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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 B2492: Mixed-Air Damper Stepping Motor >> 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. Disconnect mixed-air damper stepping motor 6-pin connector. See Figure . Turn ignition on. Connect a Red/Green LED test light between stepping motor harness connector terminals No. 1 (Red wire) and No. 3 (Green wire). See WIRING DIAGRAMS  . Press ACC control panel AUTO and OFF buttons to activate calibration function. If Red and Green LEDs illuminate, go to next step. If Red and/or Green LEDs do not illuminate, repair Green wire or Red wire. When repairs are completed, go to step  3 .
  2. Connect a Red/Green LED test light between stepping motor harness connector terminals No. 4 (Blue wire) and No. 6 (Black wire). Press ACC control panel AUTO and OFF buttons to activate calibration function. If Red and Green LEDs illuminate, replace mixed-air damper stepping motor. If Red and/or Green LEDs do not illuminate, repair Blue wire or Black wire. When repairs are completed, go to next step.
  3. 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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