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LAN-94 < COMPONENT DIAGNOSIS > [CAN] CAN COMMUNICATION CIRCUIT CAN COMMUNICATION CIRCUIT Diagnosis Procedure INFOID:0000000003938770 1. CONNECTOR INSPECTION 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Disconnect all the unit connectors on CAN communication system. 4. Check terminals and connectors for damage, bend and loose connection. Is the inspection result normal? YES >> GO TO 2. NO >> Repair the terminal and connector. 2. CHECK HARNESS CONTINUITY (SHORT CIRCUIT) Check the continuity between the data link connector terminals. Is the inspection result normal? YES >> GO TO 3. NO >> Check the harness and repair the root cause. 3. CHECK HARNESS CONTINUITY (SHORT CIRCUIT) Check the continuity between the data link connector and the ground. Is the inspection result normal? YES >> GO TO 4. NO >> Check the harness and repair the root cause. 4. CHECK ECM AND IPDM E/R TERMINATION CIRCUIT 1. Remove the ECM and the IPDM E/R. 2. Check the resistance between the ECM terminals. 3. Check the resistance between the IPDM E/R terminals. Is the measurement value within the specification? YES >> GO TO 5. NO >> Replace the ECM and/or the IPDM E/R. 5. CHECK SYMPTOM Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with Data link connector Continuity Connector No. Terminal No. M22 6 14 Not existed Data link connector Ground Continuity Connector No. Terminal No. M22 6 Not existed 14 Not existed ECM Resistance ( Ω ) Terminal No. 94 86 Approx. 108 – 132 IPDM E/R Resistance ( Ω ) Terminal No. 39 40 Approx. 108 – 132 LKIA0037E 2009 Pathfinder |