Hummer H1 (2002+). Manual — part 271
_____________________________________________________
PCM/Tech 1 Scan Tool 17
®
05745159
PCM SCHEMATICS
FUSE 2D
20A
INTERIOR
FUEL PUMP
RELAY
EXTERIOR
FUSE BOX
C1-10
G2
POWERTRAIN
CONTROL
MODULE
FUEL PUMP
RELAY CONTROL
FUEL LIFT
PUMP SIGNAL
TO FUEL
SELECTOR SWITCH
M
G2
FUEL
LIFT
PUMP
B
A
57 BK
787 GY
787 GY
787 GY
C27-D5
57 BK
C27-D8
238 DG
537 OR
9-S12-051
18
PCM/Tech 1 Scan Tool
_____________________________________________________
®
FUSE 4D
15 AMP
INTERIOR
FUSE 6B
5 AMP
INTERIOR
HOT A
T
ALL
TIMES
HOT IN RUN
AND ST
ART
ST
OP
LAMP
SWITCH
TCC CRUISE
BRAKE SWITCH
AD
BC
TO
ST
OP
LAMPS
C1
31
40
10 OR
291 PK
22 RD
810 PP
ST
OP
LAMP
SIGNAL
TCC/ CRUISE
BRAKE SIGNAL
FUSE 2C
10 AMP
INTERIOR
HOT IN RUN
AND ST
ART
C1-1
30
85
87
86
A/C COMPRESSOR
ENABLE
RELA
Y
CONTROL
A/C
COMPRESSOR
CLUTCH
DIODE
C5-8
400 LG
A/C COMPRESSOR
CLUTCH RELA
Y
EXTERIOR
FUSE
BOX
G1
440 RD
59 BK
348 BR
C28-D5
HV
AC
CONTROL
MODULE
C6-J8
H
347 YL
A/C
REQUEST
SIGNAL
TEMPERA
T
URE
CUT
OUT
SWITCH
HV
AC
UNIT
C1-39
C4-2
198 TN
C4-5
438 OR
439 YL
C27-C2
A/C
REQUEST
SIGNAL
COMPRESSOR
HIGH
PRESSURE
CUT
OUT
SWITCH
AMBIENT
TEMP
CUT
OUT
SWITCH
LOW
PRESSURE
CUT
OUT
SWITCH
9-S12-054
_____________________________________________________
PCM/Tech 1 Scan Tool 19
®
05745159
FUSE 5C
10AMP
INTERIOR
FUSE 3A
10 AMP
EXTERIOR
ON/
OFF
SET
COAST
RESUME
ACCEL
HOT IN RUN
AND START
HOT IN RUN
AND START
A
29
42
37
C1
C29-A11
C29-B11
C27-D10
C28-D14
C28-C2
C27-D12
C27-D3
C27-D4
C27-D6
C29-B2
C29-B1
C27-C5
C29-A12
C5-D3
C5-A4
A
B
154 TN
151 GY
152 DB
153 LG
ON / OFF
SIGNAL
SET
COAST
SIGNAL
RESUME
ACCEL
SIGNAL
WASTEGATE
SOLENOID
CONTROL
5 VOLT
REFERENCE
APP 3
SIGNAL
GROUND
APP 1
SIGNAL
GROUND
GROUND
D
B
C
A
G
E
F
J
K
3
1
2
C1
22
20
14
15
60
32
53
17
44
720 TN
717 WH
723 YL
724 DG
725 GY
718 DB
719 BR
721 LB
722 PP
ACCELERATIOR
PEDAL POSITION
SENSOR
POWERTRAIN
CONTROL
MODULE
(PCM)
APP 2
SIGNAL
9-S12-055
B
C
D
295 BR
YL
GRN
RD
20
PCM/Tech 1 Scan Tool
_____________________________________________________
®
FUSE 3B
20AMP
EXTERIOR
FUSE BOX
DRAIN
FILTER
HOT IN RUN
AND START
WATER IN
FUEL LIGHT
LEFT HAND
STATUS CENTER
C9-D
C3-F4
C1-45
B
A
327 YL
C
C9-J
WATER IN
FUEL
SENSOR
FUEL
HEATER
291 PK
57 BK
G2
57 BK
C
A
9-S12-056
FUSE 4B
5AMP
INTERIOR
FUSE BOX
TO
IGNITION
SWITCH
C3-N7
30 GY
FUSE 3A
20AMP
EXTERIOR
FUSE BOX
HOT IN RUN
AND START
C5-A4
239 PK
ENGINE
SHUTOFF
SOLENOID
FUEL
SOLENOID
701 DB
A
A
A
B
C
D
F
E
A
B
FUEL
SOLENOID
DRIVER
IGN
FUEL
SOLENOID
HIGH
FUEL
SOLENOID
LOW
FUEL
SOLENOID
CONTROL
CLOSURE
SIGNAL
CLOSURE
GROUND
ESO
SOLENOID
CONTROL
FUEL INJECT
CONTROL
CLOSURE
SIGNAL
CLOSURE
GROUND
712 LG
713 RD
491 BK
POWER
CONTROL
MODULE
C28-C15
C28-D3
C28-C3
C27-C13
C29-A1
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