Hummer H1 (2006+). Manual — part 160
OBD-484
On-Board Diagnostics
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D2
2
LG
Right turn indicator lamp activation
D3
961
PP
TT4 indicator lamp activation
E1
42
BR
Brake indicator lamp activation
E2
603
RD
ABS indicator lamp activation
E3
793
YL
Low washer fluid activation
E4
255
OR
High temp request to heated seat module
F1
17
PP
+ from dimmer module
F2
19
YL
Power supply to dimmer module
F3
658
BR
Check engine lamp activation
F4
327
YL
Drain Filter lamp activation
G1
517
OR
Power mirror switch battery feed
G2
210
DG
Transfer case lock lamp activation
G3
794
RD
Low coolant lamp activation
G4
879
WH/BK
Warning light activation
G5
714
DB
Check throttle lamp activation
H6
14
LB
Head lamp switch feed
H7
65
YL
Ignition feed to intermittent wiper switch
H8
61
RD
High speed windshield wiper signal
H9
12
OR
High Beam indicator lamp activation
J6
63
DG
Low speed windshield wiper signal
J7
27
OR
Intermittent wiper signal
J8
948
DG/YL
Left hand power mirror up/down signal
J9
947
DB/YL
Left hand power mirror left/right signal
K6
942
OR/BK
Left hand power mirror common +/–
K7
3
LB
Left turn indicator lamp activation
K8
944
OR
Right hand power mirror common +/–
K9
644
YL
Tachometer signal
L6
904
OR/BK
Malfunction indicator Lamp (MIL)
L7
620
TN
Oil pressure reference signal
L8
952
DB
Right hand power mirror left/right signal
M6
789
BR
Fuel selector valve control
M7
786
RD
Fuel selector valve control
M8
785
GY
Fuel selector switch feed +12v fuse 3B (Interior fuse box)
M9
953
DG
Right hand power mirror up/down signal
N6
59
BK
Ground
N7
30
GY
Ignition feed to gauges
N8
941
TN
Windshield wiper washer pump activation
N9
945
BR
Intermittent wiper relay activation
P6
55
OR
Rear cargo lamp activation
P7
29
PK
Fuel gauge signal
P8
625
BR
Coolant temperature signal
PIN
CKT
COLOR
DESCRIPTION
_____________________________________________
On-Board Diagnostics OBD-485
5745804
20 WAY TRANSMISSION PASS-THROUGH location: transmission, left
P9
353
YL
Speedometer signal
P10
878
LG/BK
Front ELocker time out light signal
PIN
CKT
COLOR
DESCRIPTION
A
777
DG
Shift solenoid C valve control
B
778
DB
Shift solenoid D valve control
C
782
TN
+12 volt reference
D
769
DB
Fluid pressure switch signal C
E
771
WH
Fluid pressure switch signal E
F
770
PK
Fluid pressure switch signal D
G
923
TN
TFT sensor signal
H
594
DG
Ground
J
780
WH
TCC PWM solenoid valve control
K
772
DG
Fluid pressure switch reverse signal
L
773
YL
PPC solenoid A valve high control
M
774
WH
PPC solenoid A valve low control
N
775
PK
PPC solenoid B valve high control
P
776
OR
PPC solenoid B valve low control
R
781
DB
Modulated main pressure
S
783
DG
TCC PWM solenoid supply voltage
T
272
YL
Trans ID
U
V
W
779
GY
Shift solenoid E valve control
PIN
CKT
COLOR
DESCRIPTION
C34 FEMALE
C34 MALE
OBD-486
On-Board Diagnostics
_____________________________________________
56 WAY ECM J1 (BLUE) LOCATION: DRIVERSIDE UNDER ECM
PIN
CKT
COLOR
DESCRIPTION
1
211
YL
SAE J1939 CAN HI
2
212
DG
SAE J1939 CAN LO
3
620
TN
Oil pressure reference signal
4
270
GN
Transmission temperature signal
5
1037
RD
+12 Battery voltage
6
625
BR
Coolant temperature signal
7
255
OR/BK
Baro sensor ground
8
156
PK/BK
Cam sensor ground
9
244
BK
Ground
10
242
PK
Ignition 1 Voltage
11
12
13
654
DB
MAF sensor signal
14
105
BR/WH
EGR valve position signal
15
914
PP
Class II (J1850 data link)
16
17
720
TN
5 volt reference
18
243
PK
+12v Ignition feed ECM
19
242
PK
Ignition 1 voltage
20
1037
RD
Battery positive voltage
21
22
23
367
GY
5 volt reference turbo vein position sensor
24
25
26
338
DB
Wait to start indicator control
C75 Female
_____________________________________________
On-Board Diagnostics OBD-487
5745804
27
28
721
LB
APP sensor 2 (5 volt signal)
29
30
31
612
WH/BK
Baro pressure (5 volt signal)
32
717
TN
APP sensor 1 (5 volt signal)
33
508
TN
Fuel rail pressure sensor (5 volt signal)
34
617
GY
Engine oil pressure (5 volt signal)
35
36
723
YL
APP sensor 3 (5 volt signal)
37
513
YL
Fuel pressure regulator solenoid control
38
39
614
GY
MAP sensor (5 volt signal)
40
510
PP/WH
Fuel pressure regulator solenoid control
41
42
514
PK
Generator field duty cycle signal
43
44
45
46
353
YL
Front differential
47
106
GY
EGR valve (5 volt signal)
48
49
50
254
RD
CAM sensor (5 volt signal)
51
511
YL
Fuel pressure regulator solenoid control
52
516
GY/BK
FICM relay control
53
136
BK
54
512
PP/WH
Fuel pressure regulator solenoid supply voltage
55
56
514
PK
Ignition voltage +12v
PIN
CKT
COLOR
DESCRIPTION
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