Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

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
  - 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 one at a time, with the scan tool check DTCs for changing from active to stored.
1. Turn the ignition on.
2. Disconnect the Compass Module harness connector.
3. Disconnect the Upper and Lower Switch Bank harness connector.
4. Disconnect the Left Multifunction Switch harness connector.
5. Disconnect the Clockspring C2 harness connector.
6. Disconnect the Heated Seats Module harness connector.
  Did the DTC U1008-LIN 1 BUS change from active to stored when disconnecting any module/component?
  
  Yes
  - Check the module/component power and ground circuits that caused the DTC U1008-LIN 1 BUS to change from active to stored. If no problems are found, replace the module/component that caused this DTC to set.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(D506) LIN BUS CIRCUIT OPEN

Fig 1: Checking LIN Bus Circuit For An Open
Courtesy 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 between the Cluster C2 and Lower Switch Bank harness connectors.
  Is the resistance above 5.0 Ohms?
  
  Yes
  - Repair the open in the (D506) LIN Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(D506) LIN BUS CIRCUIT SHORTED TO GROUND

Fig 2: Measuring Resistance To Ground On LIN Bus Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance between ground and the (D506) LIN Bus circuit.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (D506) LIN Bus circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Check the power and ground circuits of both the Lower Switch Bank and the Cluster. If no problems are found, replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .