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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Communication - Non-DTC Based Diagnostics >> Diagnosis And Testing >> No Response From CCN (Cluster) >> Diagnostic Test

Diagnostic Test

  1. TEST FOR INTERMITTENT CONDITION 
    1. Turn the ignition on.
      NOTE:

      Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

    2. With the scan tool, select ECU View.
      NOTE:

      A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.

      Does the scan tool display a red "X" next to the module?

      Yes 

      • Go To  2

      No 

      • The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  2. (A418) (A412) FUSED B(+) CIRCUIT OPEN OR SHORTED 
    Fig 1: Checking Each Fused B (+) Circuit Using 12-Volt Test Light Connected To Ground
    GC0102339Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Cluster C1, C2 and C3 harness connectors.
    3. Using a 12-volt test light connected to ground, check each (A418) and (A412) Fused B(+) circuit.

      Does the test light illuminate brightly for each circuit?

      Yes 

      • Go To  3

      No 

      • Repair the Fused B(+) circuit for an open or short.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. (Z914) GROUND CIRCUIT OPEN 
    Fig 2: Checking Each Ground Circuit Using 12-Volt Test Light Connected To 12 Volts
    GC0102340Courtesy of CHRYSLER GROUP, LLC
    1. Using a 12-volt test light connected to 12-volts, check each (Z914) ground circuit.

      Does the test light illuminate brightly for each circuit?

      Yes 

      • Go To  4

      No 

      • Repair the (Z914) ground circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (F943) FUSED RUN/START RELAY OUTPUT CIRCUIT OPEN OR SHORTED 
    Fig 3: Checking Fused Run/Start Relay Output Circuit Using 12-Volt Test Light Connected To Ground
    GC0102341Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (F943) Fused Run/Start Relay Output circuit.

      Does the test light illuminate brightly?

      Yes 

      • Go To  5

      No 

      • Repair the (F943) Fused Run/Start Relay Output circuit for an open or short.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. (D265) OR (D264) CAN C INTERIOR BUS (125K) CIRCUIT OPEN 
    Fig 4: Measuring Resistance Of CAN C Interior Bus (-/+) Circuits
    GC0102342Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance of the (D264) CAN C Interior Bus (-) (125K) circuit between the TIPM C7 harness connector and the Cluster C2 harness connector.
    2. Measure the resistance of the (D265) CAN C Interior Bus (+) (125K) circuit between the TIPM C7 harness connector and the Cluster C2 harness connector.

      Is resistance below 5.0 ohms on both circuits?

      Yes 

      • Replace the Cluster in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .

      No 

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