GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Allure 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 ABS Indicator Always On

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) 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 OFF, or if the EBCM is sending an incorrect command 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 in Vehicle DTC Information

2

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

Did the ABS indicator turn OFF?

Go to Step 3

Go to Step 4

3

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

Is the replacement complete?

Go to Step 5

--

4

Replace the instrument panel cluster (IPC). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Is the replacement complete?

Go to Step 5

--

5

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2