U1511

DTC U1511

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure Initial Inspection and Diagnostic Overview.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach Initial Inspection and Diagnostic Overview.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category Initial Inspection and Diagnostic Overview.

DTC Descriptors

DTC U1511 00: Inter-device Dedicated Bus Lost Communication With Device 1

Diagnostic Fault Information






Circuit/System Description

The Driver Information Center (DIC) displays the compass based on serial data message from the BCM. The compass module communicates with the body control module (BCM) through a Local Interconnect Network (LIN) circuit.

Conditions for Running the DTC

The system voltage is between 9-16 volts.

Conditions for Setting the DTC

- An open/high resistance, short to ground, or short to voltage in the local interconnect network bus circuit.
- An open or short to ground in the module voltage circuit.
- An open/high resistance in the module ground circuit.

Action Taken When the DTC Sets

The compass will be inoperative in the DIC.

Conditions for Clearing the DTC

- The current DTC will clear when the malfunction is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Diagnostic Aids

Use the DMM MIN/MAX function to capture/locate intermittent conditions.

Reference Information

Schematic Reference

- Data Communication Schematics Electrical Diagrams
- Instrument Cluster Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Connector Views

Description and Operation

Data Link Communications Description and Operation Description and Operation

Electrical Information Reference

- Circuit Testing Component Tests and General Diagnostics
- Connector Repairs Component Tests and General Diagnostics
- Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
- Wiring Repairs Component Tests and General Diagnostics

Scan Tool Reference

Control Module References for Scan Tool Information Control Module References

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the electronic compass module.
2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 2 and ground.

-> If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.

-> If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance.

4. Test for 6.0-7.0 volts between the LIN Bus circuit terminal 3 and ground.

-> If greater than the specified range, test the LIN Bus circuit for a short to voltage. If the circuit tests normal, replace the BCM.

-> If less than the specified range, test the LIN Bus circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, replace the electronic compass module.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for electronic compass module replacement, setup, and programming Control Module References