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Home >> Buick >> 2004 >> Century Base >> Repair and Diagnosis >> Brakes >> Antilock Brake System And Traction Control System >> Diagnostic Information and Procedures >> DTC C1236 >> Test Description

Test Description

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

  1. 2:  Use the scan tool in order to inspect the voltage to the EBCM.
  2. 3:  Use the scan tool in order to inspect the voltage to the body control module. A low voltage value in multiple modules indicates a concern in the charging system.
  3. 5:  Verifies that the condition is still present.
DTC C1236

Step Action Value(s) Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference:  ABS Connector End Views  
1 Did you perform the ABS Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - ABS 
2 
  1. Install a scan tool.
  2. Start the engine.
  3. With a scan tool, observe the Switched Battery Voltage parameter in ABS data list.
Does the scan tool indicate the voltage is greater than the specified value?		 10.5 V Go to Diagnostic Aids Go to Step 3 
3  With a scan tool, observe the Battery Voltage parameter in the Body Control Module data list.
Does the scan tool indicate the voltage is greater than the specified value?		 10.5 V Go to Step 4  Go to Diagnostic System Check - Engine Electrical in Engine Electrical
4
  1. Turn OFF the ignition.
    2. IMPORTANT: Removing battery voltage or ground from the EBCM will result in the following conditions:
    • Loss of the TIM learned tire inflation configuration parameters in the EBCM
    • The EBCM sets DTC C1245

    When the diagnosis is complete, inspect the tire pressures and perform the TIM reset. Refer to Tire Pressure Monitor Reset Procedure in Tire Pressure Monitoring.
  2. Disconnect the EBCM harness connector.
  3. Install the universal pinout box using the cable adaptor to the EBCM harness connector only.
  4. Test the ground circuits of the EBCM including the EBCM ground for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 7  Go to Step 5 
5 
  1. Reconnect the EBCM harness connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 6  Go to Diagnostic Aids
6 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the repair?		 - Go to Step 7  -
7
  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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