Page 72 of 138
21B-72
MR-413-X44-21B000$472.mif
V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF257
PRESENT
OR
STOREDSLOW LOSS OF HYDRAULIC PRESSURE
1.DEF : Slow loss of pressure
NOTESSpecial note:
Fault warning light comes on.
Small internal leak: replace the hydraulic unit or clutch solenoid valve (see MR 411 Mechanical, 21B, Sequential
gearbox, Electro-hydraulic unit: Removal - Refitting).
Slow external leak: repair or replace the component concerned (see Replacement of components).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF257
Page 73 of 138
21B-73
MR-413-X44-21B000$472.mif
V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF258
PRESENT
OR
STOREDRAPID LOSS OF HYDRAULIC PRESSURE
1.DEF : Rapid loss of pressure
NOTESSpecial note:
Warning light comes on.
Small internal leak: replace the hydraulic unit or clutch solenoid valve (see MR 411 Mechanical, 21B, Sequential
gearbox, Electro-hydraulic unit: Removal - Refitting).
Slow external leak: repair or replace the component concerned (see Replacement of components).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF258
Page 74 of 138
21B-74
MR-413-X44-21B000$472.mif
V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF259
PRESENT
OR
STOREDPRESSURE ACCUMULATOR
1.DEF : Pressure accumulator fault
NOTESConditions for applying the fault finding procedure to stored faults:
The fault is declared present after low nitrogen pressure has been recorded at least
40 times.
Special note:
–Fault warning light comes on when low nitrogen pressure has been recorded at
least 40 times.
–Engine stalls when the vehicle is slowing down.
–Gear change impossible when driving.
Replace the accumulator (see MR 411 Mechanical, 21B, Sequential gearbox, Pressure accumulator:
Removal - Refitting).
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF259
Page 75 of 138
21B-75
MR-413-X44-21B000$472.mif
V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No: 04
21B
DF262
PRESENT
OR
STOREDAUTO-ADAPTIVE PATTERN
1.DEF : Configuration/Initialisation
NOTESSpecial note:
–Fault warning light comes on.
–Automatic mode deactivated.
Carry out fault finding on the injection (see 17B, Petrol injection).
If there are no injection faults, this fault is only due to pulling away with significant skidding on a slippery road
followed by recovery of tyre grip.
Clear this fault using command RZ001 "Stored fault(s)".
AFTER REPAIRDeal with any faults detected by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF262
Page 125 of 138
21B -125
MR-413-X44-21B000$885.mif
V2
Vdiag No: 04SEQUENTIAL GEARBOX
Fault finding - Interpretation of commands21B
SEQUENTIAL GEARBOX FAULTS NOT IMMOBILISING
THE VEHICLE
CANNOT ACCESS AUTOMATIC MODE IF SEMI-AUTOMATIC MODE WAS
PREVIOUSLY SELECTEDALP 4
CANNOT ACCESS SEMIAUTOMATIC MODE IF AUTOMATIC MODE WAS
PREVIOUSLY SELECTEDALP 4
SWITCHING TO AUTOMATIC MODE POSSIBLE IF RESTARTING ENGINE ALP 4
NO REVERSING LIGHT ALP 5
NO CREEPING ALP 6
BRAKE LIGHTS PERMANENTLY LIT ALP 6
FORWARD OR REVERSE GEAR CAN BE SELECTED WITHOUT DEPRESSING
THE BRAKE PEDALALP 6
LOSS OF AUTOMATIC MODE ALP 7
VEHICLE DOES NOT MOVE FORWARD WITH GEAR ENGAGED AND ENGINE
RUNNINGALP 8
INADEQUATE REACTION TO FULL LOAD REQUEST ALP 9
LOSS OF DISPLAY WHEN DRIVING ALP 10
DISPLAY AND WARNING BUZZER FUNCTION ERRATICALLY ALP 11
VEHICLE JUMPS WHEN ENGINE IS STARTED ALP 12
Page 137 of 138

21B -137
MR-413-X44-21B000$944.mif
V2
SEQUENTIAL GEARBOX
Diagnostic - Fault finding chart
Vdiag No: 04
21B
ALP 11 Display and warning buzzer operation erratically
NOTESSpecial notes:
Only consult this customer complaint after a complete check with the diagnostic tool.
–The buzzer is active:
–when the front doors are opened,
–if the clutch overheats while the vehicle is being driven,
–if the sequential gearbox programming has not been carried out.
–The depress brake pedal symbol is active:
–when the engine is stopped by a gear lever request or if the lever is accidentally shifted to the neutral
position while the vehicle is being driven.
Carry out a road test to recreate the customer complaint.
Carry out the following programming:
–VP008 “Program selection/engagement ranges”.
–Program the biting point using command:
RZ003 Clutch biting point programming
Exit fault finding mode and switch off the ignition.
Wait 1 minute and then re-establish dialogue with the computer.
Shift the gear lever to rest position (Stb).
Start the engine.
Wait 10 seconds without changing gear (for programming the clutch biting point).
Check that programming has been successfully completed by referring to the following status:
ET062 “Biting point programming” displays “Done”.
Repeat the procedure if unsuccessful.
AFTER REPAIRClear the computer fault memory. Switch off the ignition and wait 20 seconds.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_ALP11