Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

VERIFY THE DTC IS ACTIVE
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.
  CAUTION:
  Make sure braking capability is available before road testing.
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.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Perform ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
CHECK FOR IMPROPER TIRE PRESSURE/MISMATCHED TIRES
1. Turn the ignition off.
2. Check and adjust all tire pressures.
3. Inspect for mismatched tires on vehicle.
  Are the tires improperly inflated or is their mismatched tires on vehicle?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 3
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).
  Are any of the Wheel Speed Sensors speed showing 0 km/h (0 mph) or not matching other wheels or showing erratic behavior?
  
  Yes
  - Go To 4
  No
  - Perform ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
CHECK WHEEL SPEED SENSORS FOR DAMAGE
1. Inspect the wheel speed sensors for damaged or excessive air gap clearance.
  NOTE:
  Refer to the appropriate service information, if necessary, for procedures or specifications.
  
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 5
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
1. Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
2. Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  CAUTION:
  Make sure braking capability is available before road testing.
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 meet.
4. With the scan tool, read ABS DTCs.
  Does the remain active at this DTC?
  
  Yes
  - Replace the Wheel Speed Sensors in accordance with the Service Information. Refer to SENSOR, WHEEL SPEED, FRONT, REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Test complete.