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Home › Chevrolet › 2004 › Optra Base, Standard › Repair and Diagnosis › Brakes › Traction Control › Anti-Lock Brake System › Diagnostic Information and Procedures › DTC C0080/C0085 › Test Description

Test Description

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

  1. 1:  This step begins the test of the inlet valve.
  2. 3:  This step tests the outlet valve.
Step Action Yes No
1 
  1. Raise and suitably support the vehicle at the corner being tested. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Turn the ignition switch to ON.
  3. Install the scan tool to the data link connector (DLC) and select WHEEL REAR LEFT to begin the solenoid tests at that wheel. This will test both the inlet and the outlet valves.
  4. When the scan tool indicates PRESSURE HOLD, depress and hold the brake pedal until the end of the test.
  5. Have an assistant attempt to rotate the wheel.
Can the wheel be rotated?		 Go to Step 2  Go to Step 6 
2
  1. Maintain pressure on the brake pedal.
  2. When the scan tool indicates PRESSURE INCREASE, have an assistant attempt to rotate the wheel again.
Can the wheel be rotated?		 Go to Step 6  Go to Step 3 
3 
  1. Maintain pressure on the brake pedal.
  2. When the scan tool indicates PRESSURE RELEASE ON, have an assistant attempt to rotate the wheel again.
Can the wheel be rotated?		 Go to Step 4  Go to Step 6 
4
  1. Release the brake pedal pressure when the scan tool indicates PRESSURE RELEASE OFF.
  2. Clear all DTCs.
  3. Road test the vehicle.
Does the DTC set?		 Go to Step 6  Go to Step 5 
5
  1. Inspect the wiring harness and connector terminals for an intermittent problem.
  2. Repair any problem found.
Did you find and correct the condition?		 System OK -
6 Replace the antilock brake system (ABS) unit.
Did you complete the replacement?		 System OK -
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