21B-43
MR-413-X44-21B000$413.mif
V2
SEQUENTIAL GEARBOX
Fault finding - Interpretation of faults
Vdiag No.: 04
21B
DF077
PRESENT
OR
STOREDGEARBOX CONTROL
1.DEF: Impossible to engage or disengage a gear
NOTESPriorities when dealing with a number of faults:
If DF069 Selection position sensor circuit and/or DF070 Engagement position
sensor circuit is stored, deal with them first.
Special notes:
Fault warning light comes on.
Improper use of lever when the vehicle is stationary may lead to this fault.
Check that the selector lever is correctly clipped onto the hydraulic unit by looking through the inspection flap
(see MR 411 Mechanical, 21B, Sequential gearbox).
Check if the water in the gearbox oil is due to condensation.
Replace the oil if necessary (see MR 411 Mechanical, 21B, Sequential gearbox, Electric pump assembly oil:
Specifications).
If it is difficult to select gears, especially reverse gear, apply the interpretation of PR018 Hydraulic pressure.
Clear the computer fault memory.
Carry out the programming procedure for the Hydraulic unit - gearbox kit (without clutch) or Clutch or
gearbox + Clutch (see Replacement of components).
If the fault is still present, this means there is an internal mechanical fault with the gearbox, contact Techline.
AFTER REPAIRDeal with any faults displayed by the diagnostic tool.
Clear the computer memory.
Carry out a road test followed by another check with the diagnostic tool.
BVRJH1_V04_DF077
