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POWER SUPPLY AND GROUND CIRCUIT EC-1091 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR MEXICO] C D E F G H I J K L M A EC N P O POWER SUPPLY AND GROUND CIRCUIT Diagnosis Procedure INFOID:0000000009481727 1. INSPECTION START Start engine. Is engine running? Yes >> GO TO 8. No >> GO TO 2. 2. CHECK ECM POWER SUPPLY CIRCUIT-I 1. Turn ignition switch OFF and then ON. 2. Check voltage between ECM terminal 109 and ground with CONSULT or tester. OK or NG OK >> GO TO 4. NG >> GO TO 3. 3. DETECT MALFUNCTIONING PART Check the following. • Fuse block (J/B) connector M4 • Harness connectors M31, E152 • 10A fuse (No.1) • Harness for open or short between ECM and fuse >> Repair harness or connectors. 4. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. 2. Loosen and retighten three ground screws on the body. Refer to . OK or NG OK >> GO TO 5. NG >> Repair or replace ground connections. 5. CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I 1. Disconnect ECM harness connector. 2. Check harness continuity between ECM terminals 1, 115, 116 and ground. Refer to Wiring Diagram. Voltage: Battery voltage MBIB0015E BBIA0539E Continuity should exist. |