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HOMESERVICE MANUALSJEEP2011WRANGLER SPORT, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESCABIN COMPARTMENT NODE (CCN) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGU113B-LOST COMMUNICATION WITH SWITCH BANK MODULEDIAGNOSTIC TEST
2011 Jeep Wrangler Sport, Automatic

Diagnostic Test

2011 Jeep Wrangler Sport, AutomaticSECTION Diagnostic Test
  1. CHECK FOR AN ACTIVE DTC 
    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 

      • 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 the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  2. (D506) LIN BUS CIRCUIT 
    Fig 1: Measuring Voltage Of LIN Bus Circuit
    GC0149174Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Switch Bank Module 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  4.

      No 

      • Go To  3.
  3. (D506) LIN BUS CIRCUIT OPEN 
    Fig 2: Checking LIN Bus Circuit For An Open
    GC0149175Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Cluster C2 harness connector.
    3. Measure the resistance of the (D506) LIN BUS circuit.

      Is the resistance below 10k Ohms?

      Yes 

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

      No 

      • Repair the (D506) LIN BUS circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  4. (A909) FUSED B+ CIRCUIT OPEN 
    Fig 3: Checking Fused B+ Circuit For An Open
    GC0149176Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition on.
    2. Measure the voltage of the (A909) Fused B+ circuit at the Switch Bank Module harness connector.

      Is the voltage above 10 volts?

      Yes 

      • Go To  5.

      No 

      • Repair the (A909) Fused B+ circuit for an open. Inspect the related fuse. If the fuse is open, check the circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  5. (Z911) GROUND CIRCUIT OPEN 
    Fig 4: Checking Ground Circuit For An Open
    GC0149177Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Using an Ohm meter, measure the resistance between ground and the (Z911) Ground circuit at the Switch Bank Module harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

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

      No 

      • Repair the (Z911) ground circuit for an open.
      • Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
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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.