CAN

ECM BRANCH LINE CIRCUIT

Diagnosis Procedure


1. CHECK CONNECTOR

1.Turn the ignition switch OFF.
2.Disconnect the battery cable from the negative terminal.
3.Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
- ECM
-Harness connector E105
-Harness connector M77
Is the inspection result normal?
YES- GO TO 2.
NO- Repair the terminal and connector.

2. CHECK HARNESS FOR OPEN CIRCUIT

1.Disconnect the connector of ECM.
2.Check the resistance between the ECM harness connector terminals.





Is the measurement value within the specification?
YES- GO TO 3.
NO- Repair the ECM branch line.

3. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to the following.
- Except for Mexico: "Diagnosis Procedure" Except For Mexico
- For Mexico: "Diagnosis Procedure" For Mexico
Is the inspection result normal?
YES (Present error)-Replace the ECM. Refer to the following.
- Except for Mexico: "BASIC INSPECTION : Special Repair Requirement" Basic Inspection
- For Mexico: "BASIC INSPECTION : Special Repair Requirement" Basic Inspection
YES (Past error)-Error was detected in the ECM branch line.
NO- Repair the power supply and the ground circuit.