Accelerator pedal checks
- Make
- Fiat
- Model
- Grande Punto Factory Service Manual
- Year
- 2005–2012
- Section
- Accelerator controls › Accelerator pedal checks
ACCELERATOR PEDAL CHECKS
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | Turn the ignition key ON. 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 | Turn the ignition key OFF. Disconnect the wiring harness connector from the accelerator pedal potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition ON. Measure the voltage between Pin 2 (wiring side) of the potentiometer 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 (wiring side) of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 7 | Turn the ignition key OFF. Connect a shunt connection cable with a fuse between Pins 4 and 3 of the potentiometer (wiring side) See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. Check that accelerator pedal position 1 AD/C is less than 0.3 V | Move on to Step 5 |
| 8 | Turn the ignition key OFF. Disconnect the cable upstream and reconnect between pins 2 and 3 (wiring side) of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. 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 (wiring side) of the potentiometer and Earth, ensuring it is greater than 4.8 V. | Move on to Step 5 |
| 10 | Measure the voltage between Pins 1 and 5 (wiring side) of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 11 | Turn the ignition key OFF. Connect a shunt lead between pins 5 and 6 (wiring side) of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. Check that accelerator pedal position 2 AD/C is less than 0.3 V | Move on to Step 5 |
| 12 | Turn the ignition key OFF. Disconnect the cable upstream and reconnect between pins 1 and 6 (wiring side) of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. 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 |
| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK | |
|---|---|---|
| 1 | Turn the ignition key ON. With the engine off, all appliances off and the accelerator pedal not operated, the position of accelerator pedal 1 AD/C must be between 0.9 and 1.1 V. Under the same conditions, the position of accelerator pedal 2 AD/C must be between 0.4 and 0.6 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 operated to the maximum extent, accelerator pedal position 1 AD/C must be between 3.6 and 4.3 V. Under the same conditions, the position of accelerator pedal 2 AD/C must be between 1.8 and 2.2 V The test can be considered over | Move on to Step 4 |
| 4 | Turn the ignition key OFF. Turn off all the electrical users. Disconnect the wiring harness connector from the accelerator pedal potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. Measure the voltage between Pin 2 (wiring side) of the potentiometer wiring side connector and Earth, checking it is within the range between 4.8 and 5.2 V. 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 (wiring side) of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 7 | Check that accelerator pedal position 1 AD/C is less than 0.3 V | Move on to Step 5 |
| 8 | Connect a cable upstream with a fuse between pins 2 and 3 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. Check that accelerator pedal position 1 AD/C is between 4.8 and 5.2V | Move on to Step 5 |
| 9 | Disconnect the shunt connection. Measure the voltage between Pin 1 (wiring side) of the potentiometer and Earth, ensuring it is in a range between 4.8 and 5.2 V. | Move on to Step 5 |
| 10 | Measure the voltage between Pins 1 and 5 (wiring side) of the potentiometer to ensure they are in the range between 4.8 and 5.2 V | Move on to Step 5 |
| 11 | Check that accelerator pedal position 2 AD/C is less than 0.3 V | Move on to Step 5 |
| 12 | Turn the ignition key OFF. Connect a shunt lead with a fuse between pins 1 and 6 of the potentiometer See K055 ACCELERATOR PEDAL POTENTIOMETER Turn the ignition key ON. Check that accelerator pedal position 2 AD/C is between 2.3 and 2.7V | Move on to Step 5 |
| 13 | Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
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