S70 L5-2.4L VIN 61 B5244S (2000)
Electrical Accessory Panel: Description and Operation
ABS wheel sensor wiring -Jan 1996 (natural gas powered engines)
Note: There are approximately 150 cars with factory-installed natural gas powered engines which have solenoid valves on the firewall. Solenoid
valves can interfere with signals from the ABS sensors. Deal with these cars as follows.
Customers have complained that the brake pedals in model year 1996 cars pulse, and that there is some noise when braking at low speeds. However,
no reduction in braking performance or other faults have been reported. If the above occurs, it is due to the ABS system carrying out a self-diagnosis
at low speed, which can be a result of high resistance in one of 4 cable splices in the front wheel sensor cable harness. The cables have a thin plastic
film on the inside of the insulation to make them more flexible, and there may be a residue of this plastic film in the cable splice crimp. The wiring has
been remedied in production from February 1996. The correct material, and cars that have been remedied, are marked with a green dot (decal or paint)
under the fusebox cover on the white edge of the integrated relay/fusebox. This Service Bulletin describes how to cut and re-splice suspect cable
splices. After re-splicing the ABS system should be tested accordingly.
Preparations:
Disconnect battery negative lead. Remove wiper arms. Remove cover from windscreen wiper well.
Remove electrical distribution unit cover (4 torx)
Cut tape on cable duct (at A).
Remove clip holding cable on brake pipe.
Remove cable harness from clip on wiper bracket.
Remove screws holding central electrical unit.
Lift the central electrical unit from its box and place on the edge of the windscreen wiper well.
