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Home >> Saab >> 2003 >> 9-3 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Automatic A/C-Heater Systems) >> Diagnostic Tests >> DTC B2945: Sensor Ground >> Diagnostic Procedure

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.
  1. Turn ignition off. Disconnect ACC control module 39-pin connector. Turn ignition on. Connect a test light between harness side 39-pin connector terminals No. 1 (Black wire) and No. 36 (Yellow/Green wire). See Figure . See WIRING DIAGRAMS  . If test light does not illuminate, go to next step. If test light illuminates, repair short to battery voltage in Yellow/Green wire between ACC control module and solar sensor. When repairs are completed, go to step  4 .
  2. Connect test light between ACC control module 39-pin connector terminals No. 1 (Black wire) and No. 38 (Blue/Red wire on 2000 models; Red/Blue wire on 2001 models). If test light does not illuminate, go to next step. If test light illuminates, repair short to battery voltage in Blue/Red wire between ACC control module and mixed-air temperature sensor. When repairs are completed, go to step  4 .
  3. Connect test light between ACC control module 39-pin connector terminals No. 1 (Black wire) and No. 39 (Yellow/Brown wire on 2000 models; Brown/Yellow wire on 2001 models). If test light does not illuminate, go to next step. If test light illuminates, repair short to battery voltage in wire (Yellow/Brown on 2000 models; Brown/Yellow on 2001 models) between ACC control module and cabin temperature sensor. When repairs are completed, go to next step.
  4. 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.
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