C1043-LEFT REAR TONE WHEEL PERFORMANCE
For a complete wiring diagram, refer to the Wiring Information.
-
When Monitored:
With the ignition on.
-
Set Condition:
When the Anti-Lock Brake Module detects periodic drops of a Wheel Speed Sensor (WSS) signal.
Possible Causes |
|---|
| DIRTY TONE WHEEL/SENSOR |
| IMPROPER LEFT REAR TIRE PRESSURE/MISMATCHED TIRES |
| AXLE SHAFT FASTENER HARDWARE |
| LEFT REAR TONE WHEEL/BEARING DAMAGE |
1. 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. | Record DTC and Freeze Frame information. |
| 4. | With the scan tool, erase DTCs. |
| 5. | Cycle the ignition switch off then on. |
Make sure braking capability is
available before road testing.
CAUTION:
| 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 met. |
| 7. | With the scan tool, read DTCs. |
Does the scan tool display: C1043-LEFT REAR TONE WHEEL PERFORMANCE?
Yes
- Go To 3
No
- Go To 2
2. CHECK WHEEL SPEED SENSOR SIGNALS
| 1. | Turn the ignition on. |
| 2. | With the scan tool, monitor and graph ALL the WSS speeds and compare graph while an assistant drives the vehicle. |
| NOTE: | If graph shows periodic dropouts pay close attention to the tone wheel. |
| 3. | Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph). |
Is the Left Rear WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?
Yes
- Go To 3
No
- Perform ABS VERIFICATION TEST, (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
3. CHECK FOR IMPROPER LEFT REAR TIRE PRESSURE/MISMATCHED TIRES
| 1. | Turn the ignition off. |
| 2. | Check and adjust the Left Rear Tire pressure. |
| 3. | Check and adjust all other tire pressures. |
| 4. | Inspect for mismatched tires on vehicle. |
Is the Left Rear Tire improperly inflated or mismatched tires on vehicle?
Yes
- Repair as necessary.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Go To 4
4. CHECK AXLE SHAFT FASTENER HARDWARE FOR LOOSENESS
| 1. | Inspect the axle shaft fastener for looseness, and not properly fastened. Tighten fastener to proper specification as required. |
Was the Axle Shaft fastener loose?
Yes
No
- Go To 5
5. CHECK THE LEFT REAR TONE WHEEL/BEARING 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/Bearing 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. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Replace the Left Rear Tone Wheel/Bearing in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).