C1381

C1381
Wheel Sensor Rear Left. Signal Incorrect

Fault symptoms
ABS warning lamp 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
^ Rear left wheel speed sensor can be read using the diagnostic tool.
- Select "Read Values".
- Select " Wheel Speed Rear Left".
The current wheel speed in km/h is displayed.
^ With the rear wheels of the car raised off the ground, the diagnostic tool should show a reading of about 5 km/h when the RL wheel is rotated by hand at a speed of about 1 turn a second.

Diagnostic procedure
1. Checking Wheel Speed





^ Contact ABS.

2. Checking Wheel Speed





^ Drive the car at a steady speed.





^ Read value: Wheel Speed Rear Left (ABS).

Is the value for the RL wheel speed correct?

NO
Go to step 3

YES
Go to step 5

3. Checking Mechanical Quantities





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

Is the function correct?

NO
Go to step 4

YES
Go to step 5

4. Checking Mechanical Quantities

Rectify the fault.
When repair is complete
Go to step 5

5. 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?

NO
Go to step 7

YES
Go to step 6

6. Final Check

The steps taken to rectify the fault were correct.
Diagnosis is complete

7. Final Check

Diagnosis for this fault code is complete.
Refer to "Before Changing A Control Module" at General.