2008 Hummer H2 L92 Wiring Diagram + Pinout
#2
The only free E38 info that I know of is here. Its for the vette but it might get you started.
http://www.ls2.com/forums/showthread...hreadid=405808
http://www.ls2.com/forums/showthread...hreadid=405808
#3
I've got some printouts from a local dealership (for the '08 Yukon/Tahoe series of trucks), but they printed out so small that I'd have to use a flatbed scanner to digitize them, & then see if I could resize them to at least 150% of what they are now...
#4
I have been down that road. You will figure out some things but a lot of things don't match up. I went to alldatadiy.com. twenty some odd dollars for a year subscription. you can print all you want. Or you can go to repairprocedures.com and get one day for free.
#5
Originally Posted by 1939 Ford
Or you can go to repairprocedures.com and get one day for free.
#6
I checked the parts cross reference and the computer for the Hummer was the same as 08 impala, G6, and 1500/2500 GM trucks. Since the computer is the same, wouldn't the pinouts be the same?
I found an 08 silverado diagram here in the link below. Thoughts?
https://ls1tech.com/forums/pcm-diagn...silverado.html
I found an 08 silverado diagram here in the link below. Thoughts?
https://ls1tech.com/forums/pcm-diagn...silverado.html
#7
here is the ECU pin out first connector......................................... ............
Service: 88988931
Description: 73-Way F MX123 34566 Series, Sealed (BK)
Engine Control Module (ECM) X1 Pin
Wire
Circuit
Function
1
0.5 OG/BK
1786
Park/Neutral Signal
2-8
--
--
Not Used
9
0.5 L-BU/WH
6311
TCC Brake Signal
10
0.5 PU/WH
1668
HO2S High Signal - Bank 1 Sensor 2
11
0.5 TN/WH
1669
HO2S Low Signal - Bank 1 Sensor 2
12
0.5 OG/BK
380
A/C Refrigerant Pressure Sensor Signal
13
0.5 TN
5514
Low Reference
14-15
--
--
Not Used
16
0.5 PU
1589
Fuel Level Sensor Signal - Primary
17
0.5 D-BU
473
High Speed Cooling Fan Relay Control
18
0.5 D-BU
5985
Accessory Wakeup Serial Data
19
0.5 PK
439
Ignition Voltage
20
0.5 RD/WH
440
Battery Positive Voltage
21-22
--
--
Not Used
23
0.5 PU
1272
Low Reference
24
0.5 D-GN
890
Fuel Tank Pressure Sensor Signal
25- 26
--
--
Not Used
27
0.5 TN
2501
High Speed GMLAN Serial Data Bus -
28
0.5 TN/BK
2500
High Speed GMLAN Serial Data Bus+
29
0.5 D-BU
1161
APP Sensor 1 Signal
30
0.5 BN
1271
Low Reference
31
0.5 TN/BK
6049
Low Reference
32
0.5 L-BU
1162
APP Sensor 2 Signal
33
0.5 GY
2709
5-Volt Reference 1
34
0.5 GY
2700
5-Volt Reference 1
35
--
--
Not Used
36
0.5 TN
1274
5-Volt Reference 1
37
0.5 TN
472
IAT Sensor Signal
38
0.5 TN
2760
Low Reference
39-40
--
--
Not Used
41
0.5 YE
492
MAF Sensor Signal
42-46
--
--
Not Used
47
0.5 PK
1339
Ignition Voltage
48
--
--
Not Used
49
0.5 TN
1671
HO2S Low Signal - Bank 2 Sensor 2
50
0.5 D-GN/WH
465
Fuel Pump Relay Control - Primary
51
--
--
Not Used
52
0.5 YE/BK
625
Starter Enable Relay Control
53-55
--
--
Not Used
56
0.5 WH/BK
1164
5-Volt Reference 2
57
--
--
Not Used
58
0.5 D-GN
335
Low Speed Cooling Fan Relay Control
59
0.5 YE
5991
Powertrain Relay Coil Control
60
--
--
Not Used
61
0.5 WH
1310
EVAP Canister Vent Solenoid Control
62
--
--
Not Used
63
0.5 D-GN/WH
459
A/C Compressor Clutch Relay Control
64
0.5 OG/WH
3223
HO2S Heater Low Control - Bank 2 Sensor 2
65
0.5 GY/WH
3122
HO2S Heater Low Control - Bank 2 Sensor 1
66-67
--
--
Not Used
68
0.5 BN/WH
419
MIL Control
69
0.5 PU
1670
HO2S High Signal - Bank 2 Sensor 2
70
--
--
Not Used
71
0.5 PU/WH
821
VSS High Signal
72
0.5 L-GN/BK
822
VSS Low Signal
73
3 BK/WH
451
Ground
second connector......................................... .................................................
Description: 80-Way F MX123 Series, Sealed (GY)
Engine Control Module (ECM) X2 Pin
Wire
Circuit
Function
1
--
--
Not Used
2
0.5 PU/WH
6270
5-Volt Reference 2
3
0.5 GY
2701
5-Volt Reference 2
4
--
--
Not Used
5
0.5 BN
582
TAC Motor Control - 2
6
0.5 YE
581
TAC Motor Control - 1
7
--
--
Not Used
8
0.8 D-GN/WH
428
EVAP Canister Purge Solenoid Control
9-11
--
--
Not Used
12
0.5 GY/WH
3113
HO2S Heater Low Control - Bank 1 Sensor 1
13
0.5 L-GN
3212
HO2S Heater Low Control - Bank 2 Sensor 1
14-15
--
--
Not Used
16
0.5 PU
5284
Camshaft Actuator Solenoid Control
17
0.75 D-BU
878
Fuel Injector 8 Control
18
0.75 WH/BK
845
Fuel Injector 5 Control
19
0.75 YE/BK
846
Fuel Injector 6 Control
20
0.75 TN
1744
Fuel Injector 1 Control
21
0.5 YE
410
ECT Sensor Signal
22
0.5 TN
2761
Low Reference
23-25
--
--
Not Used
26
0.8 D-BU
496
Knock Sensor 1 Signal
27
0.8 GY
1716
Knock Sensor 1 Signal
28
--
--
Not Used
29
0.8 L-BU
1876
Knock Sensor 2 Signal
30
0.8 GY
2303
Knock Sensor 2 Signal
31
--
--
Not Used
32
0.5 GY
23
Generator Field Duty Cycle Signal
33
--
--
Not Used
34
0.5 BK
2755
Low Reference
35
0.5 TN
2752
Low Reference
36
--
--
Not Used
37
0.5 L-GN
1745
Fuel Injector 2 Control
38
0.5 RD/BK
1746
Fuel Injector 3 Control
39
0.75 D-BU/RD
844
Fuel Injector 4 Control
40
0.75 BK/OG
877
Fuel Injector 7 Control
41
0.5 GY
2705
5-Volt Reference 1
42
--
--
Not Used
43
0.5 GY
2704
5-Volt Reference 1
44
0.5 D-BU
6259
5-Volt Reference 1
45-49
--
--
Not Used
50
0.5 TN/WH
331
Oil Pressure Sensor Signal
51
--
--
Not Used
52
0.5 TN
2199
Low Reference
53
0.5 OG/BK
469
Low Reference
54-55
--
--
Not Used
56
0.5 TN
1664
HO2S Low Signal - Bank 1 Sensor 1
57
0.5 PU/WH
1665
HO2S High Signal - Bank 1 Sensor 1
58
0.5 L-GN
432
MAP Sensor Signal
59
0.5 PU
1666
HO2S High Signal - Bank 2 Sensor 1
60
0.5 TN
1667
HO2S Low Signal - Bank 2 Sensor 1
61
0.5 BN
25
Charge Indicator Control/Charge Indicator Signal
62
--
--
Not Used
63
0.5 PU
486
TP Sensor 2 Signal
64
0.5 D-BU/WH
6265
CMP Sensor Signal
65
0.5 D-GN
485
TP Sensor 1 Signal
66
0.5 BN
6266
Low Reference
67
--
--
Not Used
68
0.5 WH/BK
6271
CKP Sensor Signal
69
0.5 GY/BK
6272
Low Reference
70
0.5 PU
2121
IC 1 Control
71
0.5 PU/WH
2128
IC 8 Control
72
0.5 OG
2127
IC 7 Control
73
0.5 OG/WH
2122
IC 2 Control
74
0.5 L-BU/WH
2126
IC 6 Control
75
0.5 D-GN
2125
IC 5 Control
76
0.5 D-GN/WH
2124
IC 4 Control
77
0.5 L-BU
2123
IC 3 Control
78
0.5 BN
2129
Low Reference
79
0.5 BN/WH
2130
Low Reference
80
--
--
Not Used
Service: 88988931
Description: 73-Way F MX123 34566 Series, Sealed (BK)
Engine Control Module (ECM) X1 Pin
Wire
Circuit
Function
1
0.5 OG/BK
1786
Park/Neutral Signal
2-8
--
--
Not Used
9
0.5 L-BU/WH
6311
TCC Brake Signal
10
0.5 PU/WH
1668
HO2S High Signal - Bank 1 Sensor 2
11
0.5 TN/WH
1669
HO2S Low Signal - Bank 1 Sensor 2
12
0.5 OG/BK
380
A/C Refrigerant Pressure Sensor Signal
13
0.5 TN
5514
Low Reference
14-15
--
--
Not Used
16
0.5 PU
1589
Fuel Level Sensor Signal - Primary
17
0.5 D-BU
473
High Speed Cooling Fan Relay Control
18
0.5 D-BU
5985
Accessory Wakeup Serial Data
19
0.5 PK
439
Ignition Voltage
20
0.5 RD/WH
440
Battery Positive Voltage
21-22
--
--
Not Used
23
0.5 PU
1272
Low Reference
24
0.5 D-GN
890
Fuel Tank Pressure Sensor Signal
25- 26
--
--
Not Used
27
0.5 TN
2501
High Speed GMLAN Serial Data Bus -
28
0.5 TN/BK
2500
High Speed GMLAN Serial Data Bus+
29
0.5 D-BU
1161
APP Sensor 1 Signal
30
0.5 BN
1271
Low Reference
31
0.5 TN/BK
6049
Low Reference
32
0.5 L-BU
1162
APP Sensor 2 Signal
33
0.5 GY
2709
5-Volt Reference 1
34
0.5 GY
2700
5-Volt Reference 1
35
--
--
Not Used
36
0.5 TN
1274
5-Volt Reference 1
37
0.5 TN
472
IAT Sensor Signal
38
0.5 TN
2760
Low Reference
39-40
--
--
Not Used
41
0.5 YE
492
MAF Sensor Signal
42-46
--
--
Not Used
47
0.5 PK
1339
Ignition Voltage
48
--
--
Not Used
49
0.5 TN
1671
HO2S Low Signal - Bank 2 Sensor 2
50
0.5 D-GN/WH
465
Fuel Pump Relay Control - Primary
51
--
--
Not Used
52
0.5 YE/BK
625
Starter Enable Relay Control
53-55
--
--
Not Used
56
0.5 WH/BK
1164
5-Volt Reference 2
57
--
--
Not Used
58
0.5 D-GN
335
Low Speed Cooling Fan Relay Control
59
0.5 YE
5991
Powertrain Relay Coil Control
60
--
--
Not Used
61
0.5 WH
1310
EVAP Canister Vent Solenoid Control
62
--
--
Not Used
63
0.5 D-GN/WH
459
A/C Compressor Clutch Relay Control
64
0.5 OG/WH
3223
HO2S Heater Low Control - Bank 2 Sensor 2
65
0.5 GY/WH
3122
HO2S Heater Low Control - Bank 2 Sensor 1
66-67
--
--
Not Used
68
0.5 BN/WH
419
MIL Control
69
0.5 PU
1670
HO2S High Signal - Bank 2 Sensor 2
70
--
--
Not Used
71
0.5 PU/WH
821
VSS High Signal
72
0.5 L-GN/BK
822
VSS Low Signal
73
3 BK/WH
451
Ground
second connector......................................... .................................................
Description: 80-Way F MX123 Series, Sealed (GY)
Engine Control Module (ECM) X2 Pin
Wire
Circuit
Function
1
--
--
Not Used
2
0.5 PU/WH
6270
5-Volt Reference 2
3
0.5 GY
2701
5-Volt Reference 2
4
--
--
Not Used
5
0.5 BN
582
TAC Motor Control - 2
6
0.5 YE
581
TAC Motor Control - 1
7
--
--
Not Used
8
0.8 D-GN/WH
428
EVAP Canister Purge Solenoid Control
9-11
--
--
Not Used
12
0.5 GY/WH
3113
HO2S Heater Low Control - Bank 1 Sensor 1
13
0.5 L-GN
3212
HO2S Heater Low Control - Bank 2 Sensor 1
14-15
--
--
Not Used
16
0.5 PU
5284
Camshaft Actuator Solenoid Control
17
0.75 D-BU
878
Fuel Injector 8 Control
18
0.75 WH/BK
845
Fuel Injector 5 Control
19
0.75 YE/BK
846
Fuel Injector 6 Control
20
0.75 TN
1744
Fuel Injector 1 Control
21
0.5 YE
410
ECT Sensor Signal
22
0.5 TN
2761
Low Reference
23-25
--
--
Not Used
26
0.8 D-BU
496
Knock Sensor 1 Signal
27
0.8 GY
1716
Knock Sensor 1 Signal
28
--
--
Not Used
29
0.8 L-BU
1876
Knock Sensor 2 Signal
30
0.8 GY
2303
Knock Sensor 2 Signal
31
--
--
Not Used
32
0.5 GY
23
Generator Field Duty Cycle Signal
33
--
--
Not Used
34
0.5 BK
2755
Low Reference
35
0.5 TN
2752
Low Reference
36
--
--
Not Used
37
0.5 L-GN
1745
Fuel Injector 2 Control
38
0.5 RD/BK
1746
Fuel Injector 3 Control
39
0.75 D-BU/RD
844
Fuel Injector 4 Control
40
0.75 BK/OG
877
Fuel Injector 7 Control
41
0.5 GY
2705
5-Volt Reference 1
42
--
--
Not Used
43
0.5 GY
2704
5-Volt Reference 1
44
0.5 D-BU
6259
5-Volt Reference 1
45-49
--
--
Not Used
50
0.5 TN/WH
331
Oil Pressure Sensor Signal
51
--
--
Not Used
52
0.5 TN
2199
Low Reference
53
0.5 OG/BK
469
Low Reference
54-55
--
--
Not Used
56
0.5 TN
1664
HO2S Low Signal - Bank 1 Sensor 1
57
0.5 PU/WH
1665
HO2S High Signal - Bank 1 Sensor 1
58
0.5 L-GN
432
MAP Sensor Signal
59
0.5 PU
1666
HO2S High Signal - Bank 2 Sensor 1
60
0.5 TN
1667
HO2S Low Signal - Bank 2 Sensor 1
61
0.5 BN
25
Charge Indicator Control/Charge Indicator Signal
62
--
--
Not Used
63
0.5 PU
486
TP Sensor 2 Signal
64
0.5 D-BU/WH
6265
CMP Sensor Signal
65
0.5 D-GN
485
TP Sensor 1 Signal
66
0.5 BN
6266
Low Reference
67
--
--
Not Used
68
0.5 WH/BK
6271
CKP Sensor Signal
69
0.5 GY/BK
6272
Low Reference
70
0.5 PU
2121
IC 1 Control
71
0.5 PU/WH
2128
IC 8 Control
72
0.5 OG
2127
IC 7 Control
73
0.5 OG/WH
2122
IC 2 Control
74
0.5 L-BU/WH
2126
IC 6 Control
75
0.5 D-GN
2125
IC 5 Control
76
0.5 D-GN/WH
2124
IC 4 Control
77
0.5 L-BU
2123
IC 3 Control
78
0.5 BN
2129
Low Reference
79
0.5 BN/WH
2130
Low Reference
80
--
--
Not Used