C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE
C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE
For a complete wiring diagram, refer to the Wiring Information.
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When Monitored:
With the ignition on.
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Set Condition:
When the Right Front Wheel Speed Sensor (WSS) reading is different from the readings received from the other sensors at a vehicle speed above 40 km/h (25 mph). The Anti-Lock Brake Module compares WSS readings from side-to-side on an axle and front-to-rear.
Possible Causes |
|---|
| RIGHT FRONT WSS LOOSE - B6, B7 CIRCUITS/CONNECTOR/TERMINAL DAMAGE |
| IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES |
| RIGHT FRONT TONE WHEEL/BEARING DAMAGE |
| RIGHT FRONT WSS |
| ANTI-LOCK BRAKE MODULE |
1. CHECK FOR DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE 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, record and erase DTCs. |
Make sure brake capability is
available before road testing.
CAUTION:
| 3. | Road test the vehicle over 40 km/h (25 mph). |
| NOTE: | Vehicle must be driven above 40 km/h (25 mph) for set conditions to be met. |
| 4. | With the scan tool, read DTCs. |
Does the scan tool display: C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE active?
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 Right Front WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?
Yes
- Go To 3
No
- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform ABS INTERMITTENT CONDITION diagnostic procedure, (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
3. CHECK FOR IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES
| 1. | Turn the ignition off. |
| 2. | Check and adjust the Right Front Tire pressure. |
| 3. | Check and adjust all other tire pressures. |
| 4. | Inspect for mismatched tires on vehicle. |
Is the Right Front 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 RIGHT FRONT WSS LOOSENESS, INSPECT B6, B7 CIRCUITS/TERMINALS FOR DAMAGE
| NOTE: | Check all terminals for broken, bent, pushed out, or corroded terminals |
| 1. | Inspect the Anti-Lock Brake Module harness connector, Right Front WSS, and Right Front WSS harness connector |
| 2. | Inspect the Right Front WSS for looseness, excessive corrosion and not properly fastened. |
| 3. | Inspect the (B6) Right Front WSS Signal and (B7) Right Front WSS Supply circuits between the Right Front WSS and Anti-Lock Brake Module for damage. |
Is the Right Front WSS loose or any of the wiring/connectors/terminals damaged?
Yes
- Repair as necessary.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Go To 5
5. CHECK RIGHT FRONT WHEEL SPEED SENSOR FOR DAMAGE
| 1. | Remove the Right Front Wheel Speed Sensor |
| 2. | Inspect the Right Front Wheel Speed Sensor face for damage. |
Is the Right Front Wheel Speed Sensor damaged?
Yes
- Replace sensor and hub assembly.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Go To 6
6. CHECK RIGHT FRONT TONE WHEEL/BEARING FOR DAMAGE
| 1. | Inspect the Right Front Tone Wheel/Bearing for damage, missing teeth, cracks, corrosion or looseness. |
| NOTE: | The Tone Wheel teeth should be perfectly square, not bent, or nicked. |
Is the Right Front Tone Wheel/Bearing damaged?
Yes
- Repair as necessary.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No
- Go To 7
7. RIGHT FRONT WHEEL SPEED SENSOR
| 1. | Replace the Right Front Wheel Speed Sensor in accordance with the Service Information. |
| 2. | Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure) |
| 3. | Road test the vehicle over 40 km/h (25 mph). |
| NOTE: | Vehicle must be driven above 40 km/h (25 mph) for set conditions to be met. |
| 4. | With the scan tool, read ABS DTCs. |
Did DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE reset?
Yes
- Replace the Anti-Lock Brakes Module in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure).
No