GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The instrument panel cluster (IPC) turns the antilock brake system (ABS) indicator ON during the IPC bulb check for approximately 3 seconds when the ignition switch is turned to the ON position. If the electronic brake control module (EBCM) sets a DTC, the EBCM sends the IPC the command to turn the ABS indicator ON.

Test Description

The number below refers to step number on the diagnostic table.

  1. This step checks if the IPC has the ability to turn the ABS Indicator ON.

Step

Action

Yes

No

Schematic Reference: Antilock Brake System Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

Using a scan tool in the Instrument Panel (IPC) Special Functions, attempt to turn the antilock brake system (ABS) indicator ON.

Did the ABS indicator turn ON?

Go to Step 3

Go to Step 4

3

Replace the electronic brake control module (EBCM). Refer to Control Module References for replacement, setup, and programming.

Is the replacement complete?

Go to Step 7

--

4

  1. Turn the ignition switch to the OFF position.
  2. Check the IPC connections. Refer to Instrument Cluster Replacement .

Is the instrument cluster connectors OK?

Go to Step 6

Go to Step 5

5

Repair the instrument clusters connectors. Refer to Repairing Connector Terminals .

Is the repair complete?

Go to Step 7

--

6

Replace the IPC. Refer to Control Module References for replacement, setup, and programming.

Is the replacement complete?

Go to Step 7

--

7

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2