U1008

U1008-LIN 1 BUS

WHEN MONITORED
With the ignition on.

SET CONDITION
LIN 1 Bus Performance.

POSSIBLE CAUSES
- (D506) LIN BUS circuit open
- (D506) LIN BUS circuit short to ground
- Cluster

Diagnostic Test

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.

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

YES: Go To 2
NO: 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. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test




2. SHORTED COMPONENT

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.

Q: 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 - VER 1. Body Verification Test
NO: Go To 3




3. (D506) LIN BUS CIRCUIT OPEN

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.

Q: Is the resistance above 10K ohms?

YES: Repair the (D506) LIN Bus circuit for an open. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4




4. (D506) LIN BUS CIRCUIT SHORT TO GROUND

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

Q: Is the resistance below 10K ohms?

YES: Repair the (D506) LIN Bus circuit for a short to ground. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Cluster. Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test