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Home >> Pontiac >> 2004 >> GTO Standard >> Repair and Diagnosis >> Brakes >> Antilock Brake System And Traction Control System >> Diagnostic Information and Procedures >> DTC 63 >> Test Description

Test Description

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

  1. 5:  This step tests the EBCM ground circuits.
  2. 6:  This step tests the EBCM battery positive voltage circuits.
  3. 7:  This step tests the EBCM ignition positive voltage circuit.
DTC 63

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. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Using the scan tool, cycle the one of the solenoids in the Special Functions menu.
Does the solenoid valve function properly?		 - Go to Diagnostic Aids Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the electronic brake control module (EBCM) harness connector.
  3. Measure the voltage between the battery positive voltage circuits of the EBCM and ground. Refer to Circuit Testing in Wiring Systems.
Does the voltage for both circuits measure as specified?		 Approximately 12 V Go to Step 4  Go to Step 6 
4
  1. Turn ON the ignition.
  2. Measure the voltage between the ignition positive voltage circuit of the EBCM and ground. Refer to Circuit Testing in Wiring Systems.
Does the voltage measure as specified?		 Approximately 12 V Go to Step 5  Go to Step 7 
5  Test the 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 10  Go to Step 8 
6  Test the battery positive voltage circuits 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 10  Go to Step 8 
7  Test the ignition positive voltage circuits 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 10  Go to Step 8 
8 Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 10  Go to Step 9 
9 Replace the Brake Pressure Modulator Valve (BPMV). Refer to Brake Pressure Modulator Valve (BPMV) Replacement .
Did you complete the replacement?		 - Go to Step 10  -
10
  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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