Hummer H2. Manual — part 210
OnStar Button Assembly - Terminal Identification
Connector Part Information
z
12047662
z
2-Way F Metri-Pack 150 Series (BK)
Pin
Wire Color
Circuit No.
Function
A
BARE
514
Ground
B
GY
655
Cellular Microphone Signal
Connector Part Information
z
12047886
z
8-Way F Metri-Pack 150 Series (BK)
Pin
Wire Color
Circuit No.
Function
A
L-GN/BK
2515
Keypad Supply Voltage
B
D-GN/WH
2514
Keypad Signal
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2
Vehicle Communication Interface Module (VCIM) - Terminal Identification - C1
Vehicle Communication Interface Module (VCIM) - Terminal Identification - C2
C-D
-
-
Not Used
E
OG/BK
2518
Keypad Ground
F
YE/BK
2516
Keypad Green LED Signal
G
BN/WH
2517
Keypad Red LED Signal
H
-
-
Not Used
Connector Part Information
z
15383038
z
16-Way F 040II (WH)
Pin
Wire Color
Circuit No.
Function
1
-
-
Not Used
2
BN/WH
2517
Keypad Red LED Signal
3
YE/BK
2516
Keypad Green LED Signal
4
-
-
Not Used
5
OG/BK
2518
Keypad Ground
6
L-GN/BK
2515
Keypad Supply Voltage
7
BK/WH
1851
Ground
8
BK/WH
1851
Ground
9-10
-
-
Not Used
11
D-GN/WH
2514
Keypad Signal
12-14
-
-
Not Used
15
OG
3240
Battery Positive Voltage
16
OG
3240
Battery Positive Voltage
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC STARTING POINT - CELLULAR COMMUNICATION
Begin the system diagnosis with Diagnostic System Check - Cellular Communication . The Diagnostic
System Check will provide the following information:
z
The identification of the control modules which command the system
z
The ability of the control modules to communicate through the serial data circuit
z
The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and
where the procedure is located.
DIAGNOSTIC SYSTEM CHECK - CELLULAR COMMUNICATION
Connector Part Information
z
15383039
z
12-Way F 040II (WH)
Pin
Wire Color
Circuit No.
Function
1
PK/BK
2062
Cellular Telephone Voice Signal
2
OG/BK
2061
Cellular Telephone Low Reference
3-4
-
-
Not Used
5
YE
1127
Trip Computer/Nav Class 2 Serial Data
6-7
-
-
Not Used
8
BARE
1792
Drain Wire
9
GY
655
Cellular Microphone Signal
10
BARE
514
Ground
11-12
-
-
Not Used
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2: Lack of communication may be due to a partial malfunction or a total malfunction of the class 2 serial
data circuit. The specified procedure will determine the condition.
5: The presence of DTCs which begin with "U" indicate some other system control module is not
communicating.
Diagnostic System Check - Cellular Communication
Step
Action
Yes
No
1
Install a scan tool.
Does the scan tool power up?
Go to Step 2
Go to Scan Tool Does
Not Power Up in Data
Link Communications
2
1. Turn ON the ignition, with the engine OFF.
2. Attempt to establish communication with the
vehicle communication interface module
(VCIM).
Does the scan tool communicate with the VCIM?
Go to Step 3
Go to Scan Tool Does
Not Communicate with
Class 2 Device in Data
Link Communications
3
1. Access the class 2 Power Mode in the
Diagnostic Circuit Check on the scan tool.
2. Rotate the ignition switch through all
positions while observing the ignition switch
power mode parameter.
Does the ignition switch parameter reading match
the ignition switch position for all switch positions?
IMPORTANT:
The engine may start during the following step.
Turn OFF the engine as soon as you have
observed the Crank power mode.
Go to Step 4
Go to Power Mode
Mismatch in Body
Control System
4
Select the display DTCs function on the scan
tool.Does the scan tool display any DTCs?
IMPORTANT:
This vehicle will be equipped with one of 2
OnStar(R) systems, generation 5 or generation 6.
Id information, module information 2 screen on
the scan tool to determine which system the
vehicle is using. The coordinating diagnostic
procedures should be used.
Go to Step 5
Go to OnStar Symptom
Diagnosis
5
Does the scan tool display any DTCs which begin
with a "U"?
Go to Step 6
Go to Step 7
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2
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