U1008

U1008 - LIN 1 Bus






For a complete wiring diagram, refer to.

• When Monitored: With the ignition ON.

• Set Condition: LIN 1 bus Performance.






Test Step 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

• Go to Test Step 2 => [ Test Step 2 - Shorted Component ]

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 chafed, 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. Refer to => Non - DTC Based Diagnostics. Body Interior

Test Step 2 - Shorted Component

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

• Turn the ignition ON.

• Disconnect the compass module harness connector.

• Disconnect the heated seat module harness connector.

• Disconnect the steering control module C1, C2 harness connectors.

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 to change from active to stored.

• Perform the Body Verification Test. Refer to => Non - DTC Based Diagnostics. Body Interior

No

• Go to Test Step 3 => [ Test Step 3 - LIN Bus Circuit Open ]

Test Step 3 - LIN Bus Circuit Open






• Turn the ignition OFF.

• Disconnect the cluster C2 harness connector.

• Disconnect the compass module harness connector.

• Measure the resistance of the LIN bus circuit.

Is the resistance above 10K ohms?

Yes

• Repair the LIN bus circuit for an open.

• Perform the Body Verification Test. Refer to => Non - DTC Based Diagnostics. Body Interior

No

• Go to Test Step 4 => [ Test Step 4 - LIN Bus Circuit Short to Ground ]

Test Step 4 - LIN Bus Circuit Short to Ground






• Turn the ignition OFF.

• Measure the resistance to ground on the LIN bus circuit.

Is the resistance below 10K ohms?

Yes

• Repair the LIN bus circuit for a short to ground.

• Perform the Body Verification Test. Refer to => Non - DTC Based Diagnostics. Body Interior

No

• Replace the cluster.

• Perform the Body Verification Test. Refer to => Non - DTC Based Diagnostics. Body Interior