199002993 - 1068AC ACCELERATOR PEDAL CHECKS

CHECK TO BE PERFORMEDRESOLUTION IF THE CHECK IS NOT OK
1Turn 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 VMove on to Step 4
2With 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 VMove on to Step 4
3With 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 VThe test can be considered overMove on to Step 4
4Turn 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 6Move on to Step 5
5If 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 overReplace the engine management control unit    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R
6Measure 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    See K055 ACCELERATOR PEDAL POTENTIOMETER Move on to Step 5
7Turn 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 VMove on to Step 5
8Turn 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 VMove on to Step 5
9Measure the voltage between Pin 1 (wiring side) of the potentiometer and Earth, ensuring it is greater than 4.8 V.    See K055 ACCELERATOR PEDAL POTENTIOMETER Move on to Step 5
10Measure 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    See K055 ACCELERATOR PEDAL POTENTIOMETER Move on to Step 5
11Turn 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 VMove on to Step 5
12Turn 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 VMove on to Step 5
13Replace the accelerator pedal    Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R