The Antilock Braking System (ABS) helps to prevent wheel lock during full braking. This ensures that the vehicle can still be steered and moved out of the way of unexpected obstacles. When the ABS system is engaged you may feel a strong juddering sensation through the brake pedal.
The Calibra ABS employs a wheel speed sensor, on each wheel, aligned to monitor a toothed cog wheel mounted on the wheel hub. The sensors detect the motion of the cog teeth as they pass under the sensor head. The number of teeth on the cog wheel is important as the system is calibrated to expect the correct number per wheel rotation. The sensor head distance from the tooth face is also important this should be no more than 5 mm.
The V6 Calibra Traction Control system is linked to the ABS. The values of the front wheel speed sensors are shared with the Traction Control ECU.
All V6 Calibras used the combined under bonnet Bosch 2EH system. However, A slightly modified version of the 2EH system was used on late V6's. This version used stronger, more reliable magnetic hydraulic valves inside the main ABS unit (Generation 5).
Paperclip Test for Fault Codes:
ALDL Diagnostic plug in engine
bay by alarm horn at the back
|1 - Short out pins A and K in the engine bay diagnostic socket|
|2 - start the engine|
|3 - observe the ABS warning light on the dashboard instrument cluster|
|4 - read ABS light flashes like Morse code to decipher the fault code|
V6 Calibra ABS Fault Code Table
|12||Initiation of diagnosis.||n/a|
|16||LH Front Solenoid||Check Relay & Connections|
|17||RH Front Solenoid||Check Relay & Connections|
|18||Rear Solenoids||Check Relay & Connections|
|19||Solenoids Relay Circuits||Check operation of relays|
|25||Faulty Sensor toothed Ring||Check condition of the teeth on crown wheel/toothed ring.|
|35||Pump Relay Circuits||n/a|
|37||Stop Lamp Switch||Check Pedal Switch and Lamp|
|39||LH Front Speed Sensor||Check Air Gap & Operation|
|41||LH Front Speed Sensor||Check Resistance & Connections|
|42||RH Front Speed Sensor||Check Air Gap & Operation|
|43||RH Front Speed Sensor||Check Resistance & Connections|
|44||LH Rear Speed Sensor||Check Air Gap & Operation|
|45||LH Rear Speed Sensor||Check Resistance & Connections|
|46||RH Rear Speed Sensor||Check Air Gap & Operation|
|47||RH Rear Speed Sensor||Check Resistance & Connections|
|48||System Voltage High/Low||Check Alternator & Battery|
|55||Faulty ABS ECU||Check connections and power|
Common ABS Faults
Wheel speed sensor faults
Calibra's with electronic speedos may experience
erratic speedo behaviour when there is a fault with the front wheel speed
If you need to replace an ABS wheel speed sensor then be very careful removing the sensor from the plastic bracket. The mounting bolt is prone to seize and the bracket can easily break when trying to undo the bolt.
|All Other ABS Faults||
# The operation of the ABS solenoid valves can be tested with a Vauxhall/Opel/GM Tech1 handheld scanner. The Tech1 allows you to initiate a test on each of the four solenoid valves and indicates a pass or fail.
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