Hummer H1 (2002+). Manual - part 271

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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

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®

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

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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

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®

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