ABS 5.4

Wheel Sensor Rear Right. Signal Incorrect

Fault symptoms
ABS warning light on. ABS not functioning.

Conditions
- Speed signal absent for more than 10 ms when road speed above 40 km/h.
- Speed signal faulty when road speed above 12 km/h.

Diagnostic help
- RR wheel speed sensor signal can be read using diagnostic tool.
- Select: "Read values".
- Select: " Wheel Speed Rear Right".

The current wheel speed in km/h is displayed.

- With the RR wheel off the ground, the diagnostic tool should show a reading of about 5 km/h when the RR wheel is rotated by hand at a speed of about one turn a second.

Diagnostic procedure
1. Checking Wheel Speed




^ Contact ABS





^ Drive the car at a steady speed





^ Read Value:
Wheel Speed Rear Right ABS

Is the value for the RR wheel speed correct?

YES
Go To Step 4

NO
Go To Step 2

2. Checking The Mechanical Quantities





^ Check that the tire pressure, wheel size and wheel bearing play are OK.

Is the function correct?

NO
Go To Step 3

YES
Go To Step 4

3. Rectify The Fault

When Repair is Complete
Go To Step 4

4. Final Check





^ Clear the diagnostic trouble codes in all systems.





^ Carry out a drive cycle
Drive the car at varying engine loads and engine rpm for five minutes.

^ Evaluate the drive cycle:





^ Check that the diagnostic trouble code has not recurred

Is the function correct?

YES
Go To Step 5

NO
Go To Step 6

5. Final Check
The steps taken to correct the fault were correct.
^ Diagnosis is complete.

6. Final Check
See Before changing a control module, refer to General Fault Diagnosis.
^ Diagnosis for this fault code is complete.