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 BASE, 2.4 B, AWD, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINTERIOR/ILLUMINATION LIGHTSCABIN COMPARTMENT NODE (CCN) - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGU1008-LIN 1 BUSDIAGNOSTIC TEST

2011 Jeep Compass Base, 2.4 B, AWD, Standard

Diagnostic Test

2011 Jeep Compass Base, 2.4 B, AWD, StandardSECTION Diagnostic Test

CHECK FOR AN ACTIVE 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: U1008-LIN 1 BUS?
  
  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.
SHORTED LIN BUS COMPONENT
NOTE:
After disconnecting each component, check DTCs with the scan tool.
1. Turn the ignition on.
2. Disconnect the Switch Bank Module harness connector.
3. Disconnect the Remote Compass Module harness connector.
4. Disconnect the Heated Seat Module harness connector.
5. Disconnect the Left Multifunction Switch harness connector.
6. Disconnect the Right Steering Wheel Switch (Speed Control Switch) harness connector.
  With each component disconnected, did the DTC U1008-LIN 1 BUS change from active to stored?
  
  Yes
  - Replace the component that caused the DTC U1008-LIN 1 BUS change from active to stored.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Go To 3.
(D506) LIN BUS CIRCUIT OPEN
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Disconnect the Switch Bank harness connector.
4. Measure the resistance of the (D506) LIN Bus circuit between the Cluster C3 and Switch Bank harness connectors.
  Is the resistance above 10K Ohms?
  
  Yes
  - Repair the open in the (D506) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Go To 4.
(D506) LIN BUS CIRCUIT SHORTED TO GROUND

Fig 1: Checking LIN BUS Circuit Shorted To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance to ground on the (D506) LIN Bus circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the short to ground (D506) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE - BODY VERIFICATION TEST .
  No
  - Replace the Cluster in accordance with the Service Information.
  - 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.