Mitsubishi L200. Manual - part 290
TROUBLESHOOTING
AUTOMATIC TRANSMISSION
23A-67
(3) Check the diagnosis code.
Q: Is the diagnosis code set?
YES :
Go to Step 7.
NO :
The inspection is complete.
STEP 7. Check the A/T internal clutch and brake,
and then recheck the diagnosis code.
(1) Check the following clutches or brakes according
to the output diagnosis codes, replace if
necessary.
• If diagnosis code P1779, P1780, P1781,
P1782 are set individually or in a group,
replace the underdrive clutch.
• If diagnosis code P1781, P1782, P1783 are
set individually or in a group, replace the over-
drive clutch.
• If diagnosis code P1784 is set, replace the
reverse clutch.
• If diagnosis code P1779, P1784 are set indi-
vidually or in a group, replace the low-reverse
brake.
• If diagnosis code P1780, P1783 are set indi-
vidually or in a group, replace the second
brake.
• If diagnosis code P1782, P1783 are set indi-
vidually or in a group, replace the direct
clutch.
• If diagnosis code P1779, P1780, P1781,
P1784 are set individually or in a group,
replace the reduction brake.
• If diagnosis code P1779 is set, replace the
one-way clutch (OWC-L).
• If diagnosis code P1779, P1780, P1781 are
set individually or in a group, replace the one-
way clutch (OWC-D).
(2) Test drive the vehicle.
(3) Check the diagnosis code.
Q: Is the diagnosis code set?
YES :
Eliminate the cause of the noise.
NO :
The inspection is complete.
Code No.P1786 Damper clutch system (stuck off)
OPERATION
The A/T-ECU engages and disengages the damper
clutch (incorporated in the torque converter) by oper-
ating the DCC solenoid valve in response to driving
conditions.
DIAGNOSIS CODE SET CONDITIONS
If the damper clutch solenoid valve drive duty ratio is
100% for a continuous period of 4 seconds or more
when the damper clutch starts operating, diagnosis
code No.P1786 is output.
PROBABLE CAUSES
• Malfunction of input shaft speed sensor
• Damaged harness wires and connectors
• Malfunction of the A/T-ECU
• Malfunction of damper clutch solenoid valve
• Malfunction of valve body assembly
• Malfunction of torque converter
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
If diagnosis code P1786 is output, the input shaft
speed sensor may be defective.
Q: Is diagnosis code P1766 (P0715) set?
YES :
Refer to diagnosis code P1766 (P0715):
Input shaft speed sensor system
NO :
Go to Step 2.
STEP 2. M.U.T.-III diagnosis code
If diagnosis code P1786 is output, the damper clutch
solenoid valve may be defective.
Q: Is diagnosis code P1778 (P0740) set?