|
|
ECM-146 < DTC/CIRCUIT DIAGNOSIS > [MR20DD] POWER SUPPLY AND GROUND CIRCUIT YES >> Go to 5. NO >> Go to 6. 5. CHECK ECM POWER SUPPLY-2 Check the voltage between ECM harness connector and ground. Is the inspection result normal? YES >> Go to 9. NO >> Go to 7. 6. CHECK ECM POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Disconnect IPDM E/R harness connector. 4. Check the continuity between ECM harness connector and IPDM E/R harness connector. 5. Also check harness for short to power. Is the inspection result normal? YES >> Perform trouble diagnosis for power supply. NO >> Repair or replace malfunctioning part. 7. CHECK ECM RELAY CONTROL SIGNAL Check the voltage between ECM harness connector terminals as per the following. Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-41, "Intermittent Incident" . NO >> Go to 8. 8. CHECK ECM RELAY CONTROL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Disconnect IPDM E/R harness connector. 4. Check the continuity between ECM harness connector and IPDM E/R harness connector. ECM Condition Voltage (Approx.) Connector + − Terminal E57 121 128 Ignition switch ON → OFF After turning ignition switch OFF, battery + − Continuity ECM IPDM E/R Connector Terminal Connector Terminal E57 121 F90 103 Existed ECM Condition Voltage (Approx.) Connector + − Terminal E57 121 128 Ignition switch ON 0 V Turn ignition switch OFF and Battery voltage |