Diagnostic Test

WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR AN ACTIVE DTC
Turn the ignition on.

With the scan tool, record and erase DTCs.

Wait 30 seconds.

With the scan tool, read DTCs.

Does the scan tool display: U1008-LIN 1 BUS?

Yes
1. Go to 2).
No
1. 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 chaffed, pierced, pinched and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded or contaminated terminals.
2. Perform BODY VERIFICATION TEST - VER 1 .
2) SHORTED COMPONENT

Fig 1: Identifying Harness Connectors
Courtesy of CHRYSLER LLC

NOTE: After disconnecting each component, check DTCs with the scan tool.

Turn the ignition on.

Disconnect the Switch Bank harness connector.

Disconnect the Compass Module harness connector.

Disconnect the Heated Seat Module harness connector.

Disconnect the Front Window Switch harness connector.

Disconnect the Steering Control Module C1 harness connector.

With each component disconnected, did the DTC U1008-LIN 1 BUS change from active to stored?

Yes
1. Replace the component that caused the DTC U1008-LIN 1 BUS change from active to stored.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go to 3).
3) (D506) LIN BUS CIRCUIT OPEN

Fig 2: Measuring Resistance Of LIN Bus Circuit
Courtesy of CHRYSLER LLC

Turn the ignition off.

Disconnect the Cluster C3 harness connector.

Disconnect the Switch Bank harness connector.

Measure the resistance of the (D506) LIN Bus circuit.

Is the resistance above 10K ohms?

Yes
1. Repair the (D506) LIN Bus circuit for an open.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Go to 4).
4) (D506) LIN BUS CIRCUIT SHORT TO GROUND

Fig 3: Measuring Resistance To Ground On LIN Bus Circuit
Courtesy of CHRYSLER LLC

Measure the resistance to ground on the (D506) LIN Bus circuit.

Is the resistance below 10K ohms?

Yes
1. Repair the (D506) LIN Bus circuit for a short to ground.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the Cluster in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .