component.

13 Out of calibration.

14 Parameter failures.

15 Parameter failures.

16 Parameter not available.

17 Module not responding.

18 Sensor supply fault.

19 Condition not met.

20 Parameter failures.

¹The FMI is a diagnostic code that indicates what type of failure has occurred.

Event Codes

Engine Control

Event Code

Condition

E096

High Fuel Pressure

E198

Low Fuel Pressure

E265

User Defined Shutdown

E360

Low Engine Oil Pressure

E361

High Engine Coolant Temperature

E362

Engine Overspeed

E363

High Fuel Temperature

E390

Fuel Filter Restriction

E396

High Fuel Rail Pressure

E398

Low Fuel Rail Pressure

E539

High Intake Manifold Air Temperature

E1044

High Intake Manifold Pressure

E1045

Low Intake Manifold Pressure

(7)

SPECIFICATIONS AND RELATED MANUALS

Related Electrical Service Manuals

Title

Form Number

Alternator

212-8561

SENR2143

Engine Control:

KENR5442

Machine Control:

RENR9848

Off Machine Switch Specification

Part No.

Function

Actuate

Deactuate

Contact Position

106-0179

Bucket Extend Pressure

1520 ± 98 kPa

_{(220 ± 14 psi)}

1127 kPa MIN

_{(163 psi)}

Normally Open

154-0498

Air Cleaner

635 ± 58 mm H2O

-

Normally Open

167-3466

Aux Pump Pressure

Medium Pressure

Travel Left Pressure

Travel Right Pressure

High Pressure

Travel Straight Pressure

Implement Pressure

Boom Raise Pressure

Boom Down Pressure

490 ± 49 kPa

(71.07 ± 7.11 psi)

290 kPa MIN

(42.06 psi)

Normally Open

202-9002

Boom Up/Down Pressure

_{(1998.6 psi MAX)}

13780 kPa MAX

10335 ± 689 kPa

_{(1499 ± 100 psi)}

Normally Closed

Resistor, Sender and Solenoid Specifications

Part No.

Component Description

Resistance (Ohms)¹

102-8016

Resistor:

Backup

47 ± 5%

111-9916

Solenoid:

Flow Limit

Power Shift Pressure

Stem 1 Extend

Stem 1 Retract

Stem 2 Extend

Stem 2 Retract

Stem 3 Extend

Stem 3 Retract

Bucket Lock

11.7 ± 1.2

121-1491

Solenoid:

1P / 2P Change 1

1P / 2P Change 2

Double Action

Travel Straight

Travel Speed

Swing Brake

Hydraulic Lock

Universal Quick Coupler High

Universal Quick Coupler Low

32 ± 3.2

126-2941

Resistor:

Backup

Positions 1,2,3,4 = 25 ± 5%

163-6700

Sender:

Fuel Level

50% - 33.8 ± 2.0

0% - 83.5 ± 1.5

100% - 8.0 +1.0 -0.5

174-3016

Resistor:

CAN 1

CAN 2

CAN 1 PLJ

Resistor

Resistor 2

120 ± 10%

234-4460

Solenoid:

Fine Swing

34 ± 0.5

244-8506

Solenoid:

Relief 1

19.5 ± 2

260-3877

Solenoid:

Quick Coupler

26.96 ± 1.6

4I-5394

Sender:

Hydraulic Oil Temperature

6134 to 7496

(8)

Page 1 of 2

WIRE DESCRIPTION

Wire

Number

Color

Wire

Description

Number

Wire

Color

Wire

Description

Power Circuits

Lighting Circuits

101 RD

Bat (+)

603 PK

Rotary Beacon

103 RD

Aux Ckt

607 PK

Flood Lamp - Front

105 RD

Key Sw

615 YL

Cab Flood Lamp/ROPS

108 RD

Heater Relay

616 BU

Bucket Flood Lamp/Boom Flood Lamp

109 RD

Alt Output (+) Term.

638 WH

Rotary Beacon

112 PU

Main Power Rly Output

645 RD

Headlamp Relay

113 OR

Radio

646 RD

Light Sw To Front Flood Relay

114 RD

Warning Horn (forward)

684 RD

Cab Flood Lamp

115 RD

Cab Lamp Relay

A623

BU

Right Cab Flood Lamp Sw To Relay

117 RD

12V Power Converter

Control Circuits

118 GY

Wiper Control

763 BU

Travel Speed Solenoid

119 PK

Alternator Diode

779 WH

Universal Quick Coupler Solenoid (Low)

120 YL

12V 7A Converter 1

780 PU

Universal Quick Coupler Solenoid (High)

123 WH

Seat Heater

788 YL

Engine Speed (-)

124 GN

A/C

789 RD

Hydraulic Lock

127 OR

Air Suspension

A755

PK

Throttle Sw #1

129 BU

Cigar Lighter

A756

BU

Throttle Sw #2

130 RD

Engine Control

A757

GY

Throttle Sw #3

135 BU

Converter 12V Memory Out

A758

BR

Throttle Sw #4

139 OR

Converter 24V Switched In

A760

GY

Machine Control +5v Supply

141 RD

Unused

A762

PU

Engine Speed (+)

142 RD

Unused

A768

BU

Backup EPR Valve Sw to Power Shift Pressure Solenoid

143 BR

Caution Lamp Relay

A769

GY

Backup EPR Valve Sw to Power Shift Pressure Solenoid

147 PU

Switch Power

A770

PK

Backup EPR Valve Sw to Backup Resistor

149 RD

Boom Lamp Relay

E787

PK

Bucket Lock Solenoid

152 BU

Under Window Limit Switch

F716

WH

Secondary Shutdown Sw

154 RD

Neutral Start Relay to Neutral Start Limit Sw

F772

WH

Crane Backup Sw

160 PU

Chassis Lamp Relay

F773

OR

Backup Governor Accel

165 YL

Caution Lamp Relay

F774

WH

Backup Governor Decel

168 RD

Refueling System Power

G723

YL

Heavy Lift Solenoid

169 PK

Backup EPR Valve Sw

H746

YL

Viscous Clutch Solenoid (+)

172 RD

Heater Relay / Product Link Radio and ECM

H747

BR

Viscous Clutch Solenoid (-)

175 RD

A/C Unit

H792

BR

Smart Boom Up/Down Relay to Boom Up/Down Pressure Sw

177 RD

Main Brkr

K776

GN

Alternator L Terminal to Start Control Relay

179 BU

12V 7A Converter 2

M736

BU

Governor Command

180 GN

Boom Float Disable Relay

M737

WH

Flow Limit Solenoid

184 RD

Machine ECM

M739

YL

Flow Limit Solenoid

188 WH

Radio

M740

PK

Travel Straight Solenoid

189 RD

Hydraulic Lock

M743

GN

Boom Float Disable Relay

199 OR

Action Alarm / Beacon Relay

M744

WH

Smart Boom Select Sw

Ground Circuits

M745

GY

Boom Check Solenoid 1 / Boom Down Pressure Sw

200 BK

Main Chassis

M746

YL

Smart Boom Select Sw

210 BK

Converter Output (24/12 Volt)

M747

BU

Smart Boom Select Sw

229 BK

12V 7A Socket B

M748

BR

Boom Bown Pressure Sw / Boom Down Line Cutoff Solenoid

235 BK

Machine Control Ground

M749

PK

Boom Check Solenoid 2 / Boom Up/Down Pressure Sw

A209

BK

Machine ECM Analog Return

M751

YL

Crane Cancel Sw

A250

BK

Engine Control Ground

M755

OR

Bucket Extend Pressure Sw

Basic Machine Circuits

N789

BU

Viscous Clutch Temp Sensor

304 WH

Starter Relay to Starter Motor

N793

GN

Foot Pedal Sw

306 GN

Start Relay Coil to Neutral Start Relay

N794

GY

Aux Pedal-LH

307 OR

Key Sw To Neutral Start Relay

N795

WH

Aux Pedal-RH

308 YL

Main Power Relay Coil

R725

WH

Not Used

309 GY

Alternator Regulator Term.

T725

WH

Not Used

310 PU

Engine Control to Heater Relay

X738

PK

Hammer Return Filter Sw

320 RD

Horn Relay Coil To Sw

X794

BU

Stick Out Stop Solenoid

321 BR

Travel Alarm

877 YL

Heater Relay

322 GY

Warning Horn (forward)

892 BR

Cat Data Link (-)

323 WH

Fuel Pump Power

893 GN

Cat Data Link (+)

325 PK

Fuel Pump Relay Cut-out

F889

WH

Engine Speed Command

326 RD

Key Sw 'C' Term.

G834

PU

Viscous Clutch Fan Speed +

329 YL

Refueling Pwr Rly to Refueling Stop Rly

K843

GN

RH Joystick Upper Sw

330 YL

Start Relay to Start Control Relay

331 OR

Travel Alarm Relay

365 YL

Refueling Stop Sw to Refueling Stop Relay

E564

PK

Quick Coupler Relays

E565

BU

QC Sw to QC Relay 2

(9)

Page 2 of 2

WIRE DESCRIPTION

Wire

Number

Color

Wire

Description

Wire

Color

Wire

Description

K844

GY

LH Joystick Upper Sw

K847

PU

RH Joystick Smart Boom Sw

K848

WH

LH Joystick Fore Sw

Monitoring Circuits

K849

YL

Att Stem 1

251 YL

CAN 1 Data Link (+)

K850

BR

Att Stem 2

252 YL

CAN 2 Data Link (+)

K851

BU

Att Stem 3

261 GN

CAN 1 Data Link (-)

K852

GN

Att Stem 4

262 GN

CAN 2 Data Link (-)

K856

PU

Stem 1 Control Valve A

403 GN

Alternator (R) Term.

K857

WH

Stem 2 Control Valve A

405 GY

Engine Oil Pressure

K858

YL

Stem 3 Control Valve A

410 WH

Action Alarm

K859

BR

Stem 4 Control Valve A

412 BU

Coolant Level

K860

BU

Stem 1 Control Valve B

430 BU

Air Cleaner Sw

K861

GN

Stem 2 Control Valve B

487 OR

Hyd Oil Filter Sw

K862

GY

Stem 3 Control Valve B

491 PK

Hyd Oil Temp Sender

K863

OR

Stem 4 Control Valve B

495 GN

Fuel Level Signal

K864

PK

Relief Solenoid 1

496 WH

Hyd Oil Level

K865

PU

Relief Solenoid 2

C468

BU

Engine Oil Level

K866

WH

Att 1-way / 2-way Control Valve

E411

YL

Boom Cylinder Rod End Pressure

K868

BR

Stem 1/2 Extend/Retract Solenoids

E441

GN

Boom Angle Sensor

K869

BU

Stem 3 Extend/Retract Solenoids

E442

GN

Stick Angle Sensor

K871

WH

1P / 2P Change Solenoids

E472

GN

Machine ECM 8v Sensor Supply

K872

OR

Single Action Solenoids 1 / 2

E473

GY

RH Thumb Wheel

K876

BR

Relief 1 Check Solenoid

E474

OR

LH Thumb Wheel

K877

BU

Relief 2 Check Solenoid

E480

PK

Overload Warning Switch

K879

GN

Double Action Solenoid

H446

PK

Overload Warning Pressure Sensor

L885

BU

Not Used

H473

BR

Travel Straight Pressure Switch

L886

BU

Not Used

H474

GN

Travel Right Pressure Switch

936 PU

Backup Resistor to Diode 3

H475

BU

Travel Left Pressure Switch

998 BR

Backup Governor Sw

H476

WH

Joystick Pressure Switch

E997

RD

Hydraulic Lock Diode

Accessory Circuits

G973

OR

Boom Raise Pressure Sw

501 GN

Wiper - Front (low)

G976

BU

Water Separator Level Sensor

506 PU

Washer - Front

K904

GN

Pump 1 Pressure Sensor

508 PU

Radio Speaker - Left

K906

GN

Swing Brake Solenoid

509 WH

Radio Speaker - Left (commom)

K907

BU

Backup EPR Valve Sw

511 BR

Radio Speaker - Right

K931

GN

Backup Resistor to Diode 2

512 GN

Radio Speaker - Right (common)

K950

YL

Boom Up Limit PRV

530 OR

Washer Right

K952

BR

Boom Up Solenoid to Backup Crane Sw

535 BU

Sw To Wiper Sw

L968

OR

Bachup EPR Valve Sw

575 YL

Wiper - Aux (Park)

L969

WH

PS Pressure

576 PK

Wiper - Aux (Low)

L972

BU

One Touch Low Idle Sw

578 BU

Washer - Aux

L973

GN

Fine Swing Cont Sw to Fine Swing Solenoid

590 GY

Wiper Sw To Intermittent Module

L976

GN

Refueling Start Switch (N.O.)

592 BU

DC/DC Converter Power Output

L978

GY

Level Sw to Leveling Solenoid

A513

RD

DC/DC Converter Memory Output

M906

BU

Squeze Pressure Sensor

A537

PK

Seat Heater

N957

PK

Product Link RS232 Rxd - Comm #1

A549

BU

Backup Resistor to Diode 1

N959

PK

Product Link RS232 Rxd - Comm #3

A579

OR

Wiper Motor +

N960

OR

Product Link RS232 Txd - Comm #1

A580

BR

Wiper Motor

-N963

OR

Product Link RS232 Txd - Comm #3

A581

GN

Wiper Motor Reverse

N970

YL

Product Link RS232 Dtr - Comm #1

A582

PU

Wiper Motor Stop

N973

BR

Product Link RS232 Dcd - Comm #1

A584

BU

Front Window Limit Sw To Wiper Cont

N979

GN

Product Link RS232 Signal Gnd - Comm #1

A586

OR

Wiper Sw To Wiper Cont

N981

GN

Product Link RS232 Signal Gnd - Comm #3

A588

GN

Hyd Lock Sw to Hyd Lock Solenoid

T901

YL

MSS Exciter Coil In

C560

OR

Left Rear Speaker

T902

PK

MSS Exciter Coil Out

C566

PK

Left Rear Speaker (common)

T967

YL

Pump Pressure Sensor 2

C569

YL

Converter 2 12V Switched Out

E554

PK

A/C Controller To A/C Compressor Clutch

E562

PU

Quick Coupler Sw

(10)

HARNESS and WIRE

Electrical Schematic Symbols

©

1

2 AG-C4

111-7898

L-C12

3E-5179

9X-1123

Component

Part Number

Pin or Socket Number

Part Number: for

Connector Receptacle

Part Number: for

Connector Plug

Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)

Plug

325-AG135 PK-14

Wire Color

Wire Gauge

Receptacle

Pressure

Symbol

T

Temperature

Symbol

Level

Symbol

Flow

Symbol

Circuit Breaker

Symbol

Harness and Wire Symbols

1

2

2 Sure-Seal connector: Typical representation

of a Sure-Seal connector. The plug and receptacle

contain both pins and sockets.

Deutsch connector: Typical representation

of a Deutsch connector. The plug contains all

sockets and the receptacle contains all pins.

Symbols

Symbols and Definitions

Fuse (5 Amps)

5A

T

Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it.

Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has

screw terminals and a wire can be disconnected from it.

Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be

disconnected from the component.

Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.

Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the

machine.

Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it

opens the contacts of a normally closed reed switch.

Sender: A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its

resistance changes to give an indication to the gauge of the temperature or pressure.

Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet

when current flows through it. The electromagnet can open or close the switch part of the relay.

Solenoid: A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current

flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a

permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an

internal switch that places the latch coil circuit open at the time the coil latches.