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Home >> Chevrolet >> 2005 >> Venture Base, Van Cargo Extended >> 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 instrument cluster. A low voltage value in multiple modules indicates a concern in the charging system.
  3. 5:  This step verifies that the condition is still present.
DTC C1236

Step Action Value(s) Yes No
Schematic Reference: ABS Schematics 
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Install a scan tool.
  2. Start the engine.
  3. With a scan tool, observe the Switched Battery Voltage parameter in Antilock Brake System (ABS) data list.
Does the scan tool indicate the voltage is greater than the specified value?		 10.8 V Go to Diagnostic Aids Go to Step 3 
3  With a scan tool, observe the Ignition 1 parameter in the instrument panel cluster (IPC) data list.
Does the scan tool indicate the voltage is greater than the specified value?		 10.8 V Go to Step 4  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
4
  1. Turn OFF the ignition.
  2. Disconnect the electronic brake control module (EBCM) harness connector.
  3. Install the J 39700 100-Pin Breakout Box using the J 39700-99  Breakout Box Adaptor to the EBCM harness connector only. See Special Tools .
  4. Test the ground circuits of the EBCM including the EBCM ground for a high resistance or an open. Refer to Circuit Testing andWiring 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 Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
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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