GM Service Manual Online
For 1990-2009 cars only

Object Number: 595778  Size: LF
ABS Components
Instrument Cluster Indicators, Traction Control System, and Serial Data

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.

Low Traction Indicator Always On

Step

Action

Value(s)

Yes

No

DEFINITION: The LOW TRAC indicator does not turn off after the instrument panel cluster (IPC) bulb check and there is not a low traction condition.

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 and Traction Control Module Replacement .

Is the replacement complete?

--

Go to Diagnostic System Check - ABS

--

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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