Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSJEEP2011COMPASS LIMITED, FWD, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMCABIN COMPARTMENT NODE (CCN) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGU113B-LOST COMMUNICATION WITH SWITCH BANK MODULEDIAGNOSTIC TEST

2011 Jeep Compass Limited, FWD, Standard

Diagnostic Test

2011 Jeep Compass Limited, FWD, StandardSECTION Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display: U113B-LOST COMMUNICATION WITH SWITCH BANK MODULE?
  
  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.
(D506) LIN BUS CIRCUIT OPEN

Fig 1: Checking LIN BUS Circuit Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Switch Bank harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (D506) LIN BUS circuit.
  Is the voltage above 5.0 volts?
  
  Yes
  - Go To 3.
  No
  - Repair the (D506) LIN BUS circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(A935) FUSED B+ CIRCUIT OPEN

Fig 2: Checking Fused B+ Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the voltage of the (A935) Fused B+ circuit.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 4.
  No
  - Repair the (A935) Fused B+ circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
(Z908) GROUND CIRCUIT OPEN

Fig 3: Checking Ground Circuit Open
Courtesy of CHRYSLER LLC
1. Measure the resistance between ground and the (Z908) Ground circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Replace the Switch Bank in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Repair the (Z908) Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .

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.