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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 1350: Cabin Temperature Sensor >> 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. 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  .
  2. Locate cabin temperature sensor in instrument panel below ACC panel and disconnect 4-pin connector. Connect a test light between battery voltage and cabin temperature sensor connector terminal No. 2 (Yellow/Brown wire on 2000 models; Brown/Yellow wire on 2001 models). See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, repair wire (Yellow/Brown on 2000 models; Brown/Yellow on 2001 models) between sensor and ACC control module 39-pin connector terminal No. 39. See Figure . When repairs are complete, go to step  5 .
  3. Turn ignition on. Using scan tool, contact ACC control module and read cabin temperature sensor value. If value is 4.7-5.0 volts, go to next step. If value is not 4.7-5.0 volts, repair open in Blue/Yellow wire between sensor 4-pin connector terminal No. 3 and ACC control module connector terminal No. 20. When repairs are complete, go to step  5 .
  4. Connect a fused jumper wire between sensor 4-pin connector terminals No. 2 (Yellow/Brown wire on 2000 models; Brown/Yellow wire on 2001 models) and No. 3 (Blue/Yellow wire). Using scan tool, contact ACC control module and read cabin temperature sensor value. If value is zero volts, replace cabin temperature sensor. If value is not zero volts, short in Blue/Yellow wire. When repairs are complete, go to next step.
  5. 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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