Jan 312018
 

Symptom/conditions: Noisy Gearbox

  • The gear grates
Step Operations Test
results
0 Check that the clutch does not drag All OK Problems found Intervention
Check that the clutch does not drag following

P14 – Clutch drag check
Go to
step 2
The clutch drags Overhaul the clutch/flywheel kit and replace and broken components. Go to step 1.
1 After intervening on the clutch kit All OK Problems found Intervention
Check that the problem is no longer present. End of
precedure
The
problem persists
Go to step 2.
2 The
problem persists
All OK Problems found Intervention
The
problem persists
Contact technical assistance for additional information on the problem
 Posted by at 7:46 pm
Jan 312018
 

Symptom/conditions: The car jerks

  • It jerks from a standing start
  • It jerks when changing gear

Preliminary check

If there are other system faults on the vehicle (instrument panel warning lights on referring to : engine control, ABS, VDC…) check the cause of these problems. If this is not the case, proceed with this chart.

Step Operations Test
results
0 Check
oil level
All OK Problems found Intervention
Check
oil level als shown in P2 – Oil level check
Go to
step 1
Level
other than max
Do
P3 – Oil leaks check
1 Check
oil pressure
All OK Problems found Intervention
Check
oil pressure als shown in
P4 – Oil pressure check
Go to
step 2
Press <
40 bar
Do

P5 – Electric pump operation check
2 Check
errors
All OK Problems found Intervention
Check ECU for absence of errors. Specifically check for:
* Clutch position sensor* Errors CAN messages (reception/transmission)
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

P17 – What to do according to the error on the Selespeed control unit
End of
procedure
The
problem persists
Go to
step 4
4 Bleed the system with Examiner All OK Problems found Intervention
In active diagnosis run two system bleeding cycles through the “clutch bleeding” command Go to
step 5
5 Clutch parameters calibration with Examiner All OK Problems found Intervention
With examiner in active diagnosis, run the calibration of the clutch parameters through ” enable clutch self-calibration “. Go to
step 6
6 Road
test
All OK Problems found Intervention
Check that the fault is no longer present by testing on the road End of
procedure
The
problem persists
Go to
step 6
7 The
problem persists
All OK Problems found Intervention
Check that the problem is not caused by other systems such as the engine, fuel supply ÖÖ. Go to
step 8
There are faults on other car systems. See the
specific charts
8 The
problem persists
All OK Problems found Intervention
Contact technical assistance for additional information on the problem

 

 Posted by at 7:38 pm
Feb 102015
 

The gearbox check control unit diagnosis, after ascertaining a fault takes action regarding the down-grade functioning. This data is indicated referring to the faulty component, in the table below:

FAULTY COMPONENT Fault warning light DOWN GRADING
Gear engagement solenoid valves (proportional) On Gear shift acceptance locked, gear engagement excluding idle (N) (vehicle stationary)
Gear selection solenoid valve (ON/OFF) On Gear shift acceptance locked, gear engagement excluding idle (vehicle stationary)
Engagement and selection position sensors On Long time for gear shift.
Rev sensors: engine, gear input and gear output (car speed) On Gear shift acceptance limited to 1, 2, R, N
Oil pressure sensor On Electric pump control in open-loop
Gear request lever switches On Switching in automatic mode “CITY”, cannot engage R
Buttons on steering wheel switches On Does not accept commands from steering wheel
Clutch solenoid valve (proportional) On Clutch control lock, automatic shift to idle (N) (vehicle stationary)
Clutch position sensor On Clutch control lock, automatic shift to idle (N) (vehicle stationary)
Pump relay control On Vehicle stationary
Buzzer control On Continual functioning
Start enable relay control On Gear shift acceptance limitation for 1, 2, R, N
Brake status switch On With engine off does not accept gear change, engine only starts with gear in idle (N)
Message transmission CAN line On C.C.M. does not check torque with city disabled
Message receiving CAN line On Gear shift acceptance limitation for 1, 2, R, N C.C.M. does not check torque
CFC 208F microprocessor On Gear shift acceptance limitation for 1, 2, R, N
Control unit CFC 208F earth On Total system lock
CFC 208F memory On Gear shift acceptance limitation for 1, 2, R, N
Display serial line control On Gear engaged not displayed
Accumulator discharged On No recovery
Pump relay glued On No recovery
Accelerator pedal On 1, 2, R, N engagement indication not valid and limitation of engine revs.
 Posted by at 8:57 pm
Feb 102015
 

The diagnostics implemented in the control unit CFC 208F allow the testing of the inputs:

  • rev sensor from rev counter module
  • clutch disk speed sensor (gearbox primary)
  • car speed from CAN line (through A.B.S.)

This consists in checking whether or not there is the signal.
The diagnostics on the analog input signals is made checking these type of failures:

  • signal out of electrical range
  • signal out of dynamic range

The diagnostics implemented on the output controls of the control unit CFC 208F concern:

  • the three proportional solenoid valves
  • the two on-off solenoid valves
  • the two relays (hydraulic pump and engine start enable)

The types of failures checked are:

For proportional solenoid valves:

  • short circuit to earth
  • short circuit to +Vbatt
  • circuit open

For ON/OFF solenoid valves:

  • short circuit to earth

Electric pump relay:

  • circuit open
  • short circuit to +Vbatt
  • Start-up enable relay
  • short circuit to earth
  • circuit open

These input signals and output commands are excluded from the diagnosis:

  • brake pedal (except permanent closed circuit for a certain time with car moving)
  • automatic mode (CITY) and door open switches
  • the signals supplied by C.C.M. on CAN network
  • diagnostics serial line (K)
  • signals :key (+15/54) power supply (+30) direct from battery.
 Posted by at 8:45 pm