Mitsubishi Outlander (2003+). Manual — part 203
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-107
INSPECTION PROCEDURE 7: Shift shock when shifting from N to D and long delay
COMMENTS ON TROUBLE SYMPTOM
If abnormal shock or delay of two seconds or more
occurs when the selector lever is shifted from N to D
range while the engine is idling, the cause is
probably abnormal underdrive clutch pressure or a
malfunction of the underdrive clutch, valve body or
throttle position sensor.
Possible causes
•
Malfunction of underdrive solenoid valve
•
Malfunction of input shaft speed sensor
•
Abnormal underdrive clutch pressure
•
Malfunction of throttle position sensor
•
Malfunction of the underdrive clutch
•
Malfunction of valve body
•
Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. MUT-II/III actuator test
Item 02: Underdrive solenoid valve
OK: Operating sound can be heard.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the underdrive solenoid valve.
STEP 2. MUT-II/III data list
Item 01: Input shaft speed sensor (Refer to data list
reference table
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to diagnosis code 22: Input shaft
speed sensor system
STEP 3. MUT-II/III data list
Item 32: Underdrive solenoid valve duty ratio.
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Replace the engine-A/T-ECU.
STEP 4. Check when shift shock occurs.
Q: Does the shift shock occur when the vehicle starts
moving?
YES :
Go to Step 6.
NO :
Go to Step 5.
STEP 5. Hydraulic pressure test
Measure the hydraulic pressure for underdrive clutch
when the selector lever is shifted from N to D range
(Refer to
OK: Refer to
.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Go to Step 8.
STEP 6. Check when shift shock occurs.
Q: Does the shift shock always occur?
YES :
Go to Step 8.
NO :
Go to Step 7.
STEP 7. MUT-II/III data list
Item 11: Throttle position sensor (Refer to data list
reference table
).
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Check the throttle position sensor system
(Refer to GROUP 13B, Troubleshooting
STEP 8. 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 :
Go to Step 9.
NO :
The inspection is complete.
STEP 9. Underdrive clutch 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 the underdrive clutch.
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-108
INSPECTION PROCEDURE 8: Shift shock when shifting from N to R and long delay
COMMENTS ON TROUBLE SYMPTOM
If abnormal shock or delay of two seconds or more
occurs when the selector lever is shifted from N to R
range while the engine is idling, the cause is
probably abnormal pressure in reverse clutch and
low-reverse clutch or a malfunction of the reverse
clutch, low-reverse brake, valve body or throttle
position sensor.
POSSIBLE CAUSES
•
Malfunction of low-reverse solenoid valve
•
Malfunction of input shaft speed sensor
•
Malfunction of the inhibitor switch
•
Abnormal reverse clutch pressure
•
Abnormal low-reverse brake pressure
•
Malfunction of throttle position sensor
•
Malfunction of the reverse clutch
•
Malfunction of low-reverse brake
•
Malfunction of valve body
•
Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. MUT-II/III actuator test
Item 01: Low-reverse solenoid valve
OK: Operating sound can be heard.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the low-reverse solenoid valve.
STEP 2. MUT-II/III data list
Item 22: Input shaft speed sensor (Refer to data list
reference table
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Refer to diagnosis code 22: Input shaft
speed sensor system
STEP 3. MUT-II/III diagnosis code
Either of diagnosis codes 27 or 28 is set, inhibtor
switch is defective.
Q: Are diagnosis codes 27 or 28 output?
YES <diagnosis code 27 is set> :
Refer to
diagnosis code 27: Inhibitor switch system
YES <diagnosis code 28 is set> :
Refer to
diagnosis code 28: Inhibitor switch system
NO :
Go to Step 4.
STEP 4. MUT-II/III data list
Item 31: Low-reverse solenoid valve duty ratio (Refer
to data list reference table
).
Q: Is the check result normal?
YES :
Go to Step 5.
NO :
Replace the engine-A/T-ECU.
STEP 5. Check when shift shock occurs.
Q: Does the shift shock occur when the vehicle starts
moving?
YES :
Go to Step 7.
NO :
Go to Step 6.
STEP 6. Hydraulic pressure test
Measure the hydraulic pressure for reverse clutch
and low-reverse clutch when the selector lever is
shifted from N to R range (Refer to
OK: Refer to
.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Go to Step 9.
STEP 7. Check when shift shock occurs.
Q: Does the shift shock always occur?
YES :
Go to Step 9.
NO :
Go to Step 8.
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-109
STEP 8. MUT-II/III data list
Item 11: Throttle position sensor (Refer to data list
reference table
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Check the throttle position sensor system
(Refer to GROUP 13B, Troubleshooting
STEP 9. 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 :
Go to Step 10.
NO :
The inspection is complete.
STEP 10. Reverse clutch and low-reverse 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 the reverse clutch and
low-reverse brake.
INSPECTION PROCEDURE 9: Shift shock when shifting from N to D, N to R and long delay
COMMENTS ON TROUBLE SYMPTOM
If abnormal shock or delay of two seconds or more
occurs when the selector lever is shifted from N to D
range and from N to R range while the engine is
idling, the cause is probably abnormal line pressure
or a malfunction of the oil pump, valve body.
Possible causes
•
Abnormal line pressure
•
Malfunction of throttle position sensor
•
Malfunction of oil pump
•
Malfunction of valve body
•
Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. Hydraulic pressure test
Measure the hydraulic pressure of each element
when the selector lever is in L, 2nd or reverse (Refer
to
OK: Refer to
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Go to Step 2.
STEP 2. Line pressure adjustment
(1) Adjust the line pressure (Refer to
(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 3.
NO :
The inspection is complete.
STEP 3. Check when shift shock occurs.
Q: Does the shift shock occur when the vehicle starts
moving?
YES :
Go to Step 4.
NO :
Replace the oil pump assembly (Oil pump
cannot be repaired).
STEP 4. Check when shift shock occurs.
Q: Does the shift shock always occur?
YES :
Go to Step 7.
NO :
Go to Step 5.
TROUBLESHOOTING <A/T>
AUTOMATIC TRANSMISSION (FF)
23A-110
STEP 5. MUT-II/III data list
Item 11: Throttle position sensor (Refer to data list
reference table
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Check the throttle position sensor system
(Refer to GROUP 13B, Troubleshooting
STEP 6. 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 7.
NO :
The inspection is complete.
STEP 7. 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.
INSPECTION PROCEDURE 10: Shift shock and slipping
COMMENTS ON TROUBLE SYMPTOM
If shift shock when driving are due to upshifting or
downshifting and the transmission speed become
higher than the engine speed, the cause is probably
abnormal line pressure or a malfunction of a solenoid
valve, oil pump, valve body or of a brake or clutch.
Possible causes
•
Malfunction of each solenoid valve
•
Abnormal line pressure
•
Malfunction of valve body
•
Malfunction of oil pump
•
Malfunction of each brake or each clutch
•
Malfunction of the engine-A/T-ECU
DIAGNOSIS
STEP 1. MUT-II/III actuator test
•
Item 01: Low-reverse solenoid valve
•
Item 02: Underdrive solenoid valve
•
Item 03: Second solenoid valve
•
Item 04: Overdrive solenoid valve
OK: Operating sound can be heard.
Q: Is the check result normal?
YES :
Go to Step 2.
NO :
Replace the defective solenoid valve.
STEP 2. MUT-II/III data list
•
Item 63: Shift position (Refer to data list reference
table
•
Item 31, 32, 33, 34: Each solenoid valve duty
ratio (Refer to data list reference table
).
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Replace the engine-A/T-ECU.
STEP 3. Hydraulic pressure test
Check all hydraulic pressures within the standard
value.
OK: Refer to
.
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 4.
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