SAAB WIS ONLINE

INSPECTION

INSPECTION

DIAGNOSIS:

The AT OIL TEMP warning light circuit is open or shorted.

TROUBLE SYMPTOM:


• When the ignition switch is turned to ON (engine OFF), AT OIL TEMP warning light does not illuminate normally.


WIRING DIAGRAM:


CHECK FUSE (No. 13).

Remove the fuse (No. 13).

Is the fuse (No. 13) blown out?

Yes

Replace the fuse (No. 13). If replaced fuse (No. 13) is blown out easily, repair short circuit in harness between fuse (No. 13) and combination meter.


No


CHECK HARNESS CONNECTOR BETWEEN COMBINATION METER AND IGNITION SWITCH.

Turn the ignition switch to OFF.

Remove the combination meter.

Turn the ignition switch to ON (engine OFF).

Measure the voltage between combination meter connector and chassis ground.

Connector & terminal

(i11) No. 7 (+) — Chassis ground (−):

Is the voltage more than 9 V?

Yes


No

Repair the open circuit in harness between combination meter and battery.


CHECK OPEN CIRCUIT OF HARNESS.

Turn the ignition switch to OFF.

Disconnect the connector from TCU.

Measure the resistance of TCU connector between combination meter connector.

Connector & terminal

(B56) No. 13 — (i10) No. 5:

Is the resistance less than 1 Ω?

Yes


No

Repair the open circuit in harness between TCM and combination meter, and poor contact in coupling connector.


CHECK COMBINATION METER.

Measure the resistance between combination meter connector and chassis ground.

Connector & terminal

(i10) No. 5 (+) — Chassis ground (−):

Is the resistance less than 1 MΩ?

Yes


No

Repair the ground short circuit in harness between TCM and combination meter.


CHECK INPUT SIGNAL FOR TCM.

Connect the connector to combination meter.

Turn the ignition switch to ON (engine OFF).

Measure the voltage between TCM connector and chassis ground.

Connector & terminal

(B56) No. 13 (+) — Chassis ground (−):

Is the voltage less than 9 V?

Yes

Replace the TCM.


No

Replace the combination meter.