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Diagnostic Procedure NCEC0285 1 CHECK POWER SUPPLY 1. Turn ignition switch “OFF”. NEF246A 3. Turn ignition switch “ON”. SEF352QA Voltage: Battery voltage OK or NG OK © GO TO 3. NG © GO TO 2. 2 DETECT MALFUNCTIONING PART Check the following. I Harness connectors E90, F73 I 10A fuse I Harness for open or short between IACV-AAC valve and battery © Repair harness or connectors. 3 CHECK OUTPUT SIGNAL CIRCUIT 1. Turn ignition switch “OFF”. ECM terminal 6 and IACV-AAC valve terminal 1, Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK © GO TO 4. NG © Repair open circuit or short to ground or short to power in harness or connectors. Throttle body Throttle position sensor IACV-AAC valve DTC P0505 IDLE AIR CONTROL VALVE (IACV) — AUXILIARY AIR CONTROL (AAC) VALVE QG16 I 18DE Diagnostic Procedure EC-277 |