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Home >> Jeep >> 2005 >> Wrangler X, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 489 (Chassis Diagnostic Procedures - Anti-Lock Brake System) >> Diagnostic Information And Procedures >> Brakes (25E) - Symptoms >> Symptom List: LEFT FRONT WHEEL SPEED SENSOR SIGNAL; REAR WHEEL SPEED SENSOR SIGNAL; RIGHT FRONT WHEEL SPEED SENSOR SIGNAL >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - REAR WHEEL SPEED SENSOR SIGNAL

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII®, read DTCs.
With the DRBIII®, read and record Freeze Frame information.
NOTE: The ABM must sense ALL 4 wheels at 25 km/h (15 mph) before it will extinguish the ABS indicators.

Does the DRBIII® display WHEEL SPEED SENSOR SIGNAL and WHEEL SPEED SENSOR CIRCUIT?
Yes --> Refer to the affected WHEEL SPEED SENSOR CIRCUIT  for the related symptom(s).
Perform ABS VERIFICATION TEST - VER 1 .
No --> Go To 2		 All
2 Turn the ignition on.
With the DRBIII® in Sensors, monitor ALL the Wheel Speed Sensor Signals while an assistant drives the vehicle.
Slowly accelerate as straight as possible from a stop to 24 km/h (15 mph).
Is the affected Wheel Speed Signal showing 0 km/h (0 mph)?
Yes --> Go To 3
No --> The condition is not present at this time. Monitor DRBIII® parameters while wiggling the related wiring harness. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness and connector terminals.
Perform ABS VERIFICATION TEST - VER 1 .		 All
3 Turn the ignition off.
Inspect the ABM connector, affected Wheel Speed Sensor, and affected Wheel Speed Sensor connector.
Is the Wheel Speed Sensor or any connector damaged?
Yes --> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1 .
No --> Go To 4		 All
4 Turn ignition off.
Inspect the affected Tone Wheel for damaged, missing teeth, cracks, or looseness.
NOTE: The Tone Wheel teeth should be perfectly square, not bent, or nicked.

Is the affected Tone Wheel damaged?
Yes --> Replace the Tone Wheel in accordance with the Service Information.
Perform ABS VERIFICATION TEST - VER 1 .
No --> Go To 5		 All
5 Turn the ignition off.
Using a Feeler Gauge, measure the affected Wheel Speed Sensor Air Gap.
NOTE: Refer to the appropriate service information , if necessary, for procedures or specifications.

Is the Air Gap within specifications?
Yes --> Go To 6
No --> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1 .		 All
6 Turn the ignition off.
Inspect the wheel bearings for excessive runout or clearance.
NOTE: Refer to the appropriate service information , if necessary, for procedures or specifications.

Is the wheel bearing clearance within specifications?
Yes --> Go To 7
No --> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1 .		 All
7 Turn the ignition off.
Visually inspect brakes for locking up due to lining contamination or overheating.
Inspect all components for defects which may cause a WHEEL SPEED SENSOR SIGNAL DTC to set.
Is any component damaged?
Yes --> Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1 .
No --> Refer to symptom WHEEL SPEED SENSOR CIRCUIT  for further diagnostics.
Perform ABS VERIFICATION TEST - VER 1 .		 All
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