Diagnostic Test

1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.

Did the DTC return?

Yes 

• Go To  2

No 

• Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .

1. Refer to the recorded DTCs.

   Are there any WSS circuit related DTCs active or pending?

   Yes 

   • Perform the applicable diagnostic procedure(s). Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .

   No 

   • Go To  3

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), not matching other wheels, or showing erratic behavior?

   Yes 

   • Go To  4

   No 

   • Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .

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 the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  5

1. Turn the ignition off.
2. Check the Right Front WSS for looseness/debris, excessive corrosion and not properly fastened.
3. Inspect the ABS Module harness connector and the Right Front WSS harness connector.
4. Inspect the (B6) Right Front WSS (-) and (B7) Right Front WSS (+) circuits between the Right Front WSS and ABS for damage.

   Was the Right Front WSS loose/debris or any of the wiring/connectors/terminals damaged?

   Yes 

   • Repair or replace as necessary.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  6

1. Inspect the Right Front Encoder/Wheel Bearing for debris.

   Was there debris on the Encoder/Wheel Bearing?

   Yes 

   • Clean the Encoder/Wheel Bearing.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  7

1. Check the Right Front Encoder/Wheel Bearing or Hub for excessive runout, clearance or damage.
   NOTE:

   Refer to the appropriate service information, if necessary, for procedures or specifications.

   Is the Right Front Encoder/Wheel Bearing or Hub Damaged?

   Yes 

   • Replace the Wheel Bearing/Hub in accordance with the Service Information.
   • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

   No 

   • Go To  8

1. Replace the Right Front Wheel Speed Sensor (WSS) in accordance with the Service Information. Refer to SENSOR, WHEEL SPEED, FRONT, REMOVAL AND INSTALLATION .
2. Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
   WARNING:

   To avoid personal injury or death, check brake capability is available before road testing.

3. Road test the vehicle over 40 km/h (25 mph).
   NOTE:

   Vehicle must be driven for several minutes above 40 km/h (25 mph) for set conditions to be meet.

4. With the scan tool, read ABS DTCs.

   Does the DTC remain active?

   Yes 

   • Go To  9

   No 

   • Test complete.

1. Turn the ignition off.
2. Disconnect the ABS harness connector.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
   • Proper connector installation.
   • Damaged connector locks.
   • Corrosion.
   • Other signs of water intrusion.
   • Weather seal damage (if equipped).
   • Bent terminals.
   • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
   • Terminals that have been pushed back into the connector cavity.
   • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

   Repair any conditions that are found.

6. Connect the ABS harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
   WARNING:

   To avoid possible serious or fatal injury, check brake capability is available before road testing.

10. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read ABS DTCs.

    Did the DTC return?

    Yes 

    • Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL AND INSTALLATION .
    • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

    No 

    • The wiring or poor connection problem has been repaired.
    • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .