449A-Rear Left Wheel Speed Sensor Circuit Performance: Testing

WARNING: This page is about a different car, the 2009 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC 449A-REAR LEFT WHEEL SPEED SENSOR CIRCUIT 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.
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: C449A-REAR LEFT WHEEL SPEED SENSOR CIRCUIT PERFORMANCE active?
  
  Yes
  - Go to step 3
  No
  - Go to step 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 Rear Left WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?
  
  Yes
  - Go to step 3
  No
  - Perform the ABS-INTERMITTENT CONDITION diagnostic procedure. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
CHECK FOR IMPROPER REAR LEFT TIRE PRESSURE/MISMATCHED TIRES
1. Turn the ignition off.
2. Check and adjust the Rear Left Tire pressure.
3. Check and adjust all other tire pressures.
4. Inspect for mismatched tires on vehicle.
  Is the Rear Left Tire improperly inflated or mismatched tires on vehicle?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 4
CHECK REAR LEFT WSS LOOSENESS, INSPECT 23, 24 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, Rear Left WSS, and Rear Left WSS harness connector
2. Inspect the Rear Left WSS for looseness, excessive corrosion and not properly fastened.
3. Inspect the (23) Rear Left WSS (-) and (24) Rear Left WSS (+) circuits between the Rear Left WSS and Anti-Lock Brake Module for damage.
  Is the Rear Left WSS loose or any of the wiring/connectors/terminals damaged?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 5
CHECK REAR LEFT WHEEL SPEED SENSOR FOR DAMAGE
1. Remove the Rear Left Wheel Speed Sensor
2. Inspect the Rear Left Wheel Speed Sensor face for damage.
  Is the Rear Left Wheel Speed Sensor damaged?
  
  Yes
  - Replace sensor and hub assembly.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 6
CHECK REAR LEFT TONE WHEEL/BEARING FOR DAMAGE
1. Inspect the Rear Left 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 Rear Left Tone Wheel/Bearing damaged?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 7
CHECK REAR LEFT WHEEL BEARING FOR DAMAGE
1. Inspect the Rear Left wheel bearing for excessive runout or clearance.
  NOTE: Refer to the appropriate service information, if necessary, for procedures or specifications.
  
  Is the Rear Left Wheel Bearing Damaged?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure .
  No
  - Go to step 8
REAR LEFT WHEEL SPEED SENSOR
1. Replace the Rear Left Wheel Speed Sensor in accordance with the Service Information.
2. Perform ABS VERIFICATION TEST. See 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 449A-REAR LEFT WHEEL SPEED SENSOR CIRCUIT PERFORMANCE reset?
  
  Yes
  - Replace the Anti-Lock Brakes Module in accordance with the Service Information.
  - Perform ABS VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure
  No
  - Test Complete.