GM Service Manual Online
For 1990-2009 cars only

Object Number: 415860  Size: MF
Cell 44: Data Link Connector (DLC)
ABS Components
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons
Antilock Brake System Schematic Icons

Circuit Description

The Instrument Panel Cluster (IPC) turn the ABS Indicator on during the IPC bulb check for approximately 3 seconds when the ignition switch is turned to the ON position. If the EBTCM sets a Diagnostic Trouble Code (DTC) the EBTCM sends the IPC the command to turn the ABS Indicator on.

Test Description

The numbers below refer to step numbers on the diagnostic table.

  1. Checks if the IPC has the ability to turn the ABS Indicator on.

ABS Indicator Inoperative with No DTC Set

Step

Action

Value(s)

Yes

No

DEFINITION: The ABS Indicator does not come on during the IPC bulb check.

1

Was the Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - ABS

2

Using a scan tool in the Instrument Panel (IPC) Special Functions attempt to turn the ABS Lamp on.

Did the ABS Lamp turn on?

--

Go to Step 3

Go to Step 4

3

Replace the EBTCM. Refer to Electronic Brake Control Module Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - ABS

--

4

  1. Turn the ignition switch to the OFF position.
  2. Check the ABS indicator bulb. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.

Is the ABS Indicator bulb OK?

--

Go to Step 6

Go to Step 5

5

Replace the ABS Indicator bulb. Refer to Instrument Cluster Indicator Lamp Replacement in Instrument Panel, Gauges and Console.

Is the replacement complete?

--

Go to Diagnostic System Check - ABS

--

6

Replace the Instrument Panel Cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the replacement complete?

--

Go to Diagnostic System Check - ABS

--