Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup and 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

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 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 COMPONENT
NOTE:
After disconnecting each component, check DTCs with the scan tool.
1. Turn the ignition on.
2. Disconnect the Upper Switch Bank harness connector.
3. Disconnect the Lower Switch Bank harness connector.
4. Disconnect the Compass Module harness connector.
5. Disconnect the Multifunction Switch harness connector.
6. Disconnect the Right Steering Wheel 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 BODY VERIFICATION TEST for 1500, 2500 & 3500, or BODY VERIFICATION TEST for 3500 CAB & CHASSIS, 4500 & 5500.
  No
  - Go To 3.
(D506) LIN BUS CIRCUIT OPEN

Fig 1: Checking LIN Bus Circuit For Open
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Cluster C3 harness connector.
3. Disconnect the Upper Switch Bank harness connector.
4. Measure the resistance of the (D506) LIN Bus circuit.
  Is the resistance above 10K Ohms?
  
  Yes
  - Repair the (D506) LIN Bus circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST for 1500, 2500 & 3500, or BODY VERIFICATION TEST for 3500 CAB & CHASSIS, 4500 & 5500.
  No
  - Go To 4.
(D506) LIN BUS CIRCUIT SHORTED TO GROUND

Fig 2: Checking LIN Bus Circuit For 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 (D506) LIN Bus circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST for 1500, 2500 & 3500, or BODY VERIFICATION TEST for 3500 CAB & CHASSIS, 4500 & 5500.
  No
  - Replace the Cluster in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST for 1500, 2500 & 3500, or BODY VERIFICATION TEST for 3500 CAB & CHASSIS, 4500 & 5500.