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HOMESERVICE MANUALSJEEP2013WRANGLER SPORT, AUTOMATIC TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 249 ((STEERING CONTROL MODULE (SCM) - ELECTRICAL DIAGNOSTICS))DTC TROUBLESHOOTINGU1009-00-LIN 2 BUSDIAGNOSTIC TEST
2013 Jeep Wrangler Sport, Automatic Trans

Diagnostic Test

2013 Jeep Wrangler Sport, Automatic TransSECTION Diagnostic Test
WARNING: This page is about a different car, the 2016 Dodge Journey and 2015 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    Before proceeding with the diagnostic procedure, verify that the connections are properly made, seated and verify proper pin terminal tension. A loose connection at any of the SCM connectors may cause the 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.
  2. CHECK FOR LIN BUS CIRCUIT LOCKED CONDITION AT THE RIGHT STEERING WHEEL SWITCH (SPEED CONTROL SWITCH) 
    1. Actuate the horn.
    2. With the scan tool, read DTCs.

      Does the scan tool display this DTC as active?

      Yes 

      • Go To  3

      No 

  3. CHECK THE VOLTAGE OF (D506) LIN BUS CIRCUIT AT THE RIGHT STEERING WHEEL SWITCH (SPEED CONTROL SWITCH) 
    1. Turn the ignition off.
    2. Disconnect the Right Steering Wheel Switch (Speed Control Switch) harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (D506) LIN Bus circuit.

      Is voltage present?

      Yes 

      • Go To  7

      No 

      • Go To  4
  4. (D506) LIN BUS CIRCUIT OPEN BETWEEN THE RIGHT STEERING WHEEL SWITCH (SPEED CONTROL SWITCH) AND CLOCKSPRING 
    1. Turn the ignition off.
    2. Disconnect the SCM C6 harness connector.
    3. Measure the resistance of the (D506) LIN Bus circuit between the Right Steering Wheel Switch (Speed Control Switch) and SCM C6 harness connectors.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the open in the (D506) LIN Bus circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  5. (D506) LIN BUS CIRCUIT SHORT TO GROUND BETWEEN THE RIGHT STEERING WHEEL SWITCH (SPEED CONTROL SWITCH) AND CLOCKSPRING 
    1. Measure the resistance between ground and the (D506) LIN Bus circuit at the Right Steering Wheel Switch (Speed Control Switch) harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the short to ground on the (D506) LIN Bus circuit.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE VOLTAGE OF (D506) LIN BUS CIRCUIT AT THE CLOCKSPRING 
    1. Disconnect the SCM C2 harness connector.
    2. Turn the ignition on.
    3. Measure the voltage of the (D506) LIN Bus circuit at the SCM C2 harness connector.

      Is voltage present?

      Yes 

      WARNING:

      Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.