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Home >> Pontiac >> 2004 >> GTO Standard >> Repair and Diagnosis >> Brakes >> Antilock Brake System And Traction Control System >> Diagnostic Information and Procedures >> Traction Control Indicator Inoperative >> Test Description

Test Description

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

  1. 2:  This step tests the operation of the Trac Off indicator lamp circuit.
  2. 5:  This step tests the EBCM ABS off warning lamp circuit for an open or high resistance.
  3. 6:  This step tests the IPC ignition voltage circuit for an open, high resistance or short to ground.
  4. 7:  This step tests the EBCM ground circuits.
Traction Control Indicator Inoperative

Step Action Value(s) Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference:  ABS Connector End Views  
1 Did you perform A Diagnostic System Check - ABS? - Go to Step 2  Go to Diagnostic System Check - ABS 
2 
  1. Using a scan tool in the instrument Panel Cluster Special Function.
  2. Go to Instrument Panel in Output Control.
  3. Command the TCS OFF indicator ON and OFF.
Does the TCS OFF indicator turn ON and OFF when commanded?		 - Go to Step 9  Go to Step 3 
3 Tun ON the ignition and observe the Multi Function Display.
Does the Multi Function Display indicate "System OK"?		 - Go to Diagnostic Aids Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Disconnect the instrument panel cluster (IPC) harness connector.
  3. Measure the voltage between the ignition voltage circuits of the IPC and ground. Refer to Circuit Testing in Wiring Systems.
Does the voltage measure as specified?		 Battery Voltage Go to Step 5  Go to Step 6 
5  Test the EBCM ABS OFF warning lamp circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 7 
6  Test the IPC ignition voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 8 
7  Test the electronic brake control module (EBCM) ground circuits for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
8 Locate and repair the open, high resistance or short to ground in the ignition control relay circuits. Refer to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 11  -
9 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the replacement?		 - Go to Step 11  -
10 Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement in Instrument Panel, Gages and Console.
Did you complete the replacement?		 - Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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