323000044 - 5040BA CHECK ON OPERATION OF MULTI-STAGE PRESSURE SWITCH/LINEAR SENSOR
| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Disconnect the cable loom connector from the linear sensor (for the climate control system). See K120 LINEAR SENSOR FOR FANS Measure the voltage between Pin 2 of the wiring side connector and Earth, checking it is within the range between 4.8 and 5.2 V. | Move on to Step 2. |
| 2 | Turn the ignition key OFF.Disconnect the wiring harness connector from the accelerator pedal potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key to MAR.Measure the voltage between Pin 2 of the sensor and Earth, checking it is within the range between 4.8 and 5.2 V. See K120 LINEAR SENSOR FOR FANS Move on to Step 5. | Move on to Step 6. |
| 3 | Disconnect the cable loom connector from the air flow meter and repeat the measurement, checking the voltage is in the range between 4.8 and 5.2 V. See K041 AIR FLOW METER | Move on to Step 6. |
| 4 | If faults are present, repair or if necessary replace the electrical wiring between the debimeter and the engine control unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered finished. | Replace the flow meter Op. 1060G10 AIR FLOW METER - R.R. |
| 5 | If faults are present, repair or if necessary replace the electrical wiring between the accelerator pedal potentiometer and the engine management control unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered finished. | Replace the accelerator pedal Op. 1060G10 AIR FLOW METER - R.R. |
| 6 | If faults are present, repair or if necessary replace the electrical wiring between the linear sensor and the engine control unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered finished. | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 7 | Measure the voltage between Pins 1 and 2 of the sensor, checking it is within the range between 4.8 and 5.2 V see See K120 LINEAR SENSOR FOR FANS | Move on to Step 8. |
| 8 | Disconnect the air flow meter See K041 AIR FLOW METER Measure the voltage between Pins 1 and 2 of the sensor, checking it is within the range between 4.8 and 5.2 V see See K120 LINEAR SENSOR FOR FANS | Move on to Step 6. |
| 9 | If faults are present, repair or if necessary replace the electrical wiring between the linear sensor and the engine control unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered finished. | Replace the pressure transducer Op. 5040B20 AIR CONDITIONING LINEAR PRESSURE TRANSDUCER - R.R. |
| 10 | Display the A/C Pressure parameter (conditioned air) and check it is less than 0.3 Volt | Move on to Step 6. |
| 11 | Connect a shunt connection cable with a fuse between Pins 2 and 3 of the sensor See K120 LINEAR SENSOR FOR FANS Display the A/C Pressure parameter (conditioned air) and check it is less than 4.8 V. Move on to Step 6 | Replace the pressure transducer Op. 5040B20 AIR CONDITIONING LINEAR PRESSURE TRANSDUCER - R.R. |