GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The instrument panel cluster (IPC) turns the LOW TRAC Indicator on during the IPC bulb check for approximately 3 seconds when the ignition switch is turned to the ON position. The LOW TRAC Indicator is activated during a traction control event only. If the EBCM detects a low traction condition, the EBCM sends the IPC the command to turn the LOW TRAC indicator on.

Test Description

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

  1. Checks if the instrument panel cluster has the ability to turn the LOW TRAC indicator off or if the EBTCM is sending an incorrect command to turn the LOW TRAC indicator on.

Step

Action

Yes

No

Schematic Reference: Antilock Brake System Schematics

1

Was the ABS Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - ABS

2

Using a scan tool in the Instrument Panel Cluster Special Functions attempt to turn off the LOW TRAC indicator.

Did the LOW TRAC indicator turn off?

Go to Step 3

Go to Step 4

3

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

Is the replacement complete?

Go to Diagnostic System Check - ABS

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4

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

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