Mitsubishi Outlander GS45X. Manual — part 1689
AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>
TSB Revision
AUTOMATIC TRANSAXLE
23C-61
STEP 2. Check the DTC.
Check that the DTC other than P0729, P0732, P0733, P0734,
P0735 (6th, 2nd, 3rd, 4th, 5th gear ratio) is set.
Q: Is the DTC set?
YES : Check and repair the relevant DTC system.
NO : Go to Step 3.
STEP 3. Check the transmission fluid properties.
Check the status of the transmission fluid properties (smell,
color, fouling).
• Black: A/T inside damage, seizure
• Milky: Water intrusion
Q: Is the check result normal?
YES : Go to Step 4.
NO : Remove the A/T from the vehicle, then check and
repair the inside.
STEP 4. Check the transmission fluid level.
Q: Is the check result normal?
YES : Adjust the transmission fluid level, and then go to
Step 5.
NO : Go to Step 5.
STEP 5. Check the signals of input shaft speed sensor and
output shaft speed sensor.
Check the signals of C-37 TCM connector terminal No. 37 and
No. 38.
Refer to
.
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair or replace the failure section.
STEP 6. Hydraulic pressure test
Refer to
.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Remove the A/T from the vehicle, then check and
repair the inside.
STEP 7. Erase the DTC code, and drive the vehicle for a
while.
Check that the normal code is displayed.
Q: Is the check result normal?
YES : The procedure is complete.
NO : Return to START.
AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>
TSB Revision
AUTOMATIC TRANSAXLE
23C-62
DTC P0731: 1st Gear Incorrect Ratio
.
DESCRIPTIONS OF MONITOR METHODS
• After 1st gear is achieved for 2 seconds, the
abnormal gear ratio
*1
is detected for 2 seconds
continuously, or the engine runup
*2
is detected
for 250 milliseconds.
*1
: The actual gear ratio deviates from the target gear
ratio to the low engine (turbine) speed.
*2
: The actual gear ratio deviates from the target gear
ratio to the high engine (turbine) speed.
.
MONITOR EXECUTION
• 1st gear driving
.
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P0846: Malfunction of the 2-6 brake pressure
switch system
• P0876: Malfunction of the High clutch pressure
switch system
• P0988: Malfunction of the Low-reverse brake
pressure switch system
Sensor (The sensor below is determined to be
normal)
• Input shaft speed sensor
• Output shaft speed sensor
• Transmission range switch
• Lock-up and low-reverse brake linear solenoid
• Low clutch linear solenoid
• 2-6 brake linear solenoid
• 3-5 reverse clutch linear solenoid
• High clutch linear solenoid
• Low clutch shift solenoid
• Low-reverse brake shift solenoid
• Engine revolution signal
• CAN communication
.
AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>
TSB Revision
AUTOMATIC TRANSAXLE
23C-63
LOGIC FLOW CHARTS (Monitor Sequence)
.
Good
END
Shift changing is finished
No
No
No
No
No
No
Actual gear ratio 4.978
Malfunction
Timer start
No
Timer 2 secs.
Malfunction
AC802665
Gear position is 1st
Actual gear ratio = 2nd to 4th gear ratio
Continuous failure for 2 sec
Continuous failure for 250 msec
Yes
Yes
Yes
Yes
Yes
Yes
Yes
START
AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>
TSB Revision
AUTOMATIC TRANSAXLE
23C-64
DTC SET CONDITIONS
Check Conditions
• Shift stage: 1st gear.
• Time after shift changing finish: 2 seconds or
more.
Judgement Criteria
• Gear ratio: 4.978 or more. (0.25 second)
• Gear ratio: 2.114 or more and 2.584 or less. (2
seconds)
• Gear ratio: 1.392 or more and 1.701 or less. (2
seconds)
• Gear ratio: 1.021 or more and 1.247 or less. (2
seconds)
.
OBD-II DRIVE CYCLE PATTERN
1st gear driving for 5 seconds or more
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)
• Transaxle assembly powertrain parts failure
• Malfunction of the P0715: input shaft speed sen-
sor system
• Malfunction of the P0720: output shaft speed
sensor system
• Malfunction of the P0748: line pressure linear
solenoid valve system circuit
• Malfunction of the P0753: low clutch linear sole-
noid valve system circuit
• Malfunction of the P1758: low-reverse brake shift
solenoid valve system circuit
• Malfunction of the low clutch
• Malfunction of the low one-way clutch
• Malfunction of the valve body assembly
DIAGNOSIS
STEP 1. Check the DTC.
Check that P0715 (input shaft speed sensor) and P0720 (out-
put shaft speed sensor) are set.
Q: Is the DTC set?
YES : Check and repair the relevant DTC system.
NO : Go to Step 2.
STEP 2. Check the DTC.
Check if the DTC other than P0731 (1st gear ratio) is set.
Q: Is the DTC set?
YES : Check and repair the relevant DTC system.
NO : Go to Step 3.
STEP 3. Check the transmission fluid properties.
Check the status of the transmission fluid properties (smell,
color, fouling).
• Black: A/T inside damage, seizure
• Milky: Water intrusion
Q: Is the check result normal?
YES : Go to Step 4.
NO : Remove the A/T from the vehicle, then check and
repair the inside.
STEP 4. Check the transmission fluid level.
Q: Is the check result normal?
YES : Go to Step 5.
NO : Adjust the transmission fluid level, and then go to
Step 5.
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