The car goes to idle on its own

Troubleshooting table Symptom/conditions: The car goes to idle on its own
DIAGNOSTICS
  • When changing gear with the car moving
 
Test results
Step Operations
0
Check oil level
All OK
Problems found
Intervention
 

Check oil level as shown in Procedure 2

 Go to step 1 Level other than max Do Procedure 3
1
Check oil pressure
All OK
Problems found
Intervention
 

Check oil pressure as shown in Procedure 4
(idle for low pressure is only obtained if the vehicle is stationary or moving at low speed (approx. 10 km/h). Under these conditions gearbox fault warning light flashes on models 156 or the text Selespeed Gearbox Fault is displayed on 147 without any fault being stored in the control unit)

 Go to step 2 Press < 40 bar Do Procedure 5
2
Check ECU errors
All OK
Problems found
Intervention
 

Check ECU for absence of errors. Specifically check for:

  • Clutch solenoid valve current error
  • Odd gears engagement ( Vbat short circuit)
  • Even gears engagement error (Vbat short circuit)
 Go to step 4 Presence of one or more errors included in the list Go to step 3
3
Check problems found
All OK
Problems found
Intervention
  Check problems according to Procedure 17 Vai a step 4 The problem persists Go to step 4
4
Engagement of all gears check
All OK
Problems found
Intervention
 

Check correct engagement of all the gears following Procedure 11

 Vai a step 5 The problem persists Contact technical assistance for additional information on the problem
5
Check that the problem is no longer present.
All OK
Problems found
Intervention
  Fault no longer present End of procedure