Accelerator pedal checks
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Accelerator controls › Accelerator pedal checks
ACCELERATOR PEDAL CHECKS
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | Press the START/STOP button and turn off the engine. With the engine off, all users off and the accelerator pedal not operated, the accelerator pedal value should be 0%. Under the same conditions, the value of accelerator pedal position 1 AD/C should be less than 1 V and accelerator pedal position 2 AD/C less than 0.5 V | Move on to Step 4 |
| 2 | With the accelerator pedal slightly operated, the value of accelerator pedal postion 1 AD/C must be greater than 1 V and accelerator pedal position 2 AD/C greater than 0.5 V | Move on to Step 4 |
| 3 | With the accelerator pedal pushed down to the floor, accelerator pedal value must be greater than 90%. Under the same conditions, the value of accelerator pedal position 1 AD/C should be greater than 3 V and accelerator pedal position 2 AD/C greater than 1.5 V The test can be considered over | Move on to Step 4 |
| 4 | Press the START/STOP button and turn off the engine. Disconnect the wiring harness connector from the accelerator pedal potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Press the START/STOP button. Measure the voltage between Pin 2 of the solenoid wiring side connector and Earth. Ensure it is greater than 4.8 kOhm. See K055 ACCELERATOR PEDAL POTENTIOMETER Move on to Step 6 | Move on to Step 5 |
| 5 | If faults are present, repair or if necessary replace the electrical wiring between the engine control unit and the accelerator pedal potentiometer. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine management control unit |
| 6 | Measure the voltage between Pins 2 and 4 of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 7 | Press the START/STOP button. Connect a cable upstream with a fuse between pins 4 and 3 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Press the START/STOP button. Check that accelerator pedal position 1 AD/C is less than 0.3 V | Move on to Step 5 |
| 8 | Press the START/STOP button. Disconnect the cable upstream and reconnect between pins 2 and 3 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Press the START/STOP button. Check that accelerator pedal position 1 AD/C is greater than 4.8 V | Move on to Step 5 |
| 9 | Measure the voltage between Pin 1 of the potentiometer and Earth. Ensure it is greater than 4.8 V. | Move on to Step 5 |
| 10 | Measure the voltage between Pins 1 and 5 of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 11 | Press the START/STOP button. Connect the cable upstream as a shunt between pins 5 and 6 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Press the START/STOP button. Check that accelerator pedal position 2 AD/C is less than 0.3 V | Move on to Step 5 |
| 12 | Press the START/STOP button. Disconnect the cable upstream and reconnect between pins 1 and 6 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Press the START/STOP button. Check that accelerator pedal position 2 AD/C is greater than 4.8 V | Move on to Step 5 |
| 13 | Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
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