Diagnostic Procedure
WARNING: This page is about a different car, the 2001 Saab 9-3 and 2000 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition off. Connect scan tool to Data Link Connector (DLC) located under steering column. Using scan tool, contact ACC control module and check for DTC B2945. If DTC B2945 is not displayed, go to next step. If DTC B2945 is displayed, go to DTC B2945: SENSOR GROUND .
- Locate solar sensor under windshield, at center of dashboard. Disconnect solar sensor 4-pin connector. Connect a test light between battery voltage and harness side of sensor 4-pin connector terminal No. 4 (Yellow/Green wire). See Fig 1 . If test light comes on, go to next step. If test light does not come on, repair Yellow/Green wire between solar sensor and ACC control module 39-pin connector terminal No. 36. See Fig 2 . When repairs are complete, go to step 4 .
- Connect at 1.5-volt battery between harness side of sensor 4-pin connector terminal No. 3 (Brown/Red wire) and terminal No. 4 (Yellow/Green wire). Turn ignition on. Using scan tool, contact ACC control module and read solar sensor value. If value is approximately 1.5 volts, replace solar sensor. If value is not approximately 1.5 volts, repair Brown/Red wire between solar sensor and ACC control module 39-pin connector terminal No. 16. When repairs are complete, go to next step.
- Using scan tool, clear all DTCs from all systems. Recheck A/C system operation for original complaint. If A/C system is operating properly and no DTC has been detected, repair is complete. If a DTC has been detected, a control module may need to be replaced. See CONTROL MODULES under COMPONENT TESTS.