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Home >> Chrysler >> 2007 >> Crossfire Base, 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Interior & Exterior - Electrical Diagnostics >> DTC Troubleshooting >> DTC 1115-04: Rear Window Defogger Switch Sense Circuit >> Diagnostic Test

Diagnostic Test

  1. 1) REAR DEFOGGER SWITCH SENSE SHORTED TO B(+) 
    Fig 1: Checking Rear Defogger Switch Sense Circuit For Short To Voltage
    GC0035021Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the BCM C3 harness connector.

    NOTE: Check connector - Clean/repair as necessary.

    Turn the ignition on.

    Measure the voltage of the Rear Defogger Switch Sense circuit at the BCM C3 harness connector.

    Is the voltage above 10.0 volts? 

    Yes 

    1. Go to  5).

    No 

    1. Go to  2).
  2. 2) BODY CONTROL MODULE 
    Fig 2: Checking Rear Defogger Switch Sense Circuit For Short To Voltage
    GC0035021Courtesy of CHRYSLER LLC

    With the ignition on.

    Measure the voltage of the Rear Defogger Switch Sense circuit at the BCM C3 harness connector.

    Press and hold the Rear Defogger Switch.

    Is the voltage above 10.0 volts? 

    Yes 

    1. Replace the Body Control Module. Refer to REMOVAL .
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Go to  3).
  3. 3) OPEN REAR DEFOGGER SWITCH SENSE CIRCUIT 
    Fig 3: Measuring Resistance Of Rear Defogger Switch Sense Circuit
    GC0035018Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the A/C Heater Control Module harness connector.

    NOTE: Check connector - Clean/repair as necessary.

    Measure the resistance of the Rear Defogger Switch Sense circuit from the BCM C3 harness connector to the A/C Heater Control Module harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go to  4).

    No 

    1. Repair the Rear Defogger Switch Sense circuit for an open.
    2. Perform BODY VERIFICATION TEST .
  4. 4) REAR DEFOGGER SWITCH SENSE CIRCUIT SHORT TO GROUND 
    Fig 4: Checking Rear Defogger Switch Sense Circuit For Short To Ground
    GC0035020Courtesy of CHRYSLER LLC

    With the ignition off.

    Measure the resistance between ground and the Rear Defogger Switch Sense circuit.

    Is the resistance below 100k ohms? 

    Yes 

    1. Repair the Rear Defogger Switch Sense circuit for a short to ground.
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Replace the A/C Heater Control Module. Refer to REMOVAL .
    2. Perform BODY VERIFICATION TEST .
  5. 5) REAR DEFOGGER SWITCH SENSE CIRCUIT SHORTED TO B(+) 
    Fig 5: Checking Rear Defogger Switch Sense Circuit For Short To B(+)
    GC0035019Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the A/C Heater Control Module harness connector.

    NOTE: Check connector - Clean/repair as necessary.

    Turn the ignition on.

    Measure the voltage of the Rear Defogger Switch Sense circuit at the A/C Heater Control Module harness connector.

    Is the voltage above 1.0 volt? 

    Yes 

    1. Repair the Rear Defogger Switch Sense circuit for a short to B(+).
    2. Perform BODY VERIFICATION TEST .

    No 

    1. Replace the A/C Heater Control Module. Refer to REMOVAL .
    2. Perform BODY VERIFICATION TEST .
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