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Symptom: *REAR BOOSTER FAN INOPERATIVE - ATC POSSIBLE CAUSES AUTOMATIC TEMPERATURE CONTROL (ATC) DTC(S) PRESENT INTEGRATED POWER MODULE (IPM) DTC(S) PRESENT INTERMITTENT CONDITION FUSED REAR BOOSTER FAN RELAY OUTPUT CIRCUIT SHORTED TO GROUND REAR BOOSTER FAN REAR BOOSTER FAN POWER MODULE GROUND CIRCUIT OPEN REAR BOOSTER FAN CONTROL CIRCUIT SHORTED TO VOLTAGE REAR BOOSTER FAN CONTROL CIRCUIT OPEN REAR BOOSTER FAN POWER MODULE AUTOMATIC TEMPERATURE CONTROL (ATC) REAR BOOSTER FAN REAR BOOSTER FAN POWER MODULE INTEGRATED POWER MODULE (IPM) - OPEN CIRCUIT INTEGRATED POWER MODULE (IPM) - OPEN CIRCUIT REAR BOOSTER FAN RELAY INTEGRATED POWER MODULE (IPM) - OPEN CIRCUIT FUSED REAR BOOSTER FAN RELAY OUTPUT CIRCUIT OPEN TEST ACTION APPLICABILITY 1 Turn the ignition on. 9REAR9 should display on the ATC display panel. The word 9AUTO9 should not be displayed. Turn the Rear Booster Fan Rear Control switch to AUTO for 30 seconds, then slowly t, read the active ATC DTCs. Does the DRBIII t display any DTCs? All Yes → Return to the Heating & A/C symptom list and choose the symptom(s). No → Go To 2 653 HEATING & A/C |