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TROUBLESHOOTING MULTIPOINT FUEL INJECTION (MPI) 13A-173 NOTE: * 1: The shown voltage is the average value where an analogue voltmeter is used (because a digital voltmeter may not be able to indicate the average voltage stably). NOTE: * 2: If the battery is fully charged, the output reading may be incorrect. CHECK CHART FOR RESISTANCE AND 1. Turn the ignition switch to "LOCK" (OFF) position. 2. Disconnect the engine-ECU connector. 3. Measure the resistance and check for continuity between the terminals of the engine-ECU NOTE: . 1. When measuring resistance and checking continuity, a harness for checking contact pin 2. Checking need not be carried out in the order given in the chart. CAUTION If the terminals that should be checked are mis- meter. Be careful to prevent this! 4. If the ohmmeter shows any deviation from the standard value, check the corresponding sensor, 82 BAT1 Power supply Ignition switch: "ON" System voltage 84 C/RL Throttle valve control Ignition switch: "LOCK" (OFF) 0 − 0.1 V Ignition switch: "ON" 1 V or less 87 AFS Air flow sensor Engine: Gradually increase the speed Voltage increase in 89 ATS Intake air temperature Ignition switch: "ON" When the intake air temperature is 3.8 − 4.4 V When the intake air °C 3.2 − 3.8 V When the intake air °C 2.3 − 2.9 V When the intake air °C 0.4 − 1.0 V 92 IGN Ignition switch − IG Ignition switch: "ON" System voltage 96 FP/R Fuel pump relay Ignition switch: "ON" System voltage Engine: Idle operation 1 V or less 97 AFS5 Applied voltage to the Ignition switch: "ON" 4.9 − 5.1 V 102 AC/R A/C compressor relay • Engine: Idle operation • A/C switch: "OFF" → "ON" (when the compressor is active) System voltage → 1 V or less. 104 BACK Backup power supply Ignition switch: "LOCK" (OFF) System voltage 105 ST Ignition switch − ST Engine: Cranking System voltage 106 STRL Starter relay Engine: Cranking System voltage Engine: Idle operation 1 V or less Termin Termi Inspection Item Check condition (Engine condition) Normal condition |