| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|
| 1 | Sensor power supply checkConnect to pins 1 and 3 of the pressure sensor connector using the Examiner in the voltmeter function. Turn the ignition key to the ON positionCheck that the voltage is around 5 Volt | Restore the continuity of the wiring between the engine management control unit and the pressure sensor.If the supply is interrupted at the engine management control unit outlet, replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |
| 2 | Pressure signal checkConnect the Examiner in voltmeter mode: black probe at pin 1 of the sensor and red probe at pin 4Start the engineCheck for a voltage signal of around 1 Volt that increases when accelerating as illustrated in the graph | Replace the intake air pressure/temperature sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R. |
| 3 | Temperature signal checkDisconnect the connector from the sensorConnect using the Examiner in ohmmeter mode at pins 1 and 2 of the sensorCheck the resistance as enclosed. | Replace the intake air pressure/temperature sensor Op. 1056B54 INTAKE AIR PRESSURE/TEMPERATURE SENSOR - R.R. |
