SAAB WIS ONLINE

DTC 51 VALVE RELAY ON FAILURE

DTC 51 VALVE RELAY ON FAILURE

DIAGNOSIS:

Faulty valve relay

TROUBLE SYMPTOM:

ABS does not operate.

WIRING DIAGRAM:


CHECK VALVE RELAY IN ABSCM&H/U.

Disconnect the connector from ABSCM& H/U.

Measure the resistance between ABSCM&H/U terminals.

Terminals

No. 14 — No. 15:

Is the resistance more than 1 MΩ?

Yes


No

Replace the ABSCM&H/U.


CHECK POOR CONTACT IN CONNECTORS.

Is there poor contact in connectors 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.