SAAB WIS ONLINE

A/C OR SELF-DIAGNOSIS SYSTEMS DO NOT OPERATE

A/C OR SELF-DIAGNOSIS SYSTEMS DO NOT OPERATE

TROUBLE SYMPTOM:


• Switch LEDs are faulty and switches do not operate.

• Self-diagnosis system does not operate.


WIRING DIAGRAM:


CHECK FUSE.

Turn the ignition switch to OFF.

Remove the fuse No. 2 from main fuse box.

Check the condition of fuse.

Is the fuse blown-out?

Yes

Replace the fuse.


No


CHECK FUSE.

Turn the ignition switch to OFF.

Remove the fuses No. 9 and No. 17 from fuse & relay box.

Check the condition of fuse.

Is the fuse blown-out?

Yes

Replace the fuse.


No


CHECK AUTO A/C CONTROL MODULE POWER CIRCUIT.

Pull out the A/C control module connector.

Measure the voltage between auto A/C control module connector terminal and chassis ground when turning ignition switch to OFF.

Connector & terminal

(B283) No. 1 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

Repair the short circuit in harness for power supply line.


CHECK AUTO A/C CONTROL MODULE POWER CIRCUIT.

Measure the voltage between auto A/C control module connector terminal and chassis ground when turning the ignition switch to ACC.

Connector & terminal

(B283) No. 2 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

Repair the short circuit in harness for power supply line.


CHECK AUTO A/C CONTROL MODULE POWER CIRCUIT.

Measure the voltage between auto A/C control module connector terminal and chassis ground when turning the ignition switch to ON.

Connector & terminal

(B282) No. 8 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

Repair the short circuit in harness for power supply line.


CHECK AUTO A/C CONTROL MODULE GROUND CIRCUIT.

Measure the resistance of harness between auto A/C control module and chassis ground.

Connector & terminal

(B283) No. 12 — Chassis ground:

Is the resistance less than 5 Ω?

Yes


No

Repair the short circuit in harness for ground line.


CHECK POOR CONTACT IN AUTO A/C CONTROL MODULE CONNECTOR.

Check poor contact in auto A/C control module connector.

Is there poor contact in connector?

Yes

Repair the connector.


No

Replace the auto A/C control module.