Hummer H1 (2006+). Manual — part 161
OBD-488
On-Board Diagnostics
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72 WAY ECM J2 (BLACK) LOCATION: DRIVERSIDE UNDER ECM
PIN
CKT
COLOR
DESCRIPTION
1
2
507
OR/BK
Fuel rail pressure signal
3
4
5
232
BR
CAN shield
6
7
784
DB
T-case range switch input to the ECM (-)
8
107
BK
EGR stepper motor
9
10
11
12
13
14
624
GY
Coolant temperature sensor
15
16
17
18
19
718
DB
APP sensor 1 signal
20
21
661
GN
Transmission control module MIL request
22
23
615
LG
MAP sensor signal
C76 Female
_____________________________________________
On-Board Diagnostics OBD-489
5745804
24
724
DG
APP sensor 3 signal
25
619
TN/WH
Oil pressure sensor signal
26
27
324
YL
Fuel temperature sensor signal
28
257
LG
Crank shaft sensor signal
29
251
BK
MAF sensor ground
30
616
OR/BK
MAP
31
368
WH
VNT valve position
32
33
108
OR/BK
EGR valve high control
34
244
BK
Ground
35
109
LG/BK
EGR valve low control
36
244
BK
Ground
37
38
39
618
BK
Engine oil pressure
40
719
BR
APP 1
41
42
509
YL
Fuel pressure regulator sensor signal
43
44
369
BR
VNT position sensor
45
46
613
GY/BK
Baro sensor signal
47
48
49
362
DB
Turbocharger vane position control solenoid valve high
50
363
WH
Turbocharger vane position control solenoid valve low
51
52
632
PK/BK
Injector 3 request
53
110
OR/BK
EGR valve, high control
54
722
PP
APP 2
55
111
LG/BK
EGR valve, low control
56
725
GY
APP 3
57
58
250
BK
Intake air temperature sensor
59
60
520
WH
Brake lamp switch
61
809
TN
TCC brake switch/cruise control release signal
62
63
660
LB
57x signal to the FICM
64
PIN
CKT
COLOR
DESCRIPTION
OBD-490
On-Board Diagnostics
_____________________________________________
56 WAY ECM (GRAY) LOCATION: DRIVERSIDE UNDER ECM
65
631
LG/BK
Fuel injector 2 request
66
636
RD/BK
Injector 7 request
67
623
YL
Engine coolant temperature signal
68
637
DB/BK
Fuel injector 8 request
69
633
LB/BK
Injector 4 request
70
634
BK/WH
Injector 5 request
71
635
YL/BK
Fuel injector 6 request
72
630
BK
Fuel injector 1 request
73
1057
BK
Ground
PIN
CKT
COLOR
DESCRIPTION
1
2
3
4
5
6
7
8
243
PK
+12v Ignition input
9
10
514
PK
Ignition 1 Voltage
11
12
497
YL
Vehicle speed sensor high
13
14
514
PK
Ignition 1 Voltage
15
PIN
CKT
COLOR
DESCRIPTION
C77 Female
_____________________________________________
On-Board Diagnostics OBD-491
5745804
16
17
18
331
WH
Crank request
19
152
DB
Cruise control SET/COAST switch signal
20
439
YL
A\C request
21
22
153
LG
Cruise RESUME\ACCELERATE
23
498
DG
Vehicle speed sensor low
24
653
YL
Intake air temperature signal
25
26
27
28
714
DB
Check throttle lamp activation
29
30
151
GY
Cruise control “ON” switch signal
31
330
PP
PRNDL switch
32
33
34
35
332
BK
Starter relay
36
37
644
YL
Tach signal
38
39
40
658
BR
Malfunction indicator lamp
41
410
LG
A\C clutch relay
42
43
258
YL/BK
Crank sensor
44
244
BK
Ground
45
140
OR
Transmission reverse switch
46
47
48
252
BR
Fuel temperature sensor
49
50
51
253
BR/WH
Cam sensor signal
52
266
DB/WH
Crank sensor signal
53
54
55
56
PIN
CKT
COLOR
DESCRIPTION
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