Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 155

44
Wheels, Tires, Alignment 928
Fault/Fault code Possible causes
Remedy/Remarks
- Signal improbable
- If the ABS is also deactivated, look for the fault in the area of
the speed sensor or in the fault path between ABS control unit
and speed sensor.
- If no fault found, repeat. If the fault is still apparent, try replacing
the ABS contrd unk.
- Fault not present: This could have occurred under certain envi-
ronmental conditions, e.g. driving in the vlclnity of powerful
transmitters. There Is no fault in the vehicle.
- Fault present: First try replacing the ABS control unit then the
tire pressure warning system control unk.
ABS speed sensor
rear right
Fault cc-de - 6 -
- proceed as for fault code - 5 - for all faults.
Connector assignment:
ABS control unit 55-pole PIN 10
ABS control unit 35.pole PIN 31
Tire pressure warning system control unit PIN 8
HF sender
front left
Fault code - 7 -
- proceed as for fault code - 5 - for all faults.
Connector assignment:
ABS control unit 55-pole PIN 16
ABS control unit 35. pole PIN 17
Tire pressure warning system control unit PIN 29
44 - 308 Tire pressure warning system (RDK) diagnosis
Printed in Germany - XXII. 1939