Hummer H2. Manual — part 415
DIAGNOSTIC INFORMATION AND PROCEDURES
DIAGNOSTIC STARTING POINT - NAVIGATION SYSTEM
Begin the system diagnosis with the Diagnostic System Check - Navigation System . The Diagnostic System
Check will provide the following information:
z
The identification of the control module(s) which command the system
z
The ability of the control module(s) 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 - NAVIGATION SYSTEM
Test Description
The numbers below refer to the step numbers on the diagnostic table.
Connector Part Information
z
12064799
z
12-Way F Micro-Pack 100 Series (BLK)
Pin
Wire Color
Circuit No.
Function
A-D
-
-
Not Used
E
D-GN/WH
817
Vehicle Speed Signal
F-K
-
-
Not Used
L
OG/BK
2061
Navigation Mono Audio Signal (-)
M
PK/BK
2062
Navigation Mono Audio Signal (+)
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2
2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a
total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular
condition.
3: Checks for DTCs for each module of the system.
4: The presence of DTCs which begin with "U" indicate some other module is not communicating. The
specified procedure will compile all the available information before tests are performed.
Diagnostic System Check - Navigation System
SCAN TOOL DATA LIST
Radio
Step
Action
Yes
No
Schematic Reference: Navigation System Schematics
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
navigation radio.
Does the scan tool communicate
with the control modules?
Go to Step 3
Go to Scan Tool Does Not
Communicate with Class 2 Device
in Data Link Communications
3
Select the display DTCs function
on the scan tool for the navigation
radio.
Does the scan tool display any
DTCs?
Go to Step 4
Go to Symptoms - Navigation
Systems
4
Does the scan tool display any
DTCs which begin with a "U"?
Go to Step 5
Go to Step 6
5
Does the scan tool display U2153?
Go to Diagnostic
Trouble Code (DTC)
List
Go to Scan Tool Does Not
Communicate with Class 2 Device
in Data Link Communications
6
Does the scan tool display DTC
B1000, B1004, B1007, or B1009?
Go to Diagnostic
Trouble Code (DTC)
List in Body Control
System
Go to Step 7
7
Does the scan tool display DTC
B1327 or B1328?
Go to Diagnostic
Trouble Code (DTC)
List in Engine Electrical
Go to Diagnostic Trouble Code
(DTC) List
Scan Tool Parameter
Data List
Units Displayed
Typical Data Value
Ignition ON/Engine OFF/Radio ON
8-Digit GM Part Number
ID Information
Numeric
Varies
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2
SCAN TOOL DATA DEFINITIONS
8-Digit GM Part Number
The scan tool displays an 8 digit numeric number. The part number of the module.
Calibration ID
The scan tool displays 0-9999. The number designating what calibrations the module contains.
Julian Date of Build
The scan tool displays 0-999. The day of the year that the module was built.
New VIN Counter
The scan tool displays 0-99. The number of times a new VIN number has been set in the radio.
PROM ID
The scan tool displays 0-9999. The identification number of the modules internal PROM.
Signal Strength
The scan tool displays the strength of the received signal in dB.
Year Module Built
The scan tool displays a 1990- 2020, the production year the module was manufactured.
DIAGNOSTIC TROUBLE CODE (DTC) LIST
Diagnostic Trouble Code (DTC) List
DTC B0004
Calibration ID
ID Information
Numeric
Varies
Julian Date of Build
ID Information
Numeric
Varies
New VIN Counter
Data Display
Numeric
0
PROM ID
ID Information
Numeric
Varies
Signal Strength
Data Display
dB
51 dB
Year Module Built
ID Information
Numeric
Varies
DTC
Diagnostic Procedure
Modules
B0004
DTC B0004
Navigation Radio
B2462
DTC B2462
Navigation Radio
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2
Circuit Description
The navigation radio receives the vehicle speed signal from the PCM through a dedicated circuit shared with the
instrument cluster.
Conditions for Running the DTC
z
The navigation radio must detect a power mode transition to ON.
z
The radio does not set this DTC if B1327 or B1328 is current.
z
The vehicle must drive for 4 km (2.5 mi) after receiving a GPS signal.
Conditions for Setting the DTC
The navigation radio compares the vehicle speed signal from the PCM to the GPS location signal every second.
If the GPS signal indicates that the vehicle has traveled 4 km (2.5 mi) but no vehicle speed signal was received,
the radio sets the DTC.
Action Taken When the DTC Sets
The navigation radio uses the GPS signal when the vehicle speed signal from the PCM is unavailable.
The following symptoms may happen if the vehicle speed signal from the PCM is unavailable:
z
The vehicle icon may jump to different positions on the map screen.
z
The vehicle icon, current position marker may not move on the map screen while the vehicle is being
driven.
z
The route guidance accuracy may be degraded.
Conditions for Clearing the DTC
z
A current DTC clears when the navigation radio detects the vehicle speed signal from the PCM for more
than one second.
z
A history DTC clears after 50 ignition cycles without a vehicle speed signal failure.
Diagnostic Aids
An intermittent condition may be caused by the following:
z
Mis-routed harness
z
Rubbed through wire insulation
z
Broken wire inside the insulation
z
A loose connector pin
Test Description
2004 Hummer H2
2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст