Diagnostic Test

CHECK FOR A DTC C1043-LEFT REAR TONE WHEEL PERFORMANCE
NOTE: This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read DTCs.
3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
4. With the scan tool, erase DTCs.
5. Cycle the ignition switch off then on.
  CAUTION: Ensure brake capability is available before road testing.
6. Test drive the vehicle in a straight line to 40 km/h (25 mph).
  NOTE: Vehicle must be driven above 40 km/h (25 mph) for set conditions to be meet.
7. With the scan tool, read DTCs.
  Does the scan tool display: C1043-LEFT REAR TONE WHEEL PERFORMANCE?
  
  Yes
  - Go to step 2
  No
  - Perform the ABS-INTERMITTENT CONDITION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
CHECK THE LEFT REAR TONE WHEEL FOR DAMAGE
NOTE: Check the tone wheel teeth for missing teeth, cracks, or looseness. Teeth should be perfectly square, not bent, or nicked.
1. Check the Left Rear Tone Wheel for damage.
2. Check the Left Rear Tone Wheel for dirt.
  Was the tone wheel dirty?
  
  Yes
  - Clean tone wheel and sensor. Clear codes and retest.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Replace the Left Rear Tone Wheel in accordance with the Service Information.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .