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Diagnostic Test

  1. TEST FOR INTERMITTENT CONDITION 
    NOTE:

    Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

    1. Turn the ignition on.
      NOTE:

      Make sure the battery voltage is between 10.0 and 16.0 volts.

    2. With the scan tool, read the module status.
      NOTE:

      Check the TIPM for any active CAN hardware DTCs, perform DTC before proceeding.

      Does the scan tool indicate that the module is active on the bus?

      Yes 

      • The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.

      No 

      • Go To  2
  2. CHECK THE (A977) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT 
    Fig 1: Checking Fused B (+) Circuit For An Open Or Short
    GC0149120Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the A/C Heater Control C1 harness connector.
    3. Using a 12-volt test light connected to ground, check the (A977) Fused B(+) circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  3

      No 

      • Repair the open or short in the (A977) Fused B(+) circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. CHECK THE (Z916) GROUND CIRCUIT FOR AN OPEN 
    Fig 2: Checking Ground Circuit For An Open
    GC0149125Courtesy of CHRYSLER GROUP, LLC
    1. Using a 12-volt test light connected to 12-volts, check the (Z916) Ground circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  4

      No 

      • Repair the open in the (Z916) Ground circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. CHECK THE (F921) FUSED RUN RELAY OUTPUT CIRCUIT FOR AN OPEN OR SHORT 
    Fig 3: Checking Fused Run Relay Output Circuit For An Open Or Short
    GC0149126Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (F921) Fused Run Relay Output circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  5

      No 

      • Repair the open or short in the (F921) Fused Run Relay Output circuit.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. CHECK THE (D265) AND (D264) CAN INTERIOR BUS (125K) CIRCUITS FOR AN OPEN 
    Fig 4: Checking Can Interior Bus (125K) Circuits For An Open
    GC0149128Courtesy of CHRYSLER GROUP, LLC
    1. Disconnect the TIPM C7 harness connector.
    2. Measure the resistance of the (D264) CAN Interior Bus (-) (125K) circuit between the TIPM C7 harness connector and the A/C Heater Control Module C1 harness connector.
    3. Measure the resistance of the (D265) CAN Interior Bus (+) (125K) circuit between the TIPM C7 harness connector and the A/C Heater Control Module C1 harness connector.

      Are the resistances below 5.0 Ohms?

      Yes 

      • Replace the A/C Heater Control Module in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

      • Repair the open in the (D265) or (D264) CAN Interior Bus (125K) circuit. Inspect the connector for damage.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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