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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 2400: Air Distribution 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 air distribution stepping motor 6-pin connector located on front of climate control unit. See Figure . Connect a Red/Green LED test light between stepping motor connector terminals No. 1 (Green wire) and No. 3 (Red wire). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. See Figure . If both LEDs illuminate, go to next step. If both LEDs do not illuminate, repair faulty circuit between stepping motor and ACC control module. See WIRING DIAGRAMS  . When repairs are complete, go to step  3 .
  2. Connect a Red/Green LED test light between stepping motor connector terminals No. 4 (Blue wire) and No. 6 (Black wire). Simultaneously press AUTO and OFF buttons on ACC control panel to activate ACC system calibration. If both LEDs illuminate, replace air distribution stepping motor. If LEDs do not illuminate, repair faulty circuit between stepping motor and ACC control module. When repairs are complete, 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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