ECM Connectors Pinouts:
Blue Connector - J1
Cavity
Circuit
Size(mm)
2
7446
0.5
4
3200
0.5
5
3201
0.5
8
7447
0.5
14
1164
0.5
15
1161
0.5
24
7445
0.5
30
1271
0.5
33
1274
0.5
34
1162
0.5
36
7493A
0.5
37
7494A
0.5
39
2500
0.5
40
2501
0.5
41*
2918
0.5
42
CFN2C
0.5
43
C818
0.75
44
465
0.5
46
419
0.5
51
439A
0.5
52
740
0.5
53
1272
0.5
59
2366
0.5
60
5291
0.5
64
C20
0.5
67
5292
0.75
72
5991A
0.5
73
5290B
2.5
*Dependent on harness
LT1 Based Engine Control System
ALL INFORMATION WITHIN ABOVE
Date
BORDER TO BE PRINTED EXACTLY
03MY19
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Color
LB/WT
Fuel Line Pressure Sensor Signal
YL/WT
Throttle Inlet Absolute Pressure Sensor Signal
WT/RD
Throttle Inlet Absolute Pressure Sensor 5V Reference
BK/YL
Fuel Line Pressure Sensor Low Reference
WT/RD
Accelerator Pedal Position 5 Volt Reference (1)
YL/WT
Accelerator Pedal Position Signal (1)
BR/RD
Fuel Line Pressure Sensor 5V Reference
BK/LB
Accelerator Pedal Position Low Reference (1)
BR/RD
Accelerator Pedal Position 5 Volt Reference (2)
LG/WT
Accelerator Pedal Position Signal (2)
LB/BK
High Speed GMLAN Serial Data (+)(3)
WTHigh
Speed GMLAN Serial Data (-)(3)
LBHigh
Speed GMLAN Serial Data (+)(1)
WTHigh
Speed GMLAN Serial Data (-)(1)
BU/WH
Fuel Rail Pressure Sensor Signal
BL/RD
Fan2 Control
BN
Vehicle Speed Output
LG/GY
Fuel Pump Primary Relay Control
BR/WT
Check Engine Indicator Control
VT/LG
Run/Crank Ignition 1 Voltage
RD/YL
Battery
BK/VT
Accelerator Pedal Position Low Reference (2)
WT/BK
Cooling Fan Control Relay Speed Signal
VT/LB
Powertrain Main Relay Fused Supply (2)
YE
Top of Travel Clutch Switch
VT/LB
Powertrain Main Relay Fused Supply (3)
YL
Powertrain Relay Coil Control
VT/LB
Powertrain Main Relay Fused Supply (1)
Revision
Init Rel – Blake Nye
Circuit Description
PART No.
IR 03MY19
19418601
Auth
DR
Title
NA
LT1 Based Engine Control System
PART No.
SHEET
Installation Instructions
19418601
9 of 33
SHEET 9 of 33