For 1990-2009 cars only
Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC U1511 00: LIN Bus 1 Lost Communication with Device 1Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage |
|---|---|---|---|
Ignition | U1511 | U1511 | -- |
Serial Data | U1511 | U1511 | U1511 |
Ground - Electronic Compass Module | -- | U1511 | -- |
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 the Local Interconnect Network (LIN) bus circuit.
Conditions for Running the DTC
The system voltage is between 9-16 volts.
Conditions for Setting the DTC
| • | The DTC will set when there is an open/high resistance, short to ground, or short to voltage in the LIN bus circuit. |
| • | The DTC will set when there is an open/high resistance or short to ground in the ignition circuit to the module. |
| • | The DTC will set when there is an open/high resistance in the ground circuit to the module. |
Action Taken When the DTC Sets
The compass is 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. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Driver Information Center (DIC) Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the electronic compass module.
- Ignition OFF, test for less than 5.0 Ω between the ground circuit terminal 2 and ground.
- Ignition ON, verify a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
- Test for 6.0-7.0 volts between the LIN bus circuit terminal 3 and ground.
- If all circuits test normal, replace the electronic compass module.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for electronic compass module replacement, setup, and programming
