SAAB WIS ONLINE

DTC 52 MOTOR RELAY ON FAILURE

DTC 52 MOTOR RELAY ON FAILURE

DIAGNOSIS:


• Faulty motor

• Faulty motor relay

• Faulty harness connector


TROUBLE SYMPTOM:


• ABS does not operate.

• EBD does not operate.


WIRING DIAGRAM:


CHECK MOTOR RELAY IN ABSCM&H/U.

Disconnect the connector from ABSCM& H/U.

Measure the resistance between ABSCM&H/U terminals.

Terminals

No. 12 — No. 13:

Is the resistance more than 1 MΩ?

Yes


No

Replace the ABSCM&H/U.


CHECK MOTOR OPERATION.

Operate the sequence control.

Note

Use the diagnosis connector to operate sequence control.


Can motor revolution noise (buzz) be heard when carrying out the sequence control?

Yes


No

Replace the ABSCM&H/U.


CHECK POOR CONTACT IN CONNECTORS.

Turn the ignition switch to OFF.

Is there poor contact in connector between generator, battery and ABSCM&H/U?

Yes

Repair the connector.


No


CHECK ABSCM&H/U.

Connect all connectors.

Erase the memory.

Perform the inspection mode.

Read out the DTC.

Is the same DTC as in current diagnosis still being output?

Yes

Replace the ABSCM&H/U.


No


CHECK ANY OTHER DTC APPEARANCE.

Are other DTCs being output?

Yes

Proceed with the diagnosis corresponding to DTC.


No

• A temporary poor contact.

•
Note

Although the ABS warning light remains illuminating at this point, this is a normal condition. Vehicle must be driven at approx. 12 km/h (7.46 MPH) or faster to turn off ABS warning light. Make sure that the ABS warning light goes off after driving vehicle.