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P0643 SENSOR POWER SUPPLY EC-351 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect accelerator pedal position (APP) sensor harness connector. 2. Turn ignition switch ON. 3. Check voltage between APP sensor terminal 2 and ground with CONSULT or tester. OK or NG OK >> GO TO 6. NG >> GO TO 3. 3. CHECK SENSOR POWER SUPPLY CIRCUITS Check harness for short to power and short to ground, between the following terminals. OK or NG OK >> GO TO 4. NG >> Repair short to ground or short to power in harness or connectors. 4. CHECK COMPONENTS Check the following. • Battery current sensor (Refer to EC-374, "Component Inspection" .) • Camshaft position sensor (Refer to EC-265, "Component Inspection" • Power steering pressure sensor (Refer to EC-344, "Component Inspection" • Throttle position sensor (Refer to EC-187, "Component Inspection" .) OK or NG OK >> GO TO 5. NG >> Replace malfunctioning component. 5. CHECK APP SENSOR EC-424, "Component Inspection" OK or NG OK >> GO TO 7. BBIA0592E Voltage: Approximately 5V PBIB2608E ECM terminal Sensor terminal 47 Throttle position sensor terminal 2 51 Battery current sensor terminal 1 55 Power steering pressure sensor terminal 3 59 Camshaft position sensor terminal 1 83 Accelerator pedal position sensor terminal 2 |