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LAN ECM BRANCH LINE CIRCUIT LAN-93 < COMPONENT DIAGNOSIS > [CAN SYSTEM (TYPE 5)] C D E F G H I J K L B A O P N ECM BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000004471811 INSPECTION 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 con- nector side). - ECM - Harness connector E30 - Harness connector M1 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. • QR engine models for California: • QR engine models expect for California: • VQ engine models: EC-1175, "Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>Replace the ECM. Refer to the following. • QR engine models for California: EC-27, "ADDITIONAL SERVICE WHEN REPLACING CON- TROL UNIT : Special Repair Requirement" • QR engine models except for California: EC-563, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : YES (Past error)>>Error was detected in the ECM branch line. NO >> Repair the power supply and the ground circuit. ECM harness connector Resistance ( Ω) Connector No. Terminal No. E10 98 97 Approx. 108 – 132 |