U1109

U1109 - Lost Communication With LIN Steering Wheel Controls






For a complete wiring diagram, refer to.

• When Monitored: With the ignition ON.

• Set Condition: The cluster does not receive any LIN bus messages from the steering control module.






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.

Is this DTC active?

Yes

• Go to Test Step 2 => [ Test Step 2 - LIN Bus Circuit Open ]

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 - LIN Bus Circuit Open






• Turn the ignition OFF.

• Disconnect the cluster C2, harness connector.

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

• Measure the resistance of the LIN bus circuit between the cluster and the steering control module C1 and C2 harness connectors.

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

• Replace the steering control module.

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