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MPI <4G9> – Troubleshooting 13C-82 Terminal Normal condition Check condition (Engine condition) Check item 21 Radiator motor relay (LO) Radiator fan and condenser fan are not _ C or less) System voltage Radiator fan and condenser fan are not _ C or less) 0 – 3 V 22 Fuel pump relay Ignition switch: ON System voltage Engine: Idle speed 0 – 3 V 33 Alternator G terminal D Engine: Warm, idle D Headlamp: OFF to ON D Rear defogger switch: OFF to ON D Brake lamp: ON Voltage rises by 0.2 – 3.5 V. 41 Alternator FR terminal D Engine: Warm, idle D Headlamp: OFF to ON D Rear defogger switch: OFF to ON D Brake lamp: ON Voltage drops by 0.2 – 3.5 V. 36 Engine warning lamp Ignition switch: “LOCK” (OFF) position → ON 0 – 3 V → 9 – 13 V (After several seconds have 37 Power steering fluid Engine: Idling after When steering System voltage When steering 0 – 3 V 38 Control relay Ignition switch: “LOCK” (OFF) position System voltage (Power supply) Ignition switch: ON 0 – 3 V 45 A/C switch 1 Engine: Idle speed Turn the A/C 0 – 3 V Turn the A/C System voltage 58 Tachometer signal Engine r/min: 3,000 r/min 0.3 – 3.0 V 60 Oxygen sensor (front) Engine: Idling after warming up 0 – 3 V heater Engine r/min: 5,000 r/min System voltage 54 Oxygen sensor (rear) Engine: Idling after warming-up 0 – 3 V heater Engine r/min: 5,000 r/min System voltage 71 Ignition switch – ST Engine: Cranking 8 V or more |