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b voltmeter method: Remove sensor connector, turn ignition on, measure 5V reference voltage at sensor connection. Connect a voltmeter between Pin B22 and ground. If 5V reference voltage is not sufficient, check ECU voltage at this wire. If ECU voltage is normal but not sufficient at sensor, repair 5V reference voltage wire. If ECU voltage is low, test ECU. Connector sensor connector, turn ignition on, connect a voltmeter between sensor signal wire (Pin B17) and ground wire. Voltmeter reading shows throttle open signal from sensor to ECU. Depress throttle slowly and watch voltage change. Voltage reading should be even and increase gradually. Voltage output should be 0.5±0.02V when engine idles and ≤4.85V at throttle wide open.
Fuel supply system 2.2.1 fuel filter
a DO NOT install fuel filter at an opposite direction, otherwise a new one should be installed (even it has been used for a short time). There is an arrow marked on fuel filter house showing fuel direction. b Fuel filter should be replaced every 20000-30000km. After replacement, start engine and check if there exists fuel leakage.
2.2.2 fuel injector If vehicle is not used for a long time, run engine for 3-5 minutes every 2-3 months to avoid fuel injector being blocked. Fuel injector must be washed at least one time once a year. Fuel injector specifications: Coil resistance: 13.7±0.68Ω Coil induction: 19.6±1.9Mh
2.2.3 fuel pressure regulator Fuel pressure regulator is used to maintain fuel pressure to fuel injector within specification. Remaining fuel is returned to fuel tank through fuel return pipe.
1 Connecting to vacuum connector 2 Connecting to return pipe, maintaining a constant pressure to fuel tank.
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