SAAB WIS ONLINE

INSPECTION

INSPECTION

Note

System for A/C equipped models only.


DETECTING CONDITION:


Condition (1):

• Engine coolant temperature is below 95°C (203°F).

• A/C switch is turned ON.

• Vehicle speed is below 19 km/h (12 MPH).



Condition (2):

• Engine coolant temperature is above 100°C (212°F).

• A/C switch is turned OFF.

• Vehicle speed is below 19 km/h (12 MPH).


TROUBLE SYMPTOM:

Radiator sub fan does not rotate under conditions (1) and (2) above.

CHECK POWER SUPPLY TO SUB FAN MOTOR.

Important

Be careful not to overheat the engine during repair.


Turn the ignition switch to OFF.

Disconnect the connector from sub fan motor and main fan motor.

Start the engine, and warm it up until engine coolant temperature increases over 100°C (212°F).

Stop the engine and turn ignition switch to ON.

Measure the voltage between sub fan motor connector and chassis ground.

Connector & terminal

(F16) No. 2 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No


CHECK GROUND CIRCUIT OF SUB FAN MOTOR.

Turn the ignition switch to OFF.

Measure the resistance between sub fan motor connector and chassis ground.

Connector & terminal

(F16) No. 1 — Chassis ground:

Is the resistance less than 5 Ω?

Yes


No

Repair the open circuit in harness between sub fan motor connector and chassis ground.


CHECK POOR CONTACT.

Check poor contact in sub fan motor connector.

Is there poor contact in sub fan motor connector?

Yes

Repair the poor contact in sub fan motor connector.


No


CHECK SUB FAN MOTOR.

Connect the battery positive (+) terminal to terminal No. 2, and ground (−) terminal to terminal No. 1 of sub fan motor connector.

Does the sub fan rotate?

Yes

Repair the poor contact in sub fan motor connector.


No

Replace the sub fan motor with a new one.


CHECK POWER SUPPLY TO SUB FAN RELAY.

Turn the ignition switch to OFF.

Remove the sub fan relay from A/C relay holder.

Measure the voltage between sub fan relay terminal and chassis ground.

Connector & terminal

(F27) No. 21 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No


CHECK POWER SUPPLY TO SUB FAN RELAY.

Turn the ignition switch to ON.

Measure the voltage between sub fan relay terminal and chassis ground.

Connector & terminal

(F27) No. 24 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No


CHECK 20 A FUSE.

Remove the 20 A fuse from A/C relay holder.

Check the condition of fuse.

Is the fuse blown out?

Yes

Replace the fuse.


No


CHECK POWER SUPPLY TO A/C RELAY HOLDER 20 A FUSE TERMINAL.

Measure the voltage of harness between A/C relay holder 20 A fuse terminal and chassis ground.

Connector & terminal

(F27) No. 3 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes

Repair the open circuit in harness between 20 A fuse and sub fan relay terminal.


No

Repair the open circuit in harness between main fuse box connector and 20 A fuse terminal.


CHECK FUSE.

Turn the ignition switch to OFF.

Remove the fuse No. 17 from joint box.

Check the condition of fuse.

Is the fuse blown out?

Yes

Replace the fuse.


No

Repair the open circuit in harness between sub fan relay and ignition switch.


CHECK SUB FAN RELAY.

Turn the ignition switch to OFF.

Measure the resistance of sub fan relay.

Terminals

No. 20 — No. 21:

Is the resistance more than 1 MΩ?

Yes


No

Replace the sub fan relay.


CHECK SUB FAN RELAY.

Connect the battery to terminals No. 22 and No. 24 of sub fan relay.

Measure the resistance of sub fan relay.

Terminals

No. 20 — No. 21:

Is the resistance less than 1 Ω?

Yes


No

Replace the sub fan relay.


CHECK HARNESS BETWEEN SUB FAN RELAY TERMINAL AND SUB FAN MOTOR CONNECTOR.

Measure the resistance of harness between sub fan motor connector and sub fan relay terminal.

Connector & terminal

(F16) No. 2 — (F27) No. 20:

Is the resistance less than 1 Ω?

Yes


No

Repair the open circuit in harness between sub fan motor and sub fan relay connector.


CHECK HARNESS BETWEEN SUB FAN RELAY AND ECM.

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance of harness between sub fan relay connector and ECM connector.

Connector & terminal

(F27) No. 22 — (B135) No. 34:

Is the resistance less than 1 Ω?

Yes


No

Repair the open circuit in harness between sub fan relay and ECM.


CHECK POOR CONTACT.

Check poor contact in connector between sub fan and ECM.

Is there poor contact in connector between sub fan motor and ECM?

Yes

Repair the poor contact connector.


No

Verify the DTC. Repair the trouble cause.