UENR6467-02 February 2016
Harness And Wire Electrical Schematic Symbols Symbols
T
Pressure Symbol
Temperature Symbol
Level Symbol
Circuit Breaker Symbol
Flow Symbol
Symbols and Definitions Fuse: Acomponentin anelectricalcircuitthatwillopenthecircuitiftoomuchcurrentflows throughit. Switch (Normally Open): Aswitch that will close at a specified point (temp, press,etc.). The circleindicatesthatthecomponenthasscrewterminalsanda wirecanbedisconnecte dfromit. Switch (Normally Closed): Aswitch that will open at a specified point (temp, press, etc.). Nocircleindicatesthatthewirecannotbedisconnectedfromthecomponent. Ground (Wired): Thisindicatesthatthecomponentisconnectedtoa groundedwire.The groundedwireisfastenedtothemachine. Ground (Case): Thisindicate sthatthecomponentdoesnothaveawireconnectedtoground. Itisgroundedbybeingfastenedtothemachine.
16M3 and 18M3 Motor Grader Electrical System
Reed Switch: Aswitchwhosecontactsarecontrolledbya magnet. Amagnetclosesthe contactsofa normallyopenreedswitch;itopensthecontactsofanormallyclosedreedswitc h. Sender: Acomponentthatisusedwitha tempera tureorpressure gauge.Thesender measures the temperature or pressure. Its resistance changes to give an indication to thegaugeofthetemperatureorpressure.
T
16M3: E9Y1-UP
18M3: E9W1-UP
Relay (Magnetic Switch): Arelay is an electricalcomponent that isactivated by electricity. Ithasa coilthatmakesanelectromagnetwhencurre ntflowsthroughit.The electro magnetcanopenor closetheswitchpartoftherelay. Solenoid: Asolenoidisanelectricalcomponentthatisactivate dbyelectricity. Ithasa coilthatmakesanelectromagnetwhencurre ntflowsthroughit. The electro magnet canopenorcloseavalveor moveapieceofmetalthatcando work. MagneticLatchSolenoid: Amagneticlatchsolenoidisanelectricalcomponentthatis activatedbyelectricity andheldlatchedbya permanentmagnet.Ithastwocoils(latchandunlatch) thatmakeelectro magnetwhencurrentflowsthroughthem.Italsohasaninternalswitchthatplaces thelatchcoilcircuitopenatthetimethecoillatches.
Harness and Wire Symbols
262
259
263
264
260
265
266
261
Wire, Cable, or Harness Assembly Identification: Includes HarnessIdentification Lettersand Harnes s Connector Serialization Codes(seesample).
267
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
AG-C4 111-7898
253
L-C12 3E-5179
L-C12 3E-5179
1
Part Number: forConnectorPlug
Harness Connector Serialization Code: The"C"standsfor "Connector"and the number indicateswhichconnectorin the harness (C1, C2, C3, ...).
Part Number: forConnectorReceptacle
2 Plug
Volume 4 of 4: Engine
CONN 80 © 2016 Caterpillar, All Rights Reserved
CONN 81
1 2
Deutsch connector: Typicalrepresentation ofaDeutschconnector.Theplugcontainsall socketsandthereceptaclecontainsall pins.
1 2
Sure-Sealconnector: Typicalrepresentation ofaSure-Sealconnector.Theplugandreceptacle containbothpinsandsockets.
Receptacle Pin or Socket Number
5A 9X-1123
Fuse (5Amps)
Component PartNumber
325-AG135 PK-14 Harness identification code: Thisexampleindicateswiregroup 325, wire135in harness"AG".
WireGauge WireColor
Printed in U.S.A.
252 Component Location
251
Component
Schematic Location
Machine Location
Control - ECM
G-5
Resistor - Engine Can
C-3
Sensor -Barometric Pressure
D-1
252
Sensor - Coolant Temp
A-4
253
Sensor -Engine OilP ressure
D-1
254
Sensor -Engine Speed (CAM)
250 251
F-1
255
Sensor -Engine Speed (Crank)
F-1
256
Sens or - Int ake Manifold Pres sure
D-1
257
Sensor -Intake Manifold Temp
F-1
258
Solenoid - Brake 1 & 2
A-4
259
Solenoid - Brake 3 & 4
A-4
260
Solenoid - Brake 5 & 6
A-4
261
Solenoid - Injector 1
B-4
262
Solenoid - Injector 2
B-4
263
Solenoid - Injector 3
B-4
264
Solenoid - Injector 4
B-4
265
Solenoid - Injector 5
A-4
266
Solenoid - Injector 6
A-4
267
) s e h c n i 4 2 x s e h c n i 4 3 : s n o i s n e m i D (
255 Connector Location
256
CONN 20
Schematic Location E-2
CONN 80
B-5, G-2
CONN 81
A-5, F-2
Connector Number
257
258
254
CONN 82 (TDC Probe)
CONN 82
E-2
Theconnectorsshownin thischartare forharness toharnessconnectors.Connectorsthat joina harnesstoa componentaregenerallylocated ator nearthecomponent.See theComponentLocation Chart.
250 CONN 20
Related Electrical ServiceManuals Title CrossReferenceforElectrical Connectors:
Form Number REHS0970
Resistor, Sender, and Solenoid Specifications Part No.
Component Description
134-2540 Resistor CAN (All Circuits) ¹ Atroom temperatureunlessotherwisenoted.
ENGINE VIEW - LEFT SIDE
4 f o 4 L O V 2 0 7 6 4 e , 6 g a P R 6 1 N E U
Resistance (Ohms)¹ 120
5
4
3
2
1
( 250) ECM-AI R COOLED EN-C1 ECM 327-8513 2645732
A4: E4V3 . 1 HARDWARE
CAT BRAKE SOLENOID LOW /HIGH
K738-EN60
1 2 3
GN-16- XLPE
5
CAT BRAKE SOLENOI D MED/HIGH
G
6 7 8 9 10
J1 939 ENGINE CAN( -) ( CAN B)
11
J1 939 ENGINE CAN (+ ) (CAN B)
12
K 73 7 - E N3 4
B R- 1 6 - X L P E
Y798-EN106 Y 79 7 - E N1 0 9
GN-18- GXL Y L- 1 8 - G X L
13
COM PRESSI ON BRAKE OUTPUT #1 RETURN I NTAKE MANI FOLD PRESS URE S ENSOR
K 73 9 - E N5 8 B U- 1 6 - X L P E R 74 6 - E N5 P K - 1 8 - G XL
14 15 16
ANALOG RETURN
G829-EN77
17
EN-C3 2304009 OR-16- XLPE WH-16-XLPE B R- 1 6 - X L P E G N- 1 6 - X L P E B U- 1 6 - X L P E WH-16-XLPE GN-16- XLPE P U - 1 6 - X LP E GY-16-XLPE Y L- 1 6 - X L P E B R- 1 6 - X L P E B U- 1 6 - X L P E
T860-EN62 T962-EN39 K 7 37 - E N3 4 K 7 38 - E N6 0 K 7 39 - E N5 8 T859-EN74 T961-EN64 T9 5 7 - E N5 7 T858-EN54 T9 5 8 - E N7 5 T9 5 9 - E N6 3 T9 6 0 - E N7 6
4
GN-18- GXL
CONN 81 1
LOC: G-2
2
TO I NTERNAL HARNESS W/ BRAKES GC- C370 ( 03F8) W/O BRAKES GF- C370 ( 03F4)
3 4 5 6
G
7 8 9 10 11 12
18
EN-C10 2388245
19 20
9 9 5 - E N4 6 Y749-EN61
21
2 2 9 - E N2 8
22
B K- 1 4 - G X L
B U- 1 8 - G X L GN-18- GXL
CONN 80 1 LOC: F- 2 2
TO I NTERNAL HARNESS W/ B RAKES GC- C371 ( 03E8) W/O BRAKES GF-C371 ( 03E4)
23
ENGI NE SP EED SENSOR #1 ( -) ( CRANK)
25
TDC SERVI CE PROBE ( + )
26
FUEL PRESSURE SENSOR ( FI LTER OUTLET)
27
ENGI NE OIL P RESSURE SENSOR ENGI NE ANALOG RETURN
F
E 9 6 3- E N1 0 B K- 1 8 - G X L G856-EN11 WH-18-GXL P 7 9 2 - E N6 B U- 1 8 - G X L 9 9 4 - E N1 3 G Y- 1 8 - G X L G 8 33 - E N1 0 5 P K - 1 8 - G XL
28 29 30
EN-C6 ( 256) ENGI NE SPEED SENSOR #1 ( CRANK) 2304011 279-9828
9 9 4 - E N1 3 G Y- 1 8 - G X L 9 9 5 - E N4 6 B U- 1 8 - G X L C 9 67 - E N1 1 2 B U- 1 8 - G X L E 9 6 3- E N 10 B K- 1 8 - G X L E964-EN17 WH-18-GXL E 9 6 5- E N 25 B U- 1 8 - G X L E 9 6 6- E N 24 Y L- 1 8 - G X L
24
31
E 9 6 3- E N 10 E964-EN17
34
ENGI NE S PEED SENSOR #1 ( + ) ( CRANK) TDC SERVI CE PROBE ( -)
E964-EN17 G 8 57 - E N1 8
35 36 37 38 39 40
F 4 2 1- E N 69
Y L- 1 8 - G X L
G828-EN36
WH-18-GXL
F 4 2 1- E N 70 F 4 2 1- E N 71
Y L- 1 8 - G X L Y L- 1 8 - G X L
E 9 6 5- E N 25 E 9 6 6- E N 24
G828-EN38 G828-EN37 GN- 18- GXL
WH-18-GXL WH-18-GXL
G 8 3 3- E N4 2 G 8 3 3- E N8 9
P K - 1 8 - G XL P K - 1 8 - G XL
B U- 1 8 - G X L Y L- 1 8 - G X L
WH-18-GXL Y L- 1 8 - G X L
G829- EN77
41
1
BK-18
2
WH-1 8
EN-C7 ( 255) ENGI NE SPEED SENSOR #2 ( CAM) 2304011 279-9829
32 33
B K- 1 8 - G X L WH-18-GXL
1
BK-18
2
WH-1 8
EN-C8 2304011 C 9 6 7- E N 11 2 G829- EN77
B U- 1 8 - G X L GN- 18- GXL
F
( 258) I NTAKE MANI FOLD TEMP 256-6453 1
SI GNAL
2
GROUND
42
G 8 33 - E N1 0 5
43
P K - 1 8 - G XL
44
EN-C9 1552269 G856-EN11 G 8 5 7- E N 18
45
ENGI NE SPEED SENSOR #2 (+)
(CAM)
46
ENGI NE SPEED SENSOR #2 (-)
(CAM)
47 48 49
E 9 6 6- E N2 4 E 9 6 5- E N2 5
Y L- 1 8 - G X L B U- 1 8 - G X L
Y738-EN26
GY-18- GXL
G856-EN11 G 8 57 - E N1 8 K 7 37 - E N3 4 K738-EN60 K 7 39 - E N5 8
50 51
FUEL PUMP RELAY DOUT RTN
52
WH-18-GXL Y L- 1 8 - G X L B R- 1 6 - X L P E GN-16- XLPE B U- 1 6 - X L P E P 7 9 2 - E N7 P 7 9 2 - E N8
53
E
P 7 9 2 - E N6
54
B U- 1 8 - G X L R 7 46 - E N5 R747-EN40
P K - 1 8 - G XL GY-18-GXL
T788-EN19
GN-14- GXL
2
U 7 81 - E N1 U 7 82 - E N2
Y L- 1 8 - G X L P K - 1 8 - G XL
P 7 9 2 - E N8 F 4 2 1- E N 71
B U- 1 8 - G X L Y L- 1 8 - G X L
T858-EN54 GY-16-XLPE T859-EN74 WH-16-XLPE T860-EN62 OR-16- XLPE T9 5 7 - E N5 7 P U - 1 6 - X LP E T958-EN75 YL-16-XLPE T959-EN63 BR-16-XLPE T960-EN76 BU-16-XLPE T961-EN64 GN-16- XLPE T962-EN39 WH-16-XLPE U 78 1 - E N1 Y L- 1 8 - G X L U 78 2 - E N2 P K - 1 8 - G XL Y 7 37 - E N2 7 Y L- 1 8 - G X L Y738-EN26 GY-18-GXL
63 64 65 66 67 68
PRI MI NG PUMP RELAY CONTROL
69
Y 73 7 - E N2 7
Y L- 1 8 - G X L
ENGI NE LEFT + 5VS UPPLY
70 71 72
G828-EN36
WH-18-GXL
73 74 75 76 77
R747-EN40
78
Y748-EN43
WH-18-GXL
Y7 49 - EN4 5
G N- 1 8 - GXL
80 81
+ 5VSUPPLY
82
ENGI NE RI GHT RETURN COOLANT TEMPER ATURE
SENSOR
Y748-EN43 WH-18-GXL U 78 1 - E N1 Y L- 1 8 - G X L Y7 49 - EN4 5 G N- 1 8 - GXL 9 9 5 - E N4 6 B U- 1 8 - G X L
83 84 85 86 87
Y 7 97 - E N1 0 9 Y 7 97 - E N1 1 0
88 89
) s e h c n i 4 2 x s e h c n i 8 1 : s n o i s n e m i D (
Y798-EN106 Y798-EN107
91 92
ANALOG RETURN
FUEL PRESSURE SNSR FUEL TEMP S NSR
4 5
U 78 2 - E N2
93
Y748-EN84 G 8 33 - E N4 2 R747-EN40
WH-18-GXL P K - 1 8 - G XL GY-18- GXL
Y748-EN84 Y748-EN79
WH-18-GXL WH-18-GXL
Y749-EN61 Y 7 49 - E N1 0 0 Y749-EN99
GN-18- GXL G N- 1 8 - G X L GN-18- GXL
Y 7 97 - E N1 1 1
Y L- 1 8 - G X L
Y 7 98 - E N1 0 8
G N- 1 8 - G X L
8 9 10 11 12
1
+ VOLTS
2
GROUND
3
G828-EN38 WH-18-GXL Y749-EN99 GN-18- GXL R 7 46 - E N5 P K - 1 8 - G XL
SI GNAL
1
OR-18
Vs
2
YL-18
GROUND
3
GN-18
SI GNAL
95
1
OR-18
+ 5 VOLTS
2
BK-18
GROUND
3
WH-18
SI GNAL
GN-18- GXL GN-18- GXL
P K - 1 8 - G XL
FUEL TEMPERATURE SENSOR
96
(DO C) I NJECTOR 5 -6 HIGH SI DE
97 98 99
C
C 9 67 - E N1 1 2 F 4 2 1- E N6 9
EN-C16 1552267
B U- 1 8 - G X L Y L- 1 8 - G X L
T860-EN62
Y798-EN107 Y 7 97 - E N1 1 0
OR-16- XLPE
TO FUEL J UMPER MATI NG CONNECTOR
( 251) TERM RESI STOR 134-2540
GN-18- GXL Y L- 1 8 - G X L
G828-EN37 Y749-EN100
B C
WH-18-GXL GN-18- GXL
P 7 9 2 - E N7 F 4 2 1- E N 70
102 103 104 105
I NJECTOR 3 RETURN
106
I NJECTOR 5 RETURN
107
I NJECTOR 4 RETURN
108
T858-EN54 T962-EN39 T959-EN63 T961-EN64 T960-EN76
GY-16- XLPE WH-16-XLPE BR-16-XLPE GN-16- XLPE BU-16-XLPE
B U- 1 8 - G X L Y L- 1 8 - G X L
I NJECTOR 2 RETURN
SYMB OL
DESCRIPTION
B
HARNESS MATING FROMEN-C3
LOC: G- 2
1 2 3 4 5 6 7 8 9 10 11 12
GC-C370 2304010 T860-GC9 T962-GC6 K737-GC23 K738-GC16 K739-GC17 T859-GC8 T961-GC5 T957-GC1 T858-GC7 T958-GC2 T959-GC3 T960-GC4
GC-C371 2388246 1 2
K737-GC23
BR-16-NW
K738-GC16
( 02F4)
OR-16-NW WH-16-NW BR-16-NW GN-16-NW BU-16-NW WH-16-NW GN-16-NW PU-16-NW GY-16-NW YL-16-NW BR-16-NW BU-16-NW
T859-EN74 T9 5 7 - E N5 7 T958-EN75
116 117 118 119 120
WH-16-XLPE P U - 1 6 - XL P E YL-16-XLPE
11
INTERNALELECTRICALCONNECTION TO SURFACEOF COMPONENT CONNECTOR H#
K737-GC18 K737-GC19
BR-16-NW BR-16-NW
T858-GC11 GY-16-NW T957-GC1 PU-16-NW
WIRE GROUP COLOR DESCRIPTIONS
CIRCUITGROUPING DESIGNATION
GROUND CIRCUIT
BU-16-NW
K739-GC20 K739-GC21 K739-GC22
BU-16-NW BU-16-NW BU-16-NW
GY - 16 - NW
T 85 8 - GC 1 0 T858-GC11
GY - 16 - NW GY-16-NW
T 85 9 - G C8
W H - 1 6 - NW
T 85 9 - G C1 2 T859-GC13
W H - 1 6 - NW WH-16-NW
T 86 0 - GC 14 T860-GC15
O R- 1 6 - NW OR-16-NW
T858-GC10 GY-16-NW T958-GC2 YL-16-NW
( 02E4)
SPLICE
1
HIGHWAYS
2
( 264) I NJ 3 GC 1 2
( 265) I NJ 4 GC 1 2
( 266) I NJ 5 GC 1 2
GC-C306 7E6513
995-GC24 BU-16-NW Y749-GC25 GN-16-NW
T860-GC14 T962-GC6
OR-16-NW WH-16-NW
( 267) I NJ 6 GC 1 2
GC-C374 3660615
CONN 80 LOC: F- 2
K737-GC19 K739-GC20
BR-16-NW BU-16-NW
K738-GC16 K739-GC21
GN-16-NW BU-16-NW
K737-GC18 K739-GC22
GC-C376 3660615 BR-16-NW BU-16-NW
( 259) BRAKE 1 2 250-9378
GC-C605 1134630 995-GC24 BU-16-NW Y749-GC25 GN-16-NW
NG-C1 1552272 1 2
COLOR
RD
RED
WH
WHITE
OR
ORANGE
YL
YELLOW
PK
PINK
BK
BLACK
GY
GRAY
PU
PURPLE
BR
BROWN
GN
GREEN
BU
BLUE
(52) VALVE GP - CONTROL 138-1234 PartNumber
Component Name
DES I GNATI ON
DES CRI P TI ON
PART NUMBER
CHG LVL
EN
MAI N ENGI NE HARNES S
417- 0979
00
GC
I NTE RNAL E NG I NE HAR NE S S W/ B RAKE
370-3257
00
THIS SCHEMATIC IS FOR THE 16M3 AND 18M3 MOTOR GRADER ELECTRICAL SYSTEM
B
VOLUME 4 of 4: ENGINE WIRING
( 261) BRAKE 5 6 250-9378 A
MEDIA NUMBER: UENR6467-02 SCHEMATIC PART NUMBER: 353-9559, CHANGE: 05, VERSION: -
B
( 253) COOLANTTEMP 256-6453 1
SI GNAL
2
GROUND
Components are shown installed on a fully operable machine with the key and engine off, transmission shifter in neutral and with parking brake set. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations. Refer to the Parts Manual using a specific serial number prefix in SIS before ordering parts from this schematic.
4
4
(MachineLocationfrom ComponentLocationsTable)
( 260) BRAKE 3 4 250-9378 A
3
5
CALLOUTS Callout Number
B
NG-C2 2304011
995-NG1 BU-14-TEFLON Y749-NG2 GN-14-TEFLON
ABBREV
A
GC-C375 3660615
A
OTHER COLOR DESCRIPTIONS
( 263) I NJ 2 GC
GC-C305 7E6513 T860-GC15 OR-16-NW T961-GC5 GN-16-NW
B
CAN DATA LINK B
BLADE, SPADE, RING ORSCREW TERMINAL
2
GC-C304 7E6513 T859-GC12 WH-16-NW T960-GC4 BU-16-NW
ENGINE CONTROL CIRCUIT
1
GC-C303 7E6513 T859-GC13 WH-16-NW T959-GC3 BR-16-NW
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS OFF
( 262) I NJ 1 GC
GC-C302 7E6513
GN-16-NW
T957-GC1 PU-16-NW T958-GC2 YL-16-NW T959-GC3 BR-16-NW T960-GC4 BU-16-NW T961-GC5 GN-16-NW T962-GC6 WH-16-NW
FROMEXTERNAL HARNESS MATING FROMEN-C10
9
12
K739-GC17
O R- 1 6 - NW
P RI MARY PUMP BATT ( + ) PRI MARY PUMP BATT ( -)
8
ELECTRICALCONNECTIONTO MACHINESTRUCTURE
T 85 8 - GC 7
T8 6 0- G C9
5
CIRCUITNOT CONNECTED
ATCHWIRE, CABLE, COMPONENT
FROMEXTERNAL
C
FUEL PRESSURE SNSR FUEL TEMP S NSR
4
10
CIRCUITCONNECTED
111 112 113 114 115
GC-C301 7E6513
CONN 81
2
7
T788-EN19 GN-14- GXL 2 2 9 - E N2 8 B K- 1 4 - G X L
110
I NJECTOR 1 RETURN
+ 5 V S U P P LY ANALOG RETURN
1
6
109
(DO C) I NJECTOR 3 -4 HIGH SI DE
( 03C8)
3
101
I NJECTOR 6 RETURN
FK-C1
EN-C15 2304009
A
100
(DO C) I NJECTOR 1 -2 HIGH SI DE
D
( 254) ENGI NE OI L PRES S S ENSOR 293-5535
94
I NTAKE MANI FOLD AIR TEMPERATURE
BATT ( + )
( 257) I NTAKE MANF PRES S SENSOR ( I MP) 325-7472
EN-C13 2370227 WH-18-GXL P K - 1 8 - G XL G Y- 1 8 - G X L
RELAY CONTROL RTN RELAY CONTROL BATT ( -)
( 252) BAROMETRI C P RESS SENSOR 320-3063
EN-C11 2818804
Y748-EN79 G 8 33 - E N8 9 9 9 4 - E N1 3
P RI MARY PUMP P RI MARY PUMP PRI MARY PUMP CAN B ( + ) PRI MARY PUMP CANB ( -)
7
EN-C14 2818803
Y L- 1 8 - G X L Y L- 1 8 - G X L
90
4 f o 4 L O V 2 0 7 6 4 , 6 e g a R P 8 N E U
Y738-EN26 GY-18- GXL Y 7 37 - E N2 7 Y L- 1 8 - G X L 2 2 9 - E N2 8 B K- 1 4 - G X L Y 7 97 - E N1 1 1 Y L- 1 8 - G X L T788-EN19 GN-14- GXL Y798-EN108 GN-18- GXL
GY-18- GXL
79
ENGI NE RI GHT+ 5V SUPPLY
E
+ 5 V S U P P LY ANALOG RETURN
2
6
62
D
FROM APPLICATI ON HARNESS
CONN 20 LOC: VOL 1 ( C-6)
1
61
BAROMETRIC P RESS URE SENSOR
CONN 82
3
59 60
TDC SERVI CE PROBE
1
EN-C2 2304010
B U- 1 8 - G X L B U- 1 8 - G X L
55 56 57 58
WH-18-GXL Y L- 1 8 - G X L
3
2
1
A
