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Home >> Chrysler >> 2005 >> Pacifica Limited >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures - Diagnostic Information And Procedures - HVAC, Ignition Power Accessory, Instrument Cluster, Interior Lighting, Navigation, Overhead Console >> Heating & A/C >> Symptom: *REAR BOOSTER FAN REAR CONTROL SWITCH ON INDICATOR INOPERATIVE - ATC >> Diagnostic Procedure

Diagnostic Procedure

REAR BOOSTER FAN REAR CONTROL SWITCH ON INDICATOR INOPERATIVE - ATC SYMPTOM CHART

TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Rear Booster Fan Rear Control Switch harness connector.
Turn the ignition on.
Press the REAR fan mode switch on.
Measure the voltage of the Rear Fan On Indicator Driver circuit.
Is the voltage between 7 and 9 volts?
Yes --> Replace the Rear Booster Fan Rear Control Switch in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 2		 All
2 Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Rear Booster Fan Rear Control Switch harness connector.
Measure the resistance between ground and the Rear Fan On Indicator Driver circuit.
Is the resistance below 10K ohms?
Yes --> Repair the Rear Fan On Indicator Driver circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Go To 3		 All
3 Turn the ignition off.
Disconnect the ATC C2 harness connector.
Disconnect the Rear Booster Fan Rear Control Switch harness connector.
Measure the resistance of the Rear Fan On Indicator Driver circuit between the ATC C2 harness connector and the Rear Booster Fan Rear Control Switch harness connector.
Is the resistance below 5.0 ohms?
Yes --> Replace the Automatic Temperature Control (ATC) in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Repair the Rear Fan On Indicator Driver circuit for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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