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LAN ECM BRANCH LINE CIRCUIT LAN-453 < COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 29)] C D E F G H I J K L B A O P N ECM BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000001100438 1. CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and 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. - HR engine/MR engine models - K9K engine models 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. • HR16DE (Without EURO-OBD): • MR20DE (With EURO-OBD): • MR20DE (Without EURO-OBD): EC-1069, "Diagnosis Procedure" EC-1317, "Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>•Replace the ECM. Refer to the following. - HR16DE (With EURO-OBD): EC-29, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" EC-368, "ADDITIONAL SERVICE WHEN REPLACING CON- TROL UNIT : Special Repair Requirement" - MR20DE (With EURO-OBD): EC-645, "ADDITIONAL SERVICE WHEN REPLACING CON- TROL UNIT : Special Repair Requirement" - MR20DE (Without EURO-OBD): EC-989, "ADDITIONAL SERVICE WHEN REPLACING CON- TROL UNIT : Special Repair Requirement" EC-1273, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair YES (Past error)>>Error was detected in the ECM branch line. >> Repair the power supply and the ground circuit. ECM harness connector Resistance ( Ω ) Connector No. Terminal No. E16 84 83 Approx. 108 – 132 ECM harness connector Resistance ( Ω ) Connector No. Terminal No. E60 100 99 Approx. 108 – 132 |