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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 472 ((Cabin Compartment Node (CCN) - Electrical Diagnostics)) >> DTC Troubleshooting >> U1149-Lost Communication With Multi-Function Switch >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) 
    NOTE:

    Before proceeding with this diagnostic procedure, verify the Left and Right Multifunction Switch and Clockspring harness connectors are properly seated and verify proper pin terminal tension. A loose connection at any of these connectors may cause this DTC to set.

    1. Turn the ignition on.
    2. With the scan tool, read DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go To  2

      No 

      • Test complete, the condition or conditions that originally set this DTC are 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.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. (D506) LIN BUS CIRCUIT OPEN 
    Fig 1: Checking LIN BUS Circuit For Open
    GC0124257Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Left Multifunction Switch C1 harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (D506) LIN BUS circuit.

      Is the voltage above 5 volts?

      Yes 

      • Go To  3

      No 

      • Repair the (D506) LIN BUS circuit for an open
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  3. (F202) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN 
    Fig 2: Checking Fused Ignition Switch Output (Run/Start) Circuit For An Open
    GC0124258Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage of the (F202) Fused Ignition Switch Output (RUN/START) circuit.

      Is the voltage above 10 volts?

      Yes 

      • Go To  4

      No 

      • Repair the (F202) Fused Ignition Switch Output (RUN/START) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (A411) FUSED B+ (I.O.D.) CIRCUIT OPEN 
    Fig 3: Checking Fused B+ (I.O.D.) Circuit For Open
    GC0124259Courtesy of CHRYSLER GROUP, LLC
    1. Measure the voltage of the (A411) Fused B+ (I.O.D.) circuit.

      Is the voltage above 10 volts?

      Yes 

      • Go To  5

      No 

      • Repair the (A411) Fused B+ (I.O.D.) circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. (Z910) GROUND CIRCUIT OPEN 
    Fig 4: Checking Ground Circuit For Open
    GC0124260Courtesy of CHRYSLER GROUP, LLC
    1. Measure the resistance between ground and the (Z910) Ground circuit.

      Is the resistance below 10K Ohms?

      Yes 

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

      No 

      • Repair the (Z910) ground circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .