GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 Body and Accessories 🢒 Entertainment 🢒 Diagnostic System Check - Instrument Cluster

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. 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.

    2.

  2. The Symptom List will determine the correct diagnostic procedure to use.

    3.

  3. The presence of DTCs which begin with "U" here indicate that one of door modules is not communicating

    4.

  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.

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 following control modules:
    3. • The Instrument Panel Cluster Module (IPC)
    • The Head Up Display Module (if equipped) (HUD)
    • The Drivers Door Module (DDM)

Does the scan tool communicate with the control modules listed above?

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 following control modules:

    • The Instrument Panel Cluster Module (IPC)
    • The Head Up Display Module (if equipped) (HUD)
    • The Drivers Door Module (DDM)

Does the scan tool display any DTCs for the control modules listed above?

Go to Step 4

Go to Symptoms

4

Does the scan tool display DTC U1161, U1162, or U1163?

Go to DTC U1161 Loss of PDM Serial Data , DTC U1162 Loss of LRDM Serial Data , DTC U1163 Loss of RRDM Serial Data in Doors

Go to Step 5

5

Does the scan tool display any other DTCs which begin with a "U"?

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Go to Step 6

6

Does the scan tool display DTC B1004 or B1007?

Go to Diagnostic Trouble Code (DTC) List/Type in Body Control System

Go to Step 7

7

Does the scan tool display DTC B1327, B1328, B1513, or B1514?

Go to Diagnostic Trouble Code (DTC) List/Type in Engine Electrical

Go to Diagnostic Trouble Code (DTC) List/Type