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Rover Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition15 · Brakes – ABS BY4
15 · Brakes

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Make
Rover
Model
600 Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition
Section
Operation › Original page
Brakes – ABS BY4Original page
MAIN CODE SUB CODE SYMPTOM/DIAGNOSIS PROBABLE CAUSE
4 1 Wheel sensor
Right – front		 Open circuit, internal short or short circuit to body earth in wheel sensor.
  1. Open or short circuit to body earth in positive (+) wire between wheel sensor and ABS control unit.
  2. Open or short circuit to body earth in negative (–) wire between wheel sensor and ABS control unit.
  3. Positive (+) wire shorted to negative wire between wheel sensor and ABS control unit.
  4. Loose connector or terminals making poor contact.
  5. Improper wheel sensor air gap.
  6. Faulty ABS control unit.
  7. Missing pulser.
  8. Modulator does not decrease pressure properly.

Symptom does not reappear:
Intermittent interruption in the wheel sensor
Wheel spin of both front wheels (DTC 4 – 8, no problem)
The transmission downshift excessively (DTC 4 – 1 and 4 – 2, no problem)
4 2 Left – front
4 4 Right – rear
4 8 Left – rear
ABS indicator light illuminates when wheel sensor signal is missing at speeds above 6 mph (10 km/h).
This diagnosis is not performed when parking brake switch is ON.
5 – Rear wheel lock
Right/left		 Open circuit, internal short or short to body earth in wheel sensor system.
5 4 Right 1. Rear brake drag.
2. Modulator does not decrease pressure properly.
3. Faulty ABS control unit.
Symptom does not reappear:
Intermittent interruption in wheel sensor.
Wheel spin caused by operating parking brake while parking brake switch is stuck OFF.
Car spun – out – (No problem).
5 8 Left
ABS indicator light illuminates when either or both rear wheels lock and wheel sensor signal is not detected during driving.
This diagnosis is not performed when parking brake switch is ON.
6 – Fail – safe relay:
Front/rear		 Short circuit to power in relay drive circuit between fail – safe relay and ABS control unit.
6 1 Front 1. Faulty relay drive transistor (ON) in ABS control unit.
2. Fail – safe relay stuck ON.
3. Short circuit to power in solenoid drive circuit between fail – safe relay and ABS control unit.
6 4 Rear
ABS indicator light illuminates when battery voltage is detected at solenoid terminal before fail – safe relays are turned on during initial diagnosis.

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