©2000 Caterpillar
All Rights Reserved
Printed in U.S.A.
SpeedTimingSensorConnectors
IAPCV
DeutschDTConnectorReceptacle
DeutschDTConnectorPlug
ReceptacleWedge
ReceptacleWedge
ReceptacleWedge
PlugWedge
PlugWedge
PlugWedge
DeutschandAMPPinContact
DeutschandAMPSocketContact
DeutschandAMPSealingPlug
ElectronicControlModule
6UnitInjectors
InjectionActuationPressureControlValve
TimingCalibrationConnector
TopCamshaftSpeed/TimingSensor
BottomCamshaftSpeed/TimingSensor
InjectionActuationPressureSensor
BoostPressureSensor
OilPressureSensor
TransmissionOilPressureSensor
CoolantTemperatureSensor
InletManifoldAirTemperatureSensor
TransmissionOilTemperatureSensor
InletAirHeaterRelay
InletAirHeater
Battery
_
+
12or24VDC
H O U R S
1/10
V O -1
SERVICE
METER
SyncSwitch
SlowVesselModeSwitch
TrollingModeSwitch
MaintenanceClearSwitch
Hourmeter
Marine
Power
Display
Engine
Monitoring
System
GPSReceiver
(Customer Supplied)
GPSIM
CustomerInstalled
StartSwitch
Customer
Shutdown
SecondaryThrottlePositionSensor
PrimaryThrottlePositionSensor
LowOilPressureLamp
HighCoolantTempLamp
MaintenanceLamp
WarningLamp
DiagnosticLamp
DataLinkConnector
CustomerConnectorJ61/P61
DataLinkConnector
DataBooster
Circuit
Breakers
LEFT SIDE VIEW
SPEED/TIMING
SENSORS
FUEL
TEMPERATURE
SENSOR
(OPTIONAL)
INJECTION
ACTUATION
PRESS
SENSOR
BOOST
PRESSURE
SENSOR
INLET AIR
TEMPERATURE
SENSOR
OIL
PRESSURE
SENSOR
FUEL PRESSURE
SENSOR
(OPTIONAL)
SPEED/TIMING
CONNECTOR
(J402)
SPEED/TIMING
CONNECTOR
(J401)
INLET AIR
HEATER SWITCH
CONNECTOR
(P501)
FUEL
TEMPERATURE
CONNECTOR
(P105)
UNIT INJECTOR
HARNESS
CONNECTOR
(J300/P300)
INJECTION
ACTUATION
PRESSURE
CONTROL
VALVE
CONNECTOR
(J500)
BOOST PRESSURE
CONNECTOR
(J200)
INLET AIR
TEMPERATURE
CONNECTOR
(P103)
OIL PRESSURE
CONNECTOR
(J201)
TDC PROBE
CONNECTOR
(P400)
ECM
CONNECTOR
(P2)
ECM
CONNECTOR
(P1)
SERVICE TOOL
CONNECTOR
(J60)
FUEL
PRESSURE
CONNECTOR
(J209)
TRANSMISSION
PRESSURE
CONNECTOR
(P212A)
TRANSMISSION
TEMPERATURE
CONNECTOR
(J137A)
CUSTOMER
CONNECTOR
(J61)
INJECTION
ACTUATION
PRESSURE
CONNECTOR
(J204)
RIGHT SIDE VIEW
SMMS
CONNECTOR
(P515)
2
1
A B
TOP VIEW
COOLANT
TEMPERATURE
SENSOR
COOLANT LEVEL SENSOR
(OPTIONAL)
COOLANT
TEMPERATURE
CONNECTOR
(P100)
COOLANT LEVEL
CONNECTOR
(P800)
G850/BU
F793/OR
INJECTOR
CYLINDER
NO.5
INJECTOR
CYLINDER
NO.6
J306/P306J305/P305J304/P304J303/P303J302/P302
L984/OR
INJECTOR
CYLINDER
NO.4
J301/P301
INJECTOR
CYLINDER
NO.1
A704/GN
A705/BU
A703/BR
A702/PU
A701/GY
L985/YL
L984/OR
A706/GY
L985/YL
L983/WH
L983/WH
INJECTOR
CYLINDER
NO.3
INJECTOR
CYLINDER
NO.2
12
11
10
9
8
7
6
5
4
3
2
1
SIGNAL
RETURN
ANLG SNSR PWR
P200/J200
ENG BOOST PRESS. SNSR
(161-9929)
A
B
C
A746/PK
993/BR
997/OR
/ F723/PK
/ F724/PU
/ E966/YL
/ E965/BU
/ R817/GY
/ E963/BK
/ G854/PK
/ G855/PU
/ G849/BR
/ 994/GY
/ C991/PK
/ A746/PK
/ 993/BR
/ 997/OR
/ G833/PK
/ N941/YL
/ N940/BU
/ J842/BK
/ R800/OR
/ C967/BU
/ 995/BU
/ A751/YL
/ R818/YL
/ G428/BU
/ M967/OR
/ G850/BU
+
-
P500/J500
IAP CONTROL VALVE
A
B
G854/PK
G855/PU
J137A/P137A
J212A/P212A
G428/BU
N941/YL
N940/BU
A
B
C
C
B
A
R818/YL
N941/YL
N940/BU
22
23
58
59
48
49
61
62
27
24
16
40
25
3
2
18
42
41
5
4
35
32
33
17
15
6
12
9
TIMING CALIBRATION
PROBE CONNECTOR
P2/J2
CONT
TIMING CAL PROBE +
TIMING CAL PROBE -
BOTTOM SP/TMG +
BOTTOM SP/TMG -
TOP SP/TMG +
TOP SP/TMG -
IAP CONTROL VALVE +
IAP CONTROL VALVE -
INJECTOR ACTUATION PRESS.
ENGINE OIL PRESS.
OPTIONAL FUEL PRESS.
ENG BOOST PRESS.
ANALOG SNSR COMMON 1
ANALOG SNSR PWR (+5V) 1
ENG TEMP SNSR COMMON
ANALOG SNSR COMMON 2
ANALOG SNSR PWR (+5V) 2
DIGITAL SNSR COMMON
DIGITAL SNSR PWR (+8V)
INTAKE AIR TEMP
ENGINE COOLANT TEMP
OPTIONAL FUEL TEMP
TRANSMISSION TEMP
TRANSMISSION PRESS.
OPTIONAL COOLANT LEVEL
INLET AIR HEATER
/ F793/OR
IAH RELAY RETURN
TRANSMISSION PRESS. SNSR
(161-9932)
COOLANT LEVEL SNSR
(111-3794)
(OPTIONAL)
A
B
C
1
2
R817/GY
E963/BK
A
B
R818/YL
N941/YL
N940/BU
TRANSMISSION TEMP. SNSR
(106-0735)
(OPTIONAL)
A
B
C
C991/PK
993/BR
997/OR
C
B
A
PRESS. SNSR
INJECTOR ACTUATION
(161-9933)
A
B
C
B
A
TOP SP/TMG SNSR
(169-3300)
E966/YL
E965/BU
2
1
P2/J2
ELECTRONIC
CONTROL
MODULE
C
B
A
ECM GROUND STRAP
(SEE NOTE A)
(-) BATTERY BUS BAR
G428/BU
N941/YL
N940/BU
M967/OR
J842/BK
R800/OR
A751/YL
G833/PK
44
45
46
55
54
39
38
37
36
INJECTOR COMMON 1 & 2
INJECTOR COMMON 3 & 4
INJECTOR COMMON 5 & 6
INJECTOR 6
INJECTOR 5
INJECTOR 4
INJECTOR 3
INJECTOR 2
INJECTOR 1
J800/P800
J212/P212
J137/P137
C967/BU
G833/PK
J100/P100
J105/P105
J103/P103
P201/J201
P209/J209
INTAKE AIR TEMP. SNSR
(130-9811)
P204/J204
SIGNAL
RETURN
ANLG SNSR PWR
SIGNAL
RETURN
ANLG SNSR PWR
SIGNAL
RETURN
ANLG SNSR PWR
P401/J401
SIGNAL
RETURN
SIGNAL
RETURN
ENGINE OIL PRESS. SNSR
(161-9931)
FUEL PRESS. SNSR
(161-1705)
(OPTIONAL) NOTE V
(OPTIONAL) NOTE V
(OPTIONAL) NOTE V
A
B
C
994/GY
993/BR
997/OR
P402/J402
SIGNAL
RETURN
ANLG SNSR PWR
SIGNAL
RETURN
ANLG SNSR PWR
F723/PK
F724/PU
SIGNAL
RETURN
ANLG SNSR PWR
+
-
/ L983/WH
/ L984/OR
/ L985/YL
/ A706/GY
/ A705/BU
/ J763/GY
/ A703/BR
/ A702/PU
/ A701/GY
G849/BR
993/BR
997/OR
P300/J300
995/BU
G833/PK
COOLANT TEMP. SNSR
(130-9811)
2
1
SIGNAL
RETURN
FUEL TEMP. SNSR
(130-9811)
2
1
2
1
+
-
BOTTOM SP/TMG SNSR
(169-3300)
J400/P400
TO P501
051T251-BK-4
053T264-OR-4
052T056-RD-4
059T265-RD-4
BAT.
12 OR 24V
+BATTERY
BUS BAR
-BATTERY
BUS BAR
CISS
OFF
ON
CUSTOMER PROVIDED
SHUTDOWN SWITCH
(NOTE E)
ALT
START
OFF
ON
START
S
MTR BAT.
G
STARTING
MOTOR
CB
10A
CB
(NOTE G)
CB
10A
CB
10A
SERVICE TOOL
CONNECTOR
J906/BR
229/BK
944/OR
945/BR
K900/YL
K990/GN
A234/BK
A
B
D
E
G
F
C
H
J
J60
KEYSWITCH
-BAT.
CAT DATA LINK +
CAT DATA LINK -
UNUSED
UNUSED
P64/J64
4
3
2
1
944/OR
945/BR
229/BK
A700/OR
SMMS
1
2
DATA BOOSTER
(143-4518)
CUSTOMER
CONNECTOR
34
35
4
10
37
38
39
19
28
23
21
20
22
25
24
16
18
17
13
12
14
15
7
6
40
29
36
30
1
5
8
2
3
9
M973/BR
M974/YL
M972/PK
M971/BR
F425/PU
R819/GY
F426/BU
L460/YL
F400/GY
F401/GY
F424/YL
F473/YL
F429/BU
A234/BK
K990/GN
K900/YL
L464/BR
F427/PK
450/YL
451/BR
944/OR
945/BR
391/PK
G966/PU
J906/BR
101/RD
101/RD
101/RD
229/BK
229/BK
229/BK
P61/J61
SYNC SWITCH 1
SYNC SWITCH 2
SECONDARY THROTTLE POSITION
PRIMARY THROTTLE POSITION
TROLLING MODE SW
SLOW VESSEL MODE SW
MAINTENANCE CLEAR SW
TRIP CLEAR SW
LOW OIL PRESS. LAMP
HIGH COOLANT TEMP LAMP
MAINTENANCE IND LAMP
WARNING LAMP
DIAGNOSTIC LAMP
J1939 SHIELD
J1939 DATA -
J1939 DATA +
HOUR METER -
HOUR METER +
TACHOMETER +
TACHOMETER -
CAT DATA LINK + (NOTE M & N)
CAT DATA LINK - (NOTE M & N)
REMOTE START
REMOTE SHUTDOWN SW
KEYSWITCH
+BAT. (UNSWITCHED)
+BAT. (UNSWITCHED)
+BAT. (UNSWITCHED)
-BAT. (NOTE A)
-BAT. (NOTE A)
-BAT. (NOTE A)
1
2
100A WITH
130A PEAK AT 11V
SYNC SWITCH 1
SYNC SWITCH 2
SECONDARY THROTTLE POSITION
PRIMARY THROTTLE POSITION
TROLLING MODE SW
SLOW VESSEL MODE SW
MAINTENANCE CLEAR SW
TRIP CLEAR SW
LOW OIL PRESS. LAMP
HIGH COOLANT TEMP LAMP
MAINTENANCE IND LAMP
WARNING LAMP
DIAGNOSTIC LAMP
J1939 SHIELD
J1939 DATA -
J1939 DATA +
J1939 SHIELD
J1939 DATA -
J1939 DATA +
HOUR METER -
HOUR METER +
TACHOMETER +
TACHOMETER -
CAT DATA LINK +
CAT DATA LINK -
-BAT.
DIG SNSR PWR (+8V)
-BAT.
REMOTE SHUTDOWN SW
KEYSWITCH
+BAT. (UNSWITCHED)
+BAT. (UNSWITCHED)
+BAT. (UNSWITCHED)
-BAT. (NOTE A)
-BAT. (NOTE A)
-BAT. (NOTE A)
P1/J1
35
44
68
66
41
59
23
40
28
29
21
20
19
42
34
50
5
13
38
39
8
9
67
4
69
22
70
48
52
53
61
63
65
P501/J501
F793/OR
G850/BU
INLET AIR
HEATER
250T265-OR-4
391/PK
229/BK
J515/P515
051T028
G850/BU
F793/OR
CB
(135-7893)
135A
MAX LENGTH 0.8 METERS
14 AWG
14 AWG
FROM ECM P2
14 AWG
14 AWG
14 AWG
14 AWG
TRIP CLEAR SW
34
35
4
10
37
38
39
19
28
23
21
20
22
25
24
16
18
17
13
12
14
15
7
6
30
2
P61/J61
CUSTOMER
CONNECTOR
TEE CONNECTOR
(133-0970)
+
BAT.
SIGNAL
SLOW VESSEL MODE SW
MAINTENANCE CLEAR SW
TROLLING MODE SW
HOUR METER
(6T-7337)
+
-
(153-2707)
(NOTE K & L)
120
GND
TERMINATION
ENABLE DISPLAY (+BAT SWITCHED)
DISPLAY PWR (+BAT)
DISPLAY GND (-BAT)
RESISTOR
(134-2540)
(NOTE J & L)
MAX LENGTH 1 METER
(NOTE W)
MARINE
POWER
DISPLAY
A
B
C
TERMINATION
RESISTOR
(134-2540)
(NOTE J & L)
120
A
B
C
(HIGH COOLANT TEMP LAMP)
(LOW OIL PRESS. LAMP)
(DIAGNOSTIC LAMP)
(MAINTENANCE LAMP)
(WARNING LAMP)
(NOTE D)
(NOTE D)
(NOTE D)
(NOTE D)
SYNC SWITCH
P35 (HD)
PRIMARY THROTTLE
POSITION SENSOR
(9X-9648) OR (121-7029)
(NOTE C & F)
SIG
-BAT.
+BAT.
C
B
A
(NOTE D)
(NOTE D)
TACHOMETER
KEYSWITCH
-BAT.
UNUSED
UNUSED
CAT DATA LINK +
CAT DATA LINK -
UNUSED
UNUSED
UNUSED
J42
CUST SUPPLIED ENG
SERVICE TOOL CONN
A
B
J
H
D
E
C
F
G
A
B
C
C
A
B
A
10
11
12
9
7
8
B
C
SYNC SWITCH 1
SYNC SWITCH 2
SECONDARY THROTTLE POSITION
PRIMARY THROTTLE POSITION
TROLLING MODE SW
SLOW VESSEL MODE SW
MAINTENANCE CLEAR SW
TRIP CLEAR SW
LOW OIL PRESS. LAMP
HIGH COOLANT TEMP LAMP
MAINTENANCE IND LAMP
WARNING LAMP
DIAGNOSTIC LAMP
J1939 SHIELD
J1939 DATA -
J1939 DATA +
HOUR METER -
HOUR METER +
TACHOMETER +
TACHOMETER -
CAT DATA LINK + (NOTE M & N)
CAT DATA LINK - (NOTE M & N)
KEYSWITCH
- BAT.
-
INPUT SIGNAL WIRES
OUTPUT SIGNAL WIRES
SENSOR SUPPLY VOLTAGE
(+) BATTERY SUPPLY WIRES
DATA LINK PLUS
(-) BATTERY / SENSOR RETURN
DATA LINK MINUS
ALL DASHED LINES ARE ATTACHMENTS.
J1/P99 (NOTE R)
(REF 121-4017 AND 117-1575)
QUAD GAUGE GROUP
TACHOMETER
EMS UNIT
6
5
4
3
2
1
31
3
40
39
38
37
36
32
30
29
28
27
26
24
22
21
19
18
17
16
35
34
25
15
12
11
10
9
8
6
1
2
20
23
14
5
7
13
4
33
6
5
4
3
2
1
OPTIONAL
CATERPILLAR
COMPUTERIZED
DISPLAY MODULE
1
2
3
4
5
6
7
8
9
10
11
12
(NOTE P)
+BAT
.
-BAT
US/METRIC
SCROLL FORWARD
CAT DATA LINK -
CAT DATA LINK +
MON XMSN TEMP/PRESS
.
WARNING/ALARM LAMP
BACKLIGHT LAMP PWR
SCROLL BACKWARD
(NOTES T & U)
(NOTES S & U)
NOTE J: MAXIMUM LENGTH OF DATA BUS (TERMINATION RESISTOR
TO TERMINATION RESISTOR) IS 40 METERS.
NOTE L: REFER TO THE INSTALLATION GUIDE FOR ADDITIONAL
INSTALLATION DETAILS.
NO ADDITIONAL CONNECTIONS ARE ALLOWED TO ANY WIRES
WITHOUT CATERPILLAR ENGINEERING APPROVAL.
UNLESS OTHERWISE SPECIFIED: ALL WIRES CONNECTED TO J2 TO BE 16
OR 18 AWG, ALL OTHER WIRES TO BE 16 AWG OR LARGER SAE J1128
TYPE SXL OR EQUIVALENT.
NOTE K: USE RECOMMENDED CABLE OR EQUIVALENT PER SAE J1939
SPECIFICATIONS FOR ALL J1939 DATA LINK CONNECTIONS.
NOTE F: DO NOT ENGINE MOUNT
ELIMINATION OF ANY COMPONENTS SHOWN WILL DISABLE CERTAIN ENGINE
FEATURES. CONTACT CATERPILLAR ENGINEERING WHEN CONSIDERING
COMPONENT REMOVAL.
CUSTOMER WIRING AND OPTIONAL FEATURE WIRING ARE RECOMMENDED
NOTE G: REQUIRED CIRCUIT PROTECTION. CIRCUIT PROTECTION
WILL VARY BASED ON THE NUMBER AND TYPE OF DISPLAYS.
SEE INSTALLATION GUIDE.
NOTE E: AN ENGINE SHUTDOWN SWITCH SHOULD BE INSTALLED
AT EACH STATION TO SHUTDOWN THE ENGINE
WITHOUT REMOVING POWER TO THE ECM.
NOTE A: (-) BAT ON THE CUSTOMER CONNECTOR MUST BE CONNECTED DIRECTLY TO
THE (-) BAT BUS BAR AND NOT CONNECTED TO (-) BAT THROUGH ANY OTHER
INDIRECT PATH.
NOTE N: 30 METER MAXIMUM TOTAL LENGTH FROM P61 TO ALL
THIS DIAGRAM IS FOR THE
3126B MARINE ENGINE
(177-1683 CH-04)
OTHER CONNECTIONS.
NOTE C: CATERPILLAR SUPPLIED, SHIPPED LOOSE WITH ENGINE. USE IS
CUSTOMER'S OPTION.
NOTE B: 0.3A CURRENT LIMIT ON EACH OPTIONAL OUTPUT DRIVER.
NOTE D: INTERFACE TO ADDITIONAL ENGINES. FOR DETAILED INSTALLATION
REFER TO 3126B MARINE ENGINE INSTALLATION GUIDE.
NOTE M: CAT DATA LINK MUST BE UNSHIELDED TWISTED PAIR
OF 18 AWG OR LARGER WIRE. ONE TWIST PER 25.4 MIN.
NOTE U: CONNECT PIN 3 & 31 ON EMS CONNECTOR FOR CENTER EMS.
NOTE V: SENSOR NOT AVAILABLE ON ALL ENGINES.
NOTE W: MARINE POWER DISPLAY OR OTHER J1939 DEVICES MAY BE USED.
NOTE T: CONNECT PIN 31 ON EMS CONNECTOR FOR PORT EMS.
NOTE S; CONNECT PIN 3 ON EMS CONNECTOR FOR STARBOARD EMS.
NOTE R: CONNECTOR P99 IS MATING CONNECTOR FOR CONNECTOR J1
SHOWN ON EMS SYSTEM ASSEMBLY DIAGRAM.
NOTE P: WHEN CONNECTED TO (-) BAT, THIS CONNECTION DISABLES
THE TRANSMISSION TEMPERATURE AND TRANSMISSION PRESSURE
DISPLAY ON THE CMS AND THE EMS. THIS OPTION CAN BE USED
FOR INSTALLATIONS THAT DO NOT REQUIRE A TRANSMISSION.
kPa RPM SERV CODE
x10
RPM
#1
RPM
#2
0
5
10
15
20
25
30
X100
MPH
km/h
No. Function Wire Ident No. Function Wire Ident
1 + Battery Unswitched 101/RD 21 High Coolant Temperature Lamp F401/GY
2 - Battery Bus Bar 229/BK 22 Maintenance Indicator Lamp F424/YL
3 - Battery Bus Bar 229/BK 23 Low Oil Pressure Lamp F400/GY
4 Secondary Throttle Position M972/PK 24 Diagnostic Lamp F429/BU
5 + Battery Unswitched 101/RD 25 Warning Lamp F473/YL
6 Cat Data Link - 945/BR 26 N/C -
7 Cat Data Link + 944/OR 27 N/C -
8 + Battery Unswitched 101/RD 28 N/C -
9 - Battery 229/BK 29 Remote Start 391/PK
10 Primary Throttle Position M971/BR 30 + Battery Switched (Key) J906/BR
11 N/C - 31 N/C -
12 Hour Meter + F427/PK 32 N/C -
13 Hour Meter - L464/BR 33 N/C -
14 Tachometer + 450/YL 34 Sync Switch Input 1 M973/BR
15 Tachometer - 451/BR 35 Sync Switch Input 2 M974/YL
16 J1939 Shield A234/BK (Copper) 36 Shutdown Input G966/PU
17 J1939 Data + K900/YL 37 Trolling Mode F425/PU
18 J1939 Data - K990/GN 38 Slow Vessel Mode R819/GY
19 Trip Clear Switch L460/YL 39 Maintenance Clear F426/BU
20 N/C - 40 N/C -
J61 Customer Pin Out
HarnessSide
HarnesECM Connector P1
ECM Connector P2
sSide
ECMSide
ECMSide
ECM AMP Connectors
ELECTRONIC
CONTROL
MODULE
(-) BATTERY BUS BAR
(-) BATTERY BUS BAR
B
A
B
A
B
A
B
A
B
A
B
A
