ABS

Fig. 16 Code B1376: Wheel Sensor Front Right, Signal Faulty Or No Signal (Part 1 Of 2):

Fig. 16 Code B1376: Wheel Sensor Front Right, Signal Faulty Or No Signal (Part 2 Of 2):

Fault symptom
ABS warning lamp on, no ABS function.

Condition
Fault registered as open-circuit with a speed of 40 km/h..

Diagnostic help
The front right wheel sensor can be read by ISAT.
- Select "READ FUNCTIONS"
- Select "WHEEL SPEEDS"

The current wheel speed in km/h is displayed.
- If the front assembly of the vehicle is lifted the ISAT should display approx. 5 km/h if the right front wheel is rotated by hand at approx. 1 turn per second.

Diagnostic procedure
1 Diagnostic Trouble Code inspection
- Connect the ISAT Scan Tool.
- Start and test drive the car at an even speed. Read WHEEL SPEEDS in accordance with diagnostic help. Compare the four wheel speeds shown.

Does the front right wheel speed have a faulty rating?
YES - Continue with point 2.
NO - Continue with point 4.

2 Mechanical size inspection.
- Check that:
- wheel size and tire pressure are correct.
- there is no wheel bearing play.
- the toothed wheel is not damaged.

Is the inspection OK?
YES - Continue with point 3.
NO - Rectify the fault

3 Toothed wheel air gap inspection
- Check that the air gap between the toothed wheel sensor is 0.6+/-0.3 mm.

Is the air gap correct?
YES - Continue with point 4.
NO - Rectify the fault

4 Final inspection
- Erase the diagnostic trouble code.
- Carry out the driving cycle, drive the car with various load and engine speeds for 5 minutes.
- Read the diagnostic trouble code.

Is the diagnostic trouble code stored?
YES - Continue With "Test procedure Prior To Replacing ECM"
NO - The diagnostic procedure performed is right or the fault is of intermittent character