C1377

Read the instructions below then start the fault diagnostic procedure.

Symptom: Warning lamps for ABS and brakes are on as also is the central warning lamp. TCS OFF warning lamp is on. No ABS or TCS function.

C1377

Fault symptoms

Warning lamps for ABS and brakes are on as also is the central warning lamp.

TCS OFF warning lamp is on.

No ABS or TCS function.

Conditions

DTC is set by open circuit.

Diagnostic help

•	A reading of the front right wheel speed sensor can be obtained with the diagnostic tool.

-	Select “Read values”.

-	Select “ Wheel Speed Front Right “.

Current wheel speed in km/h (mph) is displayed.

With the front of the car raised, the diagnostic tool should read approximately 5 km/h (3.1 mph) if the front right wheel is rotated by hand at about 1 rev./second.

•	For tracing electrical faults, the diagnostic tool can be used to take readings from the control module's wheel-sensor inputs.

-	Select: “Read values”

-	Select: “Wheel-sensor output”

The reading is used to determine whether the control module has lost contact with any of the wheel sensors. If there is contact, the value should be approximately 3.4 V DC.

Defective contact front right approximately 0.8 V DC.