3126B ENGINE FOR CLASS COMBINE APPLICATIONS ELECTRICAL SYSTEM

©
2001 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR9577
July 2001
3126B Engine For Claas
Electrical System
BEJ1-UP
DCS1-UP
Combine Applications
DT Connector Receptacle DT Connector Plug
Plug Wedge
Plug Wedge
Plug Wedge
Receptacle Wedge
Receptacle Wedge
Receptacle Wedge
HD Connector Receptacle
HD Connector Plug
Pin Contact
Sealing Plug
Socket Contact
Speed/Timing Sensor Connectors
150 Series Receptacle
IAPCV Connector
150 Series Plug
HarnessSide
ECM Connector P1
ECM Connector P2
Harness Side
ECMSide
ECMSide
ECM Connectors
INLET AIR
HEATER
INLET AIR
HEATER
RELAY
AIR INLET
GROUND STUD
GROUND
STRAP
30
87A
87
85
86
2
1
6
3
7
8
5
4
11
10
9
12
16
2
1
3
4
5
6
7
8
9
15
11
12
13
14
10
2
22
21
1
3
1
2
J501/P501
COMPONENTS ARE SHOWN WITH THE KEY OFF
ALTERNATOR
+
GND
F59
F70FUSE
F34
-
+
12V
BATTERY
K53
START
RELAY
FROM K13/87A
TO MACHINE HARNESSTO MACHINE
ENGINE SENSORS
TO MACHINE HARNESS
FROM K51/87
TO OEM FUSES
BATTERY
DISCONNECT
SWITCH
SG
BATMTR
STARTING
MOTOR
J1 P1
1
6
7
12
UNUSED
UNUSED
UNUSED
UNUSED
13
14
16
18
UNUSED
UNUSED
UNUSED
UNUSED
24
25
26
28
UNUSED
UNUSED
UNUSED
DIAGNOSTIC LAMP
31
33
32
UNUSED
UNUSED
UNUSED
30
UNUSED
36
51
37
UNUSED
UNUSED
UNUSED
62
68
69
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
55
UNUSED
35
UNUSED
RD
RD
57
43
39
48
11
67
46
17
5
66
15
3
22
23
21
2
4
BR/WH
BL/YL
40
44
45
64
41
56
10
58
BL
BL/YL
BL
GR/BR
GR
20
29
19
70
8
9
38
60
YL
WH
ELECTRONIC CONTROL MODULE (ECM)
DIAGNOSTIC ENABLE SW
KEY ENGINE CRANK
BR/YL54COOLANT LEVEL
KEY ON
CAT DATA LINK -
CAT DATA LINK +
+BAT.(UNSWITCHED)
COOLANT LEVEL RETURN
A +BAT.
START SWITCH
J
D
E
G
H
F
C
CAT DATA LINK -
CAT DATA LINK +
- BAT.B
SERVICE TOOL CONN
DIAGNOSTIC
ENABLE
SWITCH
DIAGNOSTIC
LAMP
120
B
A
C
TERMINATION
RESISTOR
COOLANT LEVEL
SWITCH
J1939
RD
RD
CONN MD
CONN G
CONN C
22 PIN
WH
YL
RD
27
52
53
59
49
47
42
50
BR
BR
34
61
63
-BAT.
-BAT.
BR/BL
OR/BL
YL/BL
+BAT.(UNSWITCHED)
+BAT.(UNSWITCHED)
J1939 SHIELD
J1939 DATA +
J1939 DATA -
J1939 SHIELD
J1939 DATA +
J1939 DATA -
BR65
-BAT.
5
6
8
3
7
1
INPUT SIGNAL WIRES TO ECM
OUTPUT SIGNAL WIRES FROM ECM
SENSOR SUPPLY VOLTAGE
(+) BATTERY SUPPLY WIRES
SIGNAL PLUS
(-) BATTERY / SENSOR RETURN
SIGNAL MINUS
CIRCUIT
BREAKER
CIRCUITS WITHIN THIS AREA ARE RECOMMENDATIONS
LEFT SIDE VIEW
Engine Oil
Pressure
Sensor
Engine Oil
Pressure
Sensor
(Optional Location)
Fuel
Pressure
Sensor
(Optional Location)
(Optional Location)
Intake Manifold
Air Temperature
Sensor
Primary
Speed/Timing
Sensor
Secondary
Speed/Timing
Sensor
Injection
Actuation
Pressure
Control Valve
(IAPCV)
Injector
Harness
Grommet
Atmospheric
Pressure
Sensor
Intake Manifold
Air Temperature
Sensor
Injection
Actuation
Pressure
Sensor
Engine Coolant
Injector
Harness
Connector
P300/J300
Inlet Air
Heater
Relay
Temperature
Sensor
Engine Oil
Temperature
Sensor
ECM
Connector
J2/P2
ECM
Connector
J1/P1
Turbo Outlet
Pressure Sensor
(Intake Manifold Air)
Fuel
Pressure
Sensor
Probe
Timing
Calibration
Connector
P400
G850/BUINLET AIR HEATER
C987/RD
IAH RELAY RETURN
INJECTOR
CYLINDER
NO.1
P301/J301
B
A
INJECTOR
CYLINDER
NO.2
P302/J302
B
A
INJECTOR
CYLINDER
NO.3
P303/J303
B
A
INJECTOR
CYLINDER
NO.4
P304/J304
B
A
INJECTOR
CYLINDER
NO.5
P305/J305
B
A
INJECTOR
CYLINDER
NO.6
P306/J306
B
A
PRIMARY
SPEED/TIMING SENSOR
TURBO OUTLET
PRESSURE SENSOR
(INTAKE MANIFOLD AIR)
(161-9928)
ENGINE COOLANT
TEMPERATURE SENSOR
(130-9811)
SECONDARY
SPEED/TIMING SENSOR
1E963/BK
P401/J401
+5V
2
E965/BU
E966/YL
E964/WH
1
2
A
C
B
G828/WH
A746/PK
G829/GN
995/BU
G833/PK
P200/J200
P100/J100
P402/J402
SIGNAL
RETURN
SIGNAL
COMMON
SIGNAL -
SIGNAL +
SIGNAL -
SIGNAL +
ENGINE OIL PRESSURE
SENSOR
(161-1705)
ATMOSPHERIC PRESSURE
SENSOR
(161-9925)
ENGINE OIL
TEMPERATURE SENSOR
(191-6587)
INTAKE MANIFOLD AIR
TEMPERATURE SENSOR
(130-9811)
FUEL PRESSURE SENSOR
(161-9931)
+5V
+5V
+5V
A
C
B
C
AG828/WH
994/GY
G828/WH
A747/GY
G829/GN
2
A
1401/BU
G833/PK
G828/WH
G829/GN B
J209/P209
J101/P101
P201/J201
J203/P203
C
B
1
2
413/BR
G829/GN
C967/BU
G833/PK
P103/J103
SIGNAL
RETURN
SIGNAL
RETURN
SIGNAL
RETURN
SIGNAL
COMMON
SIGNAL
COMMON
L983/WH
L983/WH
L984/OR
L984/OR
L985/YL
L985/YL
A706/GY
A705/BU
12
8
10
6
5
J300/P300
INJECTOR HARNESS
GROMMET
A704/GN
A703/BR
A702/PU
A701/GY
TIMING
CALIBRATION
PROBE
CONNECTOR
4
3
1
2
9
7
11
2
1
G857/YL
G856/WH
P400
J2/P2
44
45
46
54
39
38
37
36
23
22
49
55
INJECTOR COMMON 1 & 2
INJECTOR COMMON 3 & 4
INJECTOR COMMON 5 & 6
INJECTOR 6
INJECTOR 5
INJECTOR 4
INJECTOR 3
INJECTOR 2
INJECTOR 1
TIMING CALIBRATION PROBE -
TIMING CALIBRATION PROBE +
PRIMARY SP/TMG SIG -
48
59
58
32
18
2
3
40
UNUSED
UNUSED
UNUSED
UNUSED
24
33
16
35
1
4
5
6
14
PRIMARY SP/TMG SIG +
SECONDARY SP/TMG SIG -
SECONDARY SP/TMG SIG +
COOL. TEMP. SNSR
PASSIVE SNSR COMMON
ANALOG SNSR POWER (+5V)
ANALOG SNSR COMMON
INLET MANIFOLD AIR PRESS. SNSR
ATMOSPHERIC PRESS. SNSR
ENG OIL PRESS. SNSR
UNUSED
FUEL PRESS. SNSR
INLET MANIFOLD AIR TEMP. SNSR
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
7
8
10
11
13
15
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
19
20
21
25
26
28
29
UNUSED
17
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
30
31
41
42
43
47
50
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
52
53
56
57
60
UNUSED
51
L983/WH
L984/OR
L985/YL
A706/GY
A705/BU
A704/GN
A703/BR
A702/PU
A701/GY
G857/YL
G856/WH
E963/BK
E964/WH
E965/BU
E966/YL
995/BU
G833/PK
G828/WH
G829/GN
A746/PK
A747/GY
994/GY
413/BR
C967/BU
UNUSED
UNUSED
UNUSED
UNUSED
UNUSED
64
65
66
67
68
69
70
9
12
UNUSED
63
ELECTRONIC CONTROL MODULE (ECM)
2
1
ENGINE OIL TEMP. SNSR 34
IAP CONTROL VALVE - 62
IAP CONTROL VALVE + 61
INJ. ACTUATION PRESS. SNSR 27
INJECTOR ACTUATION
PRESSURE SENSOR
(167-1708)
+5V
A
G828/WH
J204/P204
C
B
G849/BR
G829/GN
SIGNAL
RETURN
INJECTOR ACTUATION
PRESSURE CONTROL VALVE
(IAPCV)
2
1G854/PK
G855/PU
P500/J500
SIGNAL +
SIGNAL -
G849/BR
G854/PK
G855/PU
401/BU
(169-3300)
G850/BU
C987/RD
G850/BU
C987/RD