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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Antilock Brake System With TCS) >> Diagnostic Information and Procedures >> Traction Off Indicator Always On >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  Checks if the scan tool can turn ON and OFF all the indicator lamps in the IPC.
  1. 4:  Checks if the circuits going to the IPC or the IPC is at fault.
Traction Off Indicator Always On

Step Action Yes No
Schematic Reference: Antilock Brake System Schematics 
Connector End View Reference: CELL LINK 
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle
2 
  1. Using a scan tool, select the instrument panel cluster (IPC) Special Functions mode.
  2. Go to Displays Test in Output Control.
  3. In the Displays Test mode you can turn ON or OFF the instrument panel indicators.

    All indicators will turn ON when commanded ON.

Does the TRAC OFF indicator turn ON then OFF?		 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 Diagnostic System Check - Vehicle -
4 
  1. Disconnect the IPC and connect a Test Light across the appropriate power and ground terminals.
  2. Test Light OFF, repair open in power or ground circuit to IPC.
  3. Test Light ON, check connector for poor connection to IPC.
  4. If OK, replace the IPC. Refer to Control Module References for replacement, setup, and programming.
Is the IPC replacement complete?		 Go to Diagnostic System Check - Vehicle -
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