Hummer H2. Manual — part 1934

HVAC Control Module Terminal Identification - C1

Connector Part Information

z

12129489

z

3-Way F Metri-Pack 280 Series Flexlock (BK)

Pin

Wire Color

Circuit No.

Function

A

BK

1050

Ground

B

PU/WH

760

Blower Motor Speed Control

C

RD

542

Battery Positive Voltage

Connector Part Information

z

12110206

z

24-Way F Micro-Pack 100 Series (L-BU)

Pin

Wire Color

Circuit No.

Function

A1

D-GN

1614

Recirculation Door Control

A2

D-BU

1646

Right Air Temperature Door Position Signal

2004 Hummer H2

2004 HVAC HVAC Systems - Automatic - Hummer H2

HVAC Control Module Terminal Identification - C2

A3

L-BU

733

Left Air Temperature Door Position Signal

A4

-

-

Not Used

A5

L-GN

2275

Mode Door Position Signal

A6

-

-

Not Used

A7

BN/WH

230

Instrument Panel Lamps Dimming Control

A8

BK/WH

1851

Ground

A9-A11

-

-

Not Used

A12

D-BU

204

A/C Low Pressure Sensor Signal

B1

WH/BK

1236

Right Air Temperature Door Control

B2

D-BU

1199

Left Air Temperature Door Control

B3

-

-

Not Used

B4

TN

2273

Mode Door Control

B5

BN

341

Ignition 3 Voltage

B6

YE

1791

Low Reference

B7

OG

4340

Battery Positive Voltage

B8

L-BU/BK

1688

5-Volt Reference

B9

BK

1050

Ground

B10

-

-

Not Used

B11

WH

1038

HVAC Class 2 Serial Data

B12

-

-

Not Used

Connector Part Information

z

15336594

z

12-Way F Micro Pack 100 (GY)

Pin

Wire Color

Circuit No.

Function

A

D-GN

734

Inside Air Temperature Sensor Signal

B

L-GN/BK

735

Ambient Air Temperature Sensor Signal

2004 Hummer H2

2004 HVAC HVAC Systems - Automatic - Hummer H2

Mode Actuator Terminal Identification

Recirculation Actuator Terminal Identification

C

WH

2338

Upper Left Air Temperature Sensor Signal

D

GY

2336

Upper Right Air Temperature Sensor Signal

E

WH/BK

2339

Lower Left Air Temperature Sensor Signal

F

GY/BK

2337

Lower Right Air Temperature Sensor Signal

G

PU

1838

Recirculation Door Position Signal

H-J

-

-

Not Used

K

BN

718

Low Reference

L

WH/BK

5515

Inside Air Temperature Sensor Assembly Control

M

PU/WH

760

Blower Motor Speed Control

Connector Part Information

z

12064993

z

6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

TN

2273

Mode Door Control

7

YE

1791

Low Reference

8

-

-

Not Used

9

L-GN

2275

Mode Door Position Signal

10

L-BU/BK

1688

5-Volt Reference

2004 Hummer H2

2004 HVAC HVAC Systems - Automatic - Hummer H2

DIAGNOSTIC INFORMATION AND PROCEDURES

DIAGNOSTIC SYSTEM CHECK - HVAC SYSTEMS - AUTOMATIC

Test Description

The numbers below refer to the step numbers on the diagnostic table.

3: Lack of communication may be due to a malfunction of the class 2 serial data circuit. The specified
procedure will determine the particular condition.

5: Determine if the HVAC control module, body control module, or powertrain control module have set
DTCs which may affect HVAC operation are present.

6: The presence of DTCs which begin with "U" indicate some other module is not communicating.

7: Answer Yes if the first three characters of the DTC name begins with B10; regardless of the last two
characters.

Diagnostic System Check - HVAC Systems - Automatic

Connector Part Information

z

12064993

z

6-Way F Micro-Pack 100 Series (BK)

Pin

Wire Color

Circuit No.

Function

5

BN

341

Ignition 3 Voltage

6

D-GN

1614

Recirculation Door Control

7

YE

1791

Low Reference

8

-

-

Not Used

9

PU

1838

Recirculation Door Position Signal

10

L-BU/BK

1688

5-Volt Reference

Step

Action

Yes

No

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2004 Hummer H2

2004 HVAC HVAC Systems - Automatic - Hummer H2