3360199 - C25 THE CAR GOES INTO NEUTRAL BY ITSELF

Whilst stoppingTravelling at a speed of below 40 km/hWhen stationary with a gear engaged (1st, 2nd or R)
Results of the tests
0OIL LEVEL CHECKAll OKProblems metOperation
Check the oil level See Test   2127B  OIL LEVEL CHECK Continue to Step 2Level below Max referenceTop up the levelContinue to Step 1
Level above Max referenceReduce to the Max levelContinue to Step 2
1CHECK FOR OIL LEAKSAll OKProblems metOperation
Check that there are no oil leaks See Test   2127C  CHECK FOR FLUID LEAKS Continue to Step 2Oil leaks detectedReplace/repair the relevant parts, and top up the oil levelContinue to Step 1
2OIL PRESSURE CHECKAll OKProblems metOperation
Check the oil pressure See Test   2127D  OIL PRESSURE CHECK
Neutral for low pressure only exists if the vehicle is stationary or moving at low speed (about 10-15 km/h)
Continue to Step 4Pressure < 40 barContinue to Step 3
3CHECK ON PUMP OPERATIONAll OKProblems metOperation
Check that the pump is working properly See Test   2127E  ELECTRIC PUMP OPERATION CHECK Continue to Step 4Voltage below 11 VCheck the batteryContinue to Step 3
It is not possible to make gear changes from the leverActivate the 'clutch bleed' service from the Examiner Plus or Smart to activate the pumpContinue to Step 3
4CONTROL UNIT ERRORS CHECKAll OKProblems metOperation

Check that there are no control unit errors. In particular:

  • Microprocessor 2 error (in the following condiions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h)
  • Errors on CAN network (in the following conditions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h)
  • Engine speed (in the following conditions: engine on, accelerator pedal released, brake not pressed and speed below 4.5 km/h)
  • Electromagnetic brake (Selection solenoid)
  • Clutch solenoid current
  • Clutch sensor
  • Selespeed pump
Continue to Step 7Presence of one or more of the errors included in the list Continue to Step 5
5CHECKS ON FAULTS DETECTEDAll OKProblems metOperation
Check the faults See Test   2127I  What to do depending on the error' present in the Selespeed control unit No accelerator pedal information. End of diagnosisOne of the control units does not dialogue (Errors on CAN network)Repair/replace the control unit concernedContinue to Step 6
Faulty connection (Engine speed)Repair/replace the part concernedContinue to Step 6
Faulty connections (Electromagnetic brake, Clutch solenoid current, Clutch sensor and/or Selespeed pump)Repair/replace the wiringContinue to Step 6
The test is not successful (Electromagnetic brake)Replace the solenoid valve Op.   2127C54  Continue to Step 6
There are no faulty connections (Clutch solenoid current)Replace the solenoid valve Op.   2127C56  and check its operation by carrying out a gear change.Continue to Step 6
There are no faulty connections (Clutch sensor)Replace the clutch actuator (CSC) and check its operation by carrying out a gear change.Continue to Step 6
Fault in pump relay and/or fuse (Selespeed pump)Replace the componentContinue to Step 6
Faults on pump winding (Selespeed pump)Replace the component Op.   2127C30  Continue to Step 6
6AFTER THE CHECKS ON THE FAULTS DETECTEDAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 7
7DOOR SWITCH CHECKAll OKProblems metOperation
Check the state of the driver's door switch (it should be remembered that the system recognizes the opening of the door if the accelerator pedal is released for 4 seconds, the brake not pressed and the speed is below 4.5 km/h)Continue to Step 9The door switch is not working properlyCheck the state of the connections, the wiring and the switch. Repair/replace the part that is not workingContinue to Step 8
8AFTER THE DOOR SWITCH CHECKAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsContinue to Step 9
9CHECK THE CORRECT OPERATION OF THE LEVERAll OKProblems metOperation
Check the operation of the lever (remembering that neutral can be engaged with the vehicle moving at speeds below 40 km/h)End of diagnosisThe lever is not working properlyCheck the state of the connections and the wiring. Repair/replace the part that is not workingContinue to Step 10
10AFTER THE CHECK ON THE CORRECT OPERATION OF THE LEVERAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'