Hummer H1 (2006+). Manual - part 163
OBD-496
On-Board Diagnostics
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38 WAY ENGINE CONNECTOR HARNESS LOCATION: ON TOP OF ENGINE
C1
211
YL
SAE J1939 CAN HI
C2
C3
106
GY
EGR valve (5 volt signal)
C4
108
OR/BK
EGR valve high control
C5
109
LG/BK
EGR valve low control
C6
614
GY
MAP sensor (5 volt signal)
C7
616
OR/BK
MAP
C8
615
LG
MAP sensor signal
PIN
CKT
COLOR
DESCRIPTION
A1
239
PK
Engine ignition feed
A2
A3
A4
1042
RD
Ignition 1 voltage
A5
1042
RD
Ignition 1 voltage
A6
A7
623
YL
Engine coolant temperature signal
A8
624
GY
Coolant temperature sensor
B1
631
LG/BK
Fuel injector 2 request
B2
636
RD/BK
Injector 7 request
B3
254
RD
CAM sensor (5 volt signal)
B4
253
BR/WH
Cam sensor signal ref 4X
B5
156
PK/BK
Cam sensor ground
B6
B7
B8
258
YL/BK
Crank sensor
B9
256
DB/WH
Crank sensor signal
B10
257
LG
Crank shaft sensor signal
PIN
CKT
COLOR
DESCRIPTION
PIN A1
PIN B1
PIN C1
PIN D1
PIN A8
PIN B12
PIN C12
PIN D8
CAV A8
CAV B12
CAV C12
CAV D8
CAV A1
CAV B1
CAV C1
CAV D1
C82 MALE
C82 FEMALE