Hummer H1 (2006+). Manual — part 162
OBD-492
On-Board Diagnostics
_____________________________________________
32 WAY TCM (GRAY) LOCATION: DRIVERSIDE ON TOP OF TCM
PIN
CKT
COLOR
DESCRIPTION
1
244
BK
Ground
2
243
PK
+12v Ignition input
3
1037
RD
+12v Battery input
4
243
PK
+12v Ignition input
5
244
BK
Ground
6
7
520
WH
TCC brake switch/cruise control release signal
8
9
784
DB
T-case range switch input to the ECM (-)
10
664
LG
Tow Haul switch request
11
12
666
YL
Over drive disable request
13
1012
PK
ABS activation signal (disables TCC during ABS activation)
14
15
16
17
18
19
665
DG
Tow haul switch light activation (ground)
20
667
PP
Over drive disable switch light activation (ground)
21
22
23
663
PK
Range limited circuit
24
662
WH
High trans temp signal
C78 Female
_____________________________________________
On-Board Diagnostics OBD-493
5745804
32 WAY TCM (RED) LOCATION: DRIVERSIDE ON TOP OF TCM
25
661
GN
Transmission control module MIL request signal
26
27
28
244
BK
Ground
29
211
YL
SAE J1939 CAN HI
30
914
PP
Class II (J1850 data link)
31
232
---
Shield
32
212
DG
SAE J1939 CAN LO
PIN
CKT
COLOR
DESCRIPTION
1
769
DB
Fluid pressure switch signal C
2
770
PK
Fluid pressure switch signal D
3
771
WH
Fluid pressure switch signal E
4
772
DG
Fluid pressure switch reverse signal
5
591
DB
Transmission range switch signal A
6
590
YL
Transmission range switch signal B
7
592
GY
Transmission range switch signal C
8
593
WH
Transmission range switch signal P
9
10
923
TN
TFT sensor signal
11
12
13
493
OR
Transmission turine speed switch signal
PIN
CKT
COLOR
DESCRIPTION
C79 Female
OBD-494
On-Board Diagnostics
_____________________________________________
14 WAY ENGINE POWER HARNESS LOCATION: ON TOP OF ENGINE
14
494
DB
Transmission turbine speed switch low reference
15
1000
WH
Vehicle speed sensor high
16
1001
LB
Transmission OSS Low
17
495
TN
AT ISS High signal
18
496
OR
AT ISS low signal
19
20
594
DG
Ground
21
272
YL
Trans ID
22
773
YL
PPC solenoid A valve high control
23
774
WH
PPC solenoid A valve low control
24
775
PK
PPC solenoid B valve high control
25
776
OR
PPC solenoid B valve low control
26
777
DG
Shift solenoid C valve control
27
778
DB
Shift solenoid D valve control
28
779
GY
Shift solenoid E valve control
29
780
WH
TCC PWM solenoid valve control
30
781
DB
Modulated main pressure
31
782
TN
+12 volt reference
32
783
DG
TCC PWM solenoid supply voltage
PIN
CKT
COLOR
DESCRIPTION
A
B
198
TN
A/C request
C
290
PK
Alternator field wire
D
251
BK
Ground circuit to MAF (ECM supplied)
PIN
CKT
COLOR
DESCRIPTION
C80 Female
A
G
H
P
_____________________________________________
On-Board Diagnostics OBD-495
5745804
24 WAY ENGINE CONNECTOR HARNESS LOCATION: ON TOP OF ENGINE
E
439
YL
A\C request
F
654
DB
MAF sensor
G
904
OR/BK
Alternator signal to instrument panel
H
348
BR
AC compressor signal
J
250
BK
Intake air temperature sensor
K
653
YL
Intake air temperature signal
L
794
RD
Low coolant lamp activation
M
239
PK
Engine ignition feed
N
34
LB
Starter solenoid signal
P
34
LB
Starter solenoid signal
PIN
CKT
COLOR
DESCRIPTION
A1
A2
A3
105
BR/WH
EGR valve position signal
A4
A5
A6
612
WH/BK
Baro pressure (5 volt signal)
A7
255
OR/BK
Baro sensor
A8
613
GY/BK
Baro sensor signal
B1
212
DG
SAE J1939 CAN LO
B2
B3
107
BK
EGR stepper motor
B4
362
DB
Turbocharger vane position control solenoid valve high
B5
363
WH
Turbocharger vane position control solenoid valve low
B6
367
GY
5v Ref for the turbo vein position sensor
B7
369
BR
VNT position sensor
B8
368
WH
VNT valve position
PIN
CKT
COLOR
DESCRIPTION
C81 Female
NOT ILLUSTRATED
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