RENR7243-04 November 2009
Harness And Wire Electrical Schematic Symbols Symbols
T
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
Circuit Breaker Symbol
Symbols and Definitions 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.
324D, 325D, 325D MHPU, and 329D Excavator Electrical System 324D: LAB1-UP EJC1-UP T2D1-UP SYM1-UP
325D: GPB1-UP NAC1-UP PKE1-UP LAL1-UP MCL1-UP PAL1-UP GBR1-UP T2S1-UP CYW1-UP
325D MHPU: C3N1-UP
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.
T
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.
329D: BFC1-UP SCY1-UP
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 in ternal switch that places the latch coil circuit open at the time the coil latches.
Harness and Wire Symbols 1 2
Deutsch connector: Typical connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes
C-C4 AG-C3 130-6795 130-6795
Part Number for Connector Plug
325-AG135 PK-14 Pin
Sure-Seal connector: Typical connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness. (C1, C2, C3, .....)
L-C12 3E-5179
AG-C4 111-7898
1
Part Number For Connector Recepticle
5A
RENR7243-04 November 2009
Harness And Wire Electrical Schematic Symbols Symbols
T
Pressure Symbol
Temperature Symbol
Level Symbol
Circuit Breaker Symbol
Flow Symbol
Symbols and Definitions 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.
324D, 325D, 325D MHPU, and 329D Excavator Electrical System 324D: LAB1-UP EJC1-UP T2D1-UP SYM1-UP
325D: GPB1-UP NAC1-UP PKE1-UP LAL1-UP MCL1-UP PAL1-UP GBR1-UP T2S1-UP CYW1-UP
325D MHPU: C3N1-UP
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.
T
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.
329D: BFC1-UP SCY1-UP
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 in ternal switch that places the latch coil circuit open at the time the coil latches.
Harness and Wire Symbols Deutsch connector: Typical connector: Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)
Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes Part Number for Connector Plug
C-C4 AG-C3 130-6795 130-6795
Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness. (C1, C2, C3, .....)
Socket
L-C12 3E-5179
AG-C4 111-7898
Part Number For Connector Recepticle
1
325-AG135 PK-14 Pin
Sure-Seal connector: Typical connector: Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
1 2
5A
Receptacle Pin or Socket Number
Single Wire Connector
9X-1123
Component Part Number
Plug
2
Harness identification code: This example indicates wire 135 in harness "AG".
Volume Volum e 2 of 2: Engine Wiring
Fuse (5 Amps)
Ground Connection
200-L32 BK-14 Circuit Identification Number
Wire Color
Wire Gauge
Printed in U.S.A.
©2009 Caterpillar All Rights Reserved Reserved
Component Identifiers (CID¹) Module Identifier (MID²) Engine Control System (MID No. 036) CID
ECM Connector EN-C1
Event Codes Engine Control
Component
Event Code
I nj nj ec ec to to r C yl n i de de r #1
E 09 6
Hg i h F ue l Pr es es su re re
0 00 00 2
I nj nj ec ec to to r C yl n i de de r #2
E 16 2
Hg i h Bo os t Pr es su re
0 00 00 3
I nj nj ec ec to to r C yl n i de de r #3
E 19 8
L ow ow F ue l Pr es es su re
0 00 00 4
I nj nj ec ec to to r C yl n i de de r #4
0 00 00 5
I nj nj ec ec to to r Cy il nd nd er er # 5
E 26 26 5
U se se r D ef ef in ed ed Sh ut ut do do wn
0 00 00 6
I nj nj ec ec to to r C yl n i de de r #6
E 36 36 0
L ow ow En En gi gi ne ne Oi Oi l P re re ss ss ur ur e
0 04 1
8 Vo tl DC S up pl y
E 36 36 1
H ig h En gi gi ne ne c oo la nt nt T em pe pe r at ur ur e
0 04 04 2
I nj nj ec ec to to r A ct ct ua ua titi on on Va lv e
E 36 2
E ng n i e O ve rs rsp ee ee d
0 09 09 1
T hr hr ot ot tltl e P os it io n
E 39 39 0
F ue ue l Fi lt er er R es trtr ic titi on on
0 09 09 4
Fu el P re ss ur e
E 53 53 9
H ig h I nt a ke M an an if ol ol d A ir T em em pe pe ra ra tu tu r e
0 10 10 0
E ng ng in e O li Pr Pr es es su su re re
0 11 11 0
E ng ng in e Co ol ol an an t Te mp mp er er at at ur ur e
0 16 16 4
I nj nj ec ec to to r Ac Ac tu tu at at io n Pr Pr es es su su re re
0 16 16 8
E le ct ct riri ca ca l S ys ys te te m V ol ol ta ta ge ge
0 17 17 2
I nt nt ak ak e M an if ol ol d A ir T e mp er er at at ur ur e
0 17 17 4
F ue ue l T em em pe ra ra tu tu re re
0 19 19 0
E ng ng in e S pe ed ed Se Se ns ns or or
0 25 25 3
P er er so so na na li ty ty Mo du du le
0 26 26 1
E ng ng in e T im in g C al al ib ra ra titi on on
0 2 62
5 V ol t DC S en so so r Po we we r Su pp pp ly
0 26 26 8
C he he ck ck P r og og ra ra mm mm ab ab le P a ra ra me me te te rs rs
0 27 27 4
A tm tm os ph ph er er ic P r es es su re re
0286
EMS Oil Lamp
0 34 34 2
S ec ec on on da da ry ry E ng ng in e S pe pe ed ed
0 61 7
A ri In In e l t H ea te r
1 63 63 9
M ac ac hi hi ne ne S ec ec ur ur it y S ys ys te te m
1 78 78 5
I nt nt ak ak e M an if ol ol d P re re ss ss ur ur e S en so so r
2 41 41 7
E th th er er I n je ct ct io n C on on tr tr ol ol S o le no no id
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.
Engine View Harness Connector And Component Locations EN-C9
INJECTOR HARNESS CONNECTOR
EN-C7
INTAKE MANIFOLD AIR TEMPERATURE SENSOR CONNECTOR
INJECTOR ACTUATION PRESSURE CONTROL VALVE CONNECTOR
EN-C13
EN-C11
RAIL PRESS. SENSOR CONNECTOR
ATM PRESS. SENSOR CONNECTOR CHASSIS HARNESS INTERFACE
EN-C3
INLET AIR HEATER CONNECTOR EN-C2 EN-C6
BOOST PRESSURE SENSOR CONNECTOR
EN-C16
EN-C12
COOLANT TEMPERATURE SENSOR CONNECTOR
EN-C14
CAP
EN-C10
TDC PROBE CONNECTOR
Failure Mode Identifiers (FMI)¹ FMI No.
Failure Description
0
D at at a va va li d bu bu t a bo ve ve n or or ma ma l op op er er at at io n al r an an ge ge .
1
D at at a va va li d bu bu t b el ow ow n or or ma ma l op op e ra titi on on al al r a ng e. e.
2
D at at a e rr at at ic , in te te rm rm it t en t,t, o r in co co r re ct ct .
3
V ol ol ta ta ge ge ab ab o ve no no rm rm al al or or sh sh or or te te d h ig h. h.
4
V ol ol ta ta ge ge be be lo w n o rm al al or or sh sh o rt ed ed lo w. w.
5
C ur ur r en t b el el ow ow no no r ma l o r o pe pe n c ir c ui t.t.
6
C ur ur r en t ab ov ov e no no rm rm al al o r g ro ro un un de de d ci ci rc rc ui ui t.t.
7
M ec ec ha ha ni ni ca ca l sy sy st st em em n o t re re sp sp o nd in g p ro p er ly .
8
A bn bn or or ma ma l fr fr eq eq ue ue n cy , p ul se se w id th th , o r pe r o i d.
9
Abnormal up update.
10
A bn bn or or ma ma l r at at e o f c ha ha ng ng e. e.
11
F ai ai lu r e m od od e n ot ot i de de nt nt if ia bl bl e. e.
12
B ad ad d ev ev ic e o r c om om po ne ne nt nt .
13
O ut o f c al b i ra ra ti on .
14
P ar ame te te r f ai u l re s.
15
P ar ame te te r f ai u l re s.
16
P ar ar am am et et er er no t a va va il ab ab le .
17
Mo du du e l n ot r es esp on on di ng .
18
S en so r s up pl ply fa fa ul t.
19
Condition no not me met.
20
P ar ame te te r f ai u l re s.
¹The FMI is a diagnostic code that indicates what type of failure has occurred.
(CRANK - BOTTOM) SECONDARY SPEED/TIMING SENSOR B CONNECTOR EN-C5
(RUN - TOP) PRIMARY SPEED/TIMING SENSOR A CONNECTOR EN-C4
ENGINE OIL PRESSURE SENSOR CONNECTOR EN-C15
EN-C1
ECM
Condition
0 00 00 1
Related Electrical Service Manuals Title Eng in e Trou bleshooting:
Form Number RENR5089
2 f o 2 L O V 4 0 3 4 2 , 7 e g a R P 8 N E R
) 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 (
EN-C9 3E5179 T957-EN16 PU-18-XLPE T958-EN17 YL-18-XLPE T959-EN18 BR-18-XLPE T960-EN19 BU-18-XLPE T961-EN28 GN-18-XLPE T962-EN29 WH-18-XLPE T860-EN90 OR-18-XLPE T860-EN89 OR-18-XLPE T859-EN88 WH-18-XLPE T859-EN87 WH-18-XLPE T858-EN86 GY-18-XLPE T858T8 58-EN EN85 85 GY-18 18-XL -XLPE
1 2 3 4 5 6 7 8 9 10 11 12
EP-C1 1552252 A701-EP1 GY-16-NW A702-EP3 PU-16-NW A703-EP5 BR-16-NW A704-EP7 GN-16-NW A705-EP9 BU-16-NW A706-EP11 GY-16-NW L985-EP12 YL-16-NW L985-EP10 YL-16-NW L984-EP8 OR-16-NW L984-EP6 OR-16-NW L983-EP4 WH-16-NW L9833-EP2 EP2 WH-16-NW
CONN 72 EN-C1 2645732 J2
ENGINE CONTROL MODULE 2267475
INTAKE AIR HEATER MAINTENANCE LAMP
IAP CONTROL VALVE RETURN COOLANT TEMPERATURE SENSOR INTAKE MANIFOLD AIR PRESSURE SENSOR TRANSMISSION OIL PRESSURE SENSOR ANALOG RETURN (BOOST,IAP) STARTER INTERLOCK IAP CONTROL VALVE
PASSIVE SPD -1: (RUN) TOP SPD/TMG SNSR A TDC SERVICE PROBE + TRANSMISSION OIL TEMPERATURE SENSOR ENGINE OIL PRESSURE SENSOR +8V DIGITAL POWER (COOLANT LVL,EXHAUST TEMP) TEMPERATURE SENSOR COMMON SMART WASTEGATE ACTUATOR (-) (POTENTIAL) PASSIVE SPD +1: (RUN) TOP SPD/TMG SNSR A TDC SERVICE PROBE FUEL LEVEL SENSOR EXHAUST TEMPERATURE SENSOR FUEL PRESSURE SENSOR
SMART WASTEGATE ACTUATOR (+) (POTENTIAL) PASSIVE SPD +2: (CRANK) BOTTOM SPD/TMG SNSR B PASSIVE SPD -2: (CRANK) BOTTOM SPD/TMG SNSR B COOLANT LEVEL SENSOR
ANALOG RETURN (FUEL,LUBE) INTAKE MANIFOLD AIR TEMPERATURE SENSOR ATMOSPHERIC PRESSURE SENSOR
FUEL TEMPERATURE SENSOR LOAD FEED BACK (+) (FUTURE) FUEL PRESSURE SWITCH
LOAD FEEDBACK (-) (FUTURE) PRESSURE SENSOR +5V (BOOST,IAP)
INTAKE AIR HEATER RETURN PRESSURE SENSOR +5V (FUEL,LUBE) +5V ANALOG POWER (TRANS TEMP, TRANS PRESS.) FUEL PRESSURE SWITCH RETURN INJECTOR ACTION PRESS SENSOR
DIGITAL RETURN (COOLANT LEVEL, EXHAUST TEMP) ANALOG RETURN (TRANS TEMP & PRESS,FUEL LEVEL)
INJECTOR 5&6 HS
2 f o 2 L O V 4 0 3 4 2 , 7 e g a R P 8 N E R
) 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 (
INJECTOR 1&2 INJECTOR 6 INJECTOR 3 INJECTOR 5 INJECTOR 4
HS LS LS LS LS
INJECTOR 3&4 HS INJECTOR 1 LS INJECTOR 2 LS
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
EP-C2 1539693 A
B
EP-C3 1539693 A
EP-C4 1539693
B
A
EP-C5 1539693
B
A
EP-C6 1539693
B
A
EP-C7 1539693
B
A
B
C987-EN99 RD-18 CYL HEAD SOL 1
CYL HEAD SOL 2
CYL HEAD SOL 3
CYL HEAD SOL 4
CYL HEAD SOL 5
CYL HEAD SOL 6
G855-EN91 PU-18 995-EN12 BU-18 R746-EN20 PK-18 G829-EN93 GN-18 G854-EN100PK-18
E963-EN27 BK-18 G856-EN22 WH-18 994-EN10
GY-18
G833-EN47 PK-18
E964-EN26 WH-18 G857-EN30 YL-18
C991-EN33 PK-18
T957-EN16 T958-EN17 T959-EN18 T960-EN19 T961-EN28 T962-EN29
PU-18-XLPE YL-18-XLPE BR-18-XLPE BU-18-XLPE GN-18-XLPE WH-18-XLPE
T860-EN34 OR-18-XLPE
T860-EN90 OR-18-XLPE T860-EN89 OR-18-XLPE
T859-EN37 WH-18-XLPE
T859-EN88 WH-18-XLPE T859-EN87 WH-18-XLPE
T858-EN23 GY-18-XLPE
T858-EN86 GY-18-XLPE T858-EN85 GY-18-XLPE TWISTED PAIR G856-EN22 WH-18 G857-EN30 YL-18
E966-EN49 YL-18 E965-EN48 BU-18
EN-C2 1552269
C987-EN99 RD-18 G850-EN98 BU-18
C991-EN33 PK-18
G827-EN2
BU-18
C967-EN15 BU-18 R747-EN6 GY-18
A751-EN13 YL-18 T725-EN32 WH-18
994-EN10 GY-18 995-EN12 BU-18 R746-EN20 C967-EN15 E965-EN48 E963-EN27 E964-EN26
G826-EN1 BR-18
G829-EN93 GN-18
G833-EN47 PK-18
N707-EN31 PU-18 G849-EN96 BR-18
TWISTED PAIR
SIG -
A B
SIG +
(RUN) TOP SPD/TMG SNSR A 1097194
EN-C4 1003320 A
SIG -
B
SIG +
INTAKE MAINIFOLD AIR TEMP SNSR 1978391
EN-C7 1552269
G826-EN35 BR-18 G826-EN38 BR-18 G827-EN36 G827-EN43 G828-EN40 G828-EN95 G828-EN39 G829-EN94 G829-EN42 G829-EN41
(CRANK) BOTTOM SPD/TMG SNSR B 1097195
EN-C5 1112416
E963-EN27 BK-18 E964-EN26 WH-18
G856-EN22 WH-18 G857-EN30 YL-18 C987-EN99 RD-18
G828-EN92 WH-18
G850-EN98 BU-18 G826-EN1 BR-18
TWISTED PAIR
C967-EN15 BU-18 G833-EN45 PK-18
BU-18 BU-18 WH-18 WH-18 WH-18 GN-18 GN-18 GN-18
1 2
EN-C6 1552269 995-EN12 BU-18 G833-EN44 PK-18
G854-EN100PK-18 G855-EN91 PU-18
G849-EN96 BR-18 G850-EN98 BU-18 G854-EN100PK-18 G855-EN91 PU-18 R747-EN6 GY-18
1 2
SIGNAL GROUND
1 2
IAP CONTROL VALVE 2188654 BK-18 BK-18
EN-C15 ENGINE OIL PRESS SENSOR 1552267 1978394 G826-EN38 BR-18 G827-EN43 BU-18 994-EN10 GY-18
A B C
ANALOG +5V GROUND SIGNAL
EN-C12 INTAKE MANIFOLD PRESSURE SENSOR 1552267 2101747
A751-EN13 YL-18 T725-EN32 WH-18 N707-EN31 PU-18
G828-EN39 WH-18 G829-EN41 GN-18 R746-EN20 PK-18
A B C
EN-C13 3E3370 G828-EN95 WH-18 G829-EN94 GN-18 G849-EN96 BR-18
E966-EN49 YL-18
ANALOG +5V GROUND SIGNAL
INJECTOR ACTION PRESS SENSOR 2366220
A B C
OR-18 YL-18 GN-18
ANALOG +5V GROUND SIGNAL
EN-C16 1552264
T860-EN34 OR-18-XLPE
T858-EN23 T962-EN29 T959-EN18 T961-EN28 T960-EN19
SIGNAL GROUND
COOLANT TEMP SNSR 1978392
EN-C3 1552269
G833-EN45 PK-18 G833-EN46 PK-18 G833-EN44 PK-18
SH1 G-17 TO AIR HEATER RELAY CONNECTOR
+ INLET AIR HEATER
1 2
E965-EN48 BU-18 E966-EN49 YL-18
PK-18 BU-18 BU-18 BK-18 WH-18
G827-EN2 BU-18
G828-EN92 WH-18
EN-C10 EN-C14 1552269 3E3364 1 + T IMING PROBE 2 - CONNECTOR
A751-EN13 YL-18 G833-EN46 PK-18 T725-EN32 WH-18 N707-EN31 PU-18 G826-EN35 BR-18
GY-18-XLPE WH-18-XLPE BR-18-XLPE GN-18-XLPE BU-18-XLPE
1 2 3 4 5 6 7 8
G827-EN36 BU-18 G827-EN36
C991-EN33 PK-18
MATE C-C54 SH1 D-17 TO CHASSIS HARNESS
EN-C11 ATMOSPHERIC PRESSURE SENSOR 1552267 1978393 G828-EN40 WH-18 G829-EN42GN-18
R747-EN6 GY-18
T859-EN37 WH-18-XLPE T957-EN16 PU-18-XLPE
A B C
ANALOG +5V GROUND SIGNAL
T958-EN17 YL-18-XLPE
120
5V ANALOG POWER ANALOG RETURN 8V DIGITAL POWER HOUR METER (-) CAT DATA LINK (+) CAT DATA LINK (-)
COLOR ABBREVIATIONS ABBREV
HOUR METER (+)
DIAGNOSTIC LAMP WARNING LAMP REMOTE SHUTDOWN SWITCH MAINTENANCE CLEAR SWITCH
LOW OIL PRESSURE LAMP HIGH COOLANT TEMPERATURE LAMP LOW COOLANT LEVEL LAMP
J1939 DATA LINK (-) SYNCHRONIZE SWITCH 1 TACHOMETER (+) TACHOMETER (-) TRIP CLEAR SWITCH TROLLING MODE SWITCH J1939 SHIELD
MATE C-C55 SH1 H-17 TO CHASSIS HARNESS
RD
RED
WH
WHITE
OR
ORANGE
YL
YELLOW
PK
PINK
BK
BLACK
GY
GRAY
PU
PURPLE
BR
BROWN
GN
GREEN
BU
BLUE
(+) BATTERY UNSWITCHED J1939 DATA LINK (+) (+) BATTERY UNSWITCHED (+) BATTERY UNSWITCHED
DESCRIP TION CIRCUITCONNECTED CIRCUITNOTCONNECTED ELECTRICALCONNECTIONTO MACHINESTRUCTURE INTERNALELECTRICALCONNECTION TO SURFACEOF COMPONENT CONNECTOR
H#
CIRCUITGROUPINGDESIGNATION ATCHWIRE, CABLE, COMPONENT CIRCUITCONNECTED SPLICE BLADE, SPADE, RING ORSCREW TERMINAL
ENGINE COLOR LEGEND (+) BATTERY
I DE NT
P AR T N O. CHG
L OC
EN
1 9 8- 2 71 3
5
D - 10
E N GI NE H A RN E SS
EP
29 9 -5 1 79
5
F - 10
I N JE C TO R H A RN E SS
D ES CR IP TI ON
N OT E
HARNESS AS.
(+) BATTERY SWITCHED STARTING CIRCUIT (-) BATTERY / SENSOR RETURN
SYNCHRONIZE SWITCH 2
SYM BOL
COLOR
SENSOR / ACTUATOR SUPPLY SIGNAL PLUS TO ECM SIGNAL MINUS TO ECM CONTROL PLUS FROM ECM CONTROL MINUS FROM ECM CAT DATALINK
WIRES (944-OR & 945-B R),(E963-BK & R817-GY), (E965-BU & E966-YL), (F723-PK & F724-PU) MUST BE TWISTED TOGETHER AT LEAST 1 TURN PER 25mm UNLESS OTHERWISE SPECIFIED:
ALL WIRES CONNECTED
TO J2 TO BE 16 OR 18 AWG. ALL OTHER WIRES TO BE 16 AWG OR LARGER SAE J112 8 TYPE SXL OR EQUIVALEN T. NO ADDITIONAL CONNECTIONS ARE ALLOWED TO ANY WIRES WITHOUT CATERPILLAR E NGINEERING APPROVAL.
J1939 DATALINK RS-232/RS-485 DATALINK HIGHWAYS
SLOW VESSEL MODE SWITCH (-) BATTERY (-) BATTERY (-) BATTERY PRIMARY THROTTLE POSITION (-) BATTERY SECONDARY THROTTLE POSITION MULTI-STATION CONTROL SYSTEM RETURN (+) BATTERY KEYSWITCH
THIS SCHEMATIC IS FOR THE 324D, 325D, 325D MHPU, AND 329D EXCAVATOR VOLUME 2 of 2: ENGINE WIRING (C7 PETROLEUM ENGINE W/ECM) PART NUMBER: 235-9565, CHANGE: 01, VERSION: Components are shown installed on a fully operable machine. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
