Mitsubishi Outlander (2003+). Manual - part 204

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-111

STEP 4. Line pressure adjustment

(1) Adjust the line pressure (Refer to 

P.23A-158

).

(2) Test drive the vehicle.
(3) Verify that the condition described by the 

customer exists.

Q: Does a malfunction take place again?

YES : 

Go to Step 5.

NO : 

The inspection is complete.

STEP 5. Valve body disassembly clean and 
assembly
(1) Check the bolts for looseness and the O-ring, 

solenoid valve and valve body for damage.
Replace the valve body assembly if the damages 
are thought to be irreparable.

(2) Test drive the vehicle.

(3) Verify that the condition described by the 

customer exists.

Q: Does a malfunction take place again?

YES : 

Check the oil pump for incorrect installation, 

damage and etc., and replace the oil pump 
assembly if necessary (The oil pump cannot 
be disassembled).

NO : 

The inspection is complete.

STEP 6. Each clutch and brake check

Check the facing for seizure and the piston seal ring 
for damage and interference with the retainer.

Q: Is the check result normal?

YES : 

The inspection is complete.

NO : 

Repair or replace each clutch and brake.

INSPECTION PROCEDURE 11: Does not shift properly (all points)

COMMENTS ON TROUBLE SYMPTOM
If all shift points are early or late while driving, the 
cause is probably a malfunction of the output shaft 
speed sensor, throttle position sensor, or 
engine-A/T-ECU.

Possible causes

•

Malfunction of output shaft speed sensor

•

Malfunction of throttle position sensor

•

Malfunction of the engine-A/T-ECU

DIAGNOSIS

STEP 1. MUT-II/III data list

Item 02: Output shaft speed sensor (Refer to data list 
reference table 

P.23A-133

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Refer to diagnosis code 23: Output shaft 
speed sensor system 

P.23A-37

.

STEP 2. MUT-II/III data list

Item 11: Throttle position sensor (Refer to data list 
reference table 

P.23A-133

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check the throttle position sensor system 
(Refer to GROUP 13B, Troubleshooting 

P.13B-20

).

STEP 3. MUT-II/III actuator test
(1) Item 14: INVECS-II cancel command
(2) Test drive the vehicle (Refer to Road Test, 

Inspection procedure 8 

P.23A-9

).

(3) Check that the gear shifting corresponds to the 

standard shift line of the shift pattern diagram.

Q: Is the check result normal?

YES : 

The inspection is complete.

NO : 

Replace the engine-A/T-ECU.

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-112

INSPECTION PROCEDURE 12: Does not shift properly (some point)

COMMENTS ON TROUBLE SYMPTOM
If some of the shift points are early or late when 
driving, the cause is probably a malfunction of valve 
body, or it is due to the characteristics of the 
INVECS-II system but is not an abnormality.

Possible causes

•

Malfunction of valve body

•

Malfunction of the engine-A/T-ECU

DIAGNOSIS

STEP 1. Check when the shift points early or late.

Q: Are the shift points early or late only when A/T fluid 

is 

−

20

°

C or less, or 125

°

C or more?

YES : 

The symptom is due to characteristics of the 

INVECS-II system, but is not abnormal.

NO : 

Go to Step 2.

STEP 2. MUT-II/III actuator test
(1) Item 14: INVECS-II cancel command
(2) Test drive the vehicle (Refer to Road Test, 

Inspection procedure 8 

P.23A-9

).

(3) Check that the gear shifting corresponds to the 

standard shift line of the shift pattern diagram.

Q: Is the check result normal?

YES : 

The inspection is complete.

NO : 

Replace the engine-A/T-ECU.

INSPECTION PROCEDURE 13: Does not shift (no diagnosis code)

COMMENTS ON TROUBLE SYMPTOM
The gear shifting does not occur while driving. If no 
diagnosis codes are set, the cause is probably a 
malfunction of the shift switch assembly or 
engine-A/T-ECU .

POSSIBLE CAUSES

•

Malfunction of Shift switch assembly

•

Malfunction of the engine-A/T-ECU

DIAGNOSIS

STEP 1. MUT-II/III data list

Item 54: A/T control relay (Refer to Data List 
Reference Table 

P.23A-133

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the engine-A/T-ECU.

STEP 2. MUT-II/III data list

Item 67: Select switch (Refer to Data List Reference 
Table 

P.23A-133

).

Q: Is the check result normal?

YES : 

Replace the engine-A/T-ECU.

NO : 

INSPECTION PROCEDURE 16: Shift 
switch assembly system check (Refer to 

P.23A-114

).

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-113

INSPECTION PROCEDURE 14: Poor acceleration

COMMENTS ON TROUBLE SYMPTOM
If acceleration is poor when downshifting occurs 
while driving, the cause is probably a malfunction of 
the engine system.

Possible causes

•

Malfunction of engine system

•

Malfunction of the engine-A/T-ECU

DIAGNOSIS

STEP 1. Engine system check

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the engine system.

STEP 2. Engine-A/T-ECU replacement
(1) Replace the engine-A/T-ECU.
(2) Test drive the vehicle.
(3) Verify that the condition described by the 

customer exists.

Q: Does a malfunction take place again?

YES : 

Go to Step 1.

NO : 

The inspection is complete.

INSPECTION PROCEDURE 15: Vibration

COMMENTS ON TROUBLE SYMPTOM
If vibration occurs when driving at constant speed or 
when acceleration in high range, the cause is 
probably an abnormal torque converter pressure, or 
a malfunction of the engine system, damper clutch 
solenoid valve, valve body or torque converter.

Possible causes

•

Malfunction of damper clutch solenoid valve

•

Malfunction of engine system

•

Abnormal torque converter pressure

•

Malfunction of valve body

•

Malfunction of torque converter

•

Malfunction of the engine-A/T-ECU

DIAGNOSIS

STEP 1. Check when the vibration occurs.

Q: Does the vibration occur when the damper clutch 

is operating?

YES : 

Go to Step 3.

NO : 

Go to Step 2.

STEP 2. Engine system check

Q: Is the check result normal?

YES : 

The inspection is complete.

NO : 

Repair the engine system.

STEP 3. Engine-A/T-ECU replacement
(1) Replace the engine-A/T-ECU.
(2) Test drive the vehicle.
(3) Verify that the condition described by the 

customer exists.

Q: Does a malfunction take place again?

YES : 

Go to Step 4.

NO : 

The inspection is complete.

STEP 4. Torque converter check

Check for damaged drive plate, incorrect installation 
in the input shaft (inserted at an angle), damaged 
splines or damper clutch sealing.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

If repair is possible, repair the damaged 
part. If repair is not possible because the 
splines on the drive plate or torque 
converter are damaged, replace it.

STEP 5. Valve body disassembly clean and 
assembly

Check the bolts for looseness and the O-ring, 
solenoid valve and valve body for damage.

Q: Is the check result normal?

YES : 

The inspection is complete.

NO : 

Replace the valve body assembly if the 
damages are thought to be irreparable.

TROUBLESHOOTING <A/T>

AUTOMATIC TRANSMISSION (FF)

23A-114

INSPECTION PROCEDURE 16: Shift switch assembly system

ENGINE-
A/T-ECU

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Gray     R : Red     P : Pink     V : Violet   

SHIFT
SWITCH
ASSEMBLY

SHIFT
SWITCH

SELECT
SWITCH

COMBINATION
METER

INHIBITOR
SWITCH

IGNITION
SWITCH (IG1)

AC309573AB

Shift switch system circuit <RHD>