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EC-790 < COMPONENT DIAGNOSIS > [MR18DE] POWER SUPPLY AND GROUND CIRCUIT • Harness connectors F8, E8 >> Repair open circuit or short to power in harness or connectors. 7. CHECK ECM POWER SUPPLY CIRCUIT-II 1. Reconnect ECM harness connectors. 2. Turn ignition switch ON. 3. Check the voltage between IPDM E/R harness connector and ground. Is the inspection result normal? YES >> Go to NO >> GO TO 8. 8. CHECK ECM POWER SUPPLY CIRCUIT-III 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Check the voltage between ECM harness connector terminals as follows. Is the inspection result normal? YES >> GO TO 15. NO-1 >> Battery voltage does not exist: GO TO 9. NO-2 >> Battery voltage exists for more than a few seconds: GO TO 12. 9. CHECK ECM POWER SUPPLY CIRCUIT-IV 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Check the voltage between ECM harness connector terminals as follows. Is the inspection result normal? YES >> GO TO 10. NO >> GO TO 11. 10. CHECK ECM POWER SUPPLY CIRCUIT-V 1. Disconnect ECM harness connector. 2. Disconnect IPDM E/R harness connector. 3. Check the continuity between ECM harness connector and IPDM E/R harness connector. 4. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 12. IPDM E/R Ground Voltage Connector Terminal E43 3 Ground Battery voltage (+) (–) Voltage Connector Terminal Connector Terminal E16 105 E16 108 After turning ignition switch OFF, battery volt- (+) (–) Voltage Connector Terminal Connector Terminal F10 32 E16 108 Battery voltage ECM IPDM E/R Continuity Connector Terminal Connector Terminal E16 105 E43 4 Existed |