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Home >> Dodge and Ram >> 2008 >> Challenger >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Steering Control Module (SCM) - Electrical Diagnostics >> DTC Troubleshooting >> U1109-Lost Communication With Lin Steering Wheel Controls >> Diagnostic Test
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Diagnostic Test

  1. DTC IS ACTIVE 
    NOTE:

    If P0562-BATTERY VOLTAGE LOW or P0563-BATTERY VOLTAGE HIGH is set along with this DTC, diagnose the battery voltage DTC first.

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

      Is this DTC active?

      Yes 

      • Go To  2.

      No 

      • The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
      • Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  2. LIN BUS WIRING AND CONNECTORS 
    1. Turn the ignition off.
    2. Remove the Driver Airbag in accordance with the Service Information.
      NOTE:

      Before proceeding, thoroughly inspect the wiring harness and connectors between the Clockspring and the Right Steering Switch for a short to ground or any other circuit.

    3. Disconnect the Right Steering Switch harness connector.
    4. Disconnect the SCM C4 harness connector.
    5. Measure the resistance of the following LIN Bus circuits:
      • The (D500) LIN Bus circuit between the Right Steering Switch harness connector and the SCM C4 harness connector (Steering Pad side).
      • The (D501) LIN Bus Slave Return circuit between the Right Steering Switch harness connector and the SCM C4 harness connector (Steering Pad side).
      • The (D502) LIN Bus Slave Feed circuit between the Right Steering Switch harness connector and the SCM C4 harness connector (Steering Pad side).

      Is the resistance above 5.0 Ohms for any of the LIN Bus circuits?

      Yes 

      • Repair the LIN Bus circuit(s) for an open.
      • Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  3.
  3. CLOCKSPRING 
    1. Remove the Clockspring in accordance with the Service Information.
    2. Measure the resistance of the following LIN Bus circuits:
      • The (D500) LIN Bus circuit between the Clockspring connector to the SCM and the SCM C4 harness connector (Clockspring side).
      • The (D501) LIN Bus Slave Return circuit between the Clockspring connector to the SCM and the SCM C4 harness connector (Clockspring side).
      • The (D502) LIN Bus Slave Feed circuit between the Clockspring connector to the SCM and the SCM C4 harness connector (Clockspring side).

      Is the resistance above 5.0 Ohms for any of the LIN Bus circuits?

      Yes 

      • Repair the LIN Bus circuit(s) for an open.
      • Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  4.
  4. RIGHT STEERING SWITCH 
    1. Replace the Right Steering Switch in accordance with the Service Information.
    2. Reconnect the Clockspring.
    3. Reconnect the C206 (LIN Bus) connector.
    4. Turn the ignition on.
    5. With the scan tool, select Clear Stored DTCs in the Steering Control Module.
    6. With the scan tool, select View DTCs in the Steering Control Module.

      Does the DTC reset?

      Yes 

      • Go To  5.

      No 

      • Test complete.
  5. STEERING CONTROL MODULE (SCM) 

    Repair 

    • Replace the Steering Control Module (SCM) in accordance with the Service Information.
    • Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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