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Home >> Chevrolet >> 2007 >> Optra LT, Automatic >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C0036 (North America) >> Test Description

Test Description

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

  1. 2:  This step begins an examination for a defective wheel speed sensor.
  2. 7:  This step tests the wiring for a short to voltage.
  3. 9:  This step tests the wiring for a short to ground.
  4. 11:  This step tests for an open or a high resistance in the wiring.
Step Action Values Yes No
Schematic Reference:  Antilock Brake System Schematics  
Connector End View Reference:  Antilock Brake System Connector End Views  
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2  Inspect the wheel speed sensor.
Are there any signs of physical damage?		 - Go to Step 4  Go to Step 3 
3
  1. Turn the ignition switch to LOCK.
  2. Disconnect the left front wheel speed sensor connector.
  3. Measure the resistance between the sensor terminals.
Does the resistance measure within the specified range at approximately 25°C (77°F)?		 1280-1920 Ω Go to Step 5  Go to Step 4 
4 Replace the wheel speed sensor.
Did you complete the replacement?		 - Go to Step 14  -
5 Measure the voltage output of between the wheel speed sensor terminals while rotating the wheel about 1 revolution every 2 seconds.
Is the output equal to the specified value?		 120 mV Go to Step 7  Go to Step 6 
6 Replace the speed sensor or the toothed wheel as required.
Did you complete the replacement?		 - Go to Step 14  -
7 
  1. Disconnect the harness from the electronic brake control module (EBCM).
  2. Connect a DVM between ground and 1 terminal of the wheel speed connector.
  3. Turn the ignition to ON.
  4. Repeat steps 1-3 for the other terminal of the wheel speed connector.
Is the voltage for either of the terminals greater than the specified value?		 1 V Go to Step 8  Go to Step 9 
8 Repair the short to voltage in the affected circuit.
Did you complete the repair?		 - Go to Step 14  -
9 
  1. Turn the ignition switch to LOCK.
  2. Measure the resistance to ground from terminal 9 at the harness EBCM connector.
  3. Measure the resistance to ground from terminal 8 at the harness EBCM connector.
Is the resistance at either circuit less than the specified value?		 ∞ Go to Step 10  Go to Step 11 
10 Repair the short to ground in the affected circuit.
Did you complete the repair?		 - Go to Step 14  -
11 
  1. Measure the resistance between terminal 9 of the EBCM connector and terminal 1 of the harness wheel speed sensor connector.
  2. Measure the resistance between terminal 8 of the EBCM connector and terminal 2 of the harness wheel speed sensor connector.
Is the resistance on either circuit greater than the specified value?		 5 Ω Go to Step 12  Go to Step 13 
12 Repair the open or high resistance in the affected circuit as required.
Did you complete the repair?		 - Go to Step 14  -
13 Replace the EBCM.
Did you complete the replacement?		 - Go to Step 14  -
14
  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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