Mitsubishi Pajero Pinin 1999 Workshop Manual page 313

AUTOMATIC TRANSMISSION ±
INSPECTION PROCEDURE 8
Upshifting occurs spontaneously
Upshifting occurs in ranges where upshifting should not occur, e. g. upshifting to
2nd gear in L range, 3rd gear in 2 range or 4th gear in D range when overdrive
is disconnected.
MUT- II SERVICE DATA
37 ± Inhibitor switch
OK: MUT- II display and selector
lever position should match
OK
MUT- II SERVICE DATA
35 ± Overdrive switch
OK: MUT- II display and mode
selected should match
OK
Replace the A/T-ECU.
INSPECTION PROCEDURE 9
Incorrect drive gear position
Vehicle starts off in 2nd, 3rd or 4th gear when in D range. Often occurs when starting
off is not smooth.
L : Refer to the Transmission Workshop Manual.
MUT- II SERVICE DATA
37 ± Inhibitor switch
OK: MUT- II display and selector
lever position should match
OK
Does the vehicle move forward in 2nd
gear?
No
Does the vehicle move forward in 3rd
gear? (D range)
No
Does the vehicle move forward in 3rd
gear? (2, L range)
No
Does the vehicle move forward in 4th
gear?
No
Check the forward clutch. L
NG
Inspection Procedure 14 ± Inhibitor
switch system (Refer to P. 23-25.)
NG
Inspection Procedure 15 ± Overdrive
switch system (Refer to P. 23-25.)
NG
Inspection Procedure 14 ± Inhibitor
switch system (Refer to P. 23-25.)
Yes
Inspection Procedure 6 ± Downshifting
does not occur (Refer to P. 23-20.)
Yes
Does the vehicle reverse in R range?
Check the planetary gear. L
Yes
Malfunction of 2±3 shift valve L
Malfunction of solenoid valve No. 1 L
Yes
Does the vehicle reverse in R range?
Malfunction of 2±3 shift valve L
Troubleshooting <A/T>
Probable cause
Malfunction of inhibitor switch
Malfunction of overdrive switch
Malfunction of A/T-ECU
Probable cause
Malfunction of inhibitor switch
Malfunction of direct clutch
Malfunction of planetary gear
Malfunction of valve body
Malfunction of forward clutch
Malfunction of solenoid valve No. 1
Malfunction of A/T-ECU
Yes
No
Yes
No
23-21
Check the direct clutch. L
Malfunction of solenoid valve No.
1 L
Check the trouble symptoms.
NG
Replace the A/T-ECU.