Mitsubishi Outlander GS45X. Manual — part 1691

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-69

LOGIC FLOW CHARTS (Monitor Sequence) <P0741>

.

DTC SET CONDITIONS <P0741>

Check Conditions

• Lock-up status: engaging.

• Transmission range switch: D

Judgement Criteria

• Calculated slip (engine speed - input shaft

speed): (40 + 0.035

× output shaft speed>)/2 or

more. (30 seconds)

.

OBD-II DRIVE CYCLE PATTERN <P0741>

Driving at 55 km/h (34.2 mph) or more with the shift
ranges of 3rd, 4th, 5th, and 6th gear. Maintain each
shift range for 30 second or more.

.

DESCRIPTIONS OF MONITOR METHODS
<P0742>

• When the input shaft speed sensor and the out-

put shaft speed sensor are normal at the "D"
range, the engine speed signal is normal, and
within the non-lock-up operation range, the
extremely low slip speed of the torque converter
is detected continuously for a specified time.
(P0742)

.

MONITOR EXECUTION <P0742>

• Transmission range: D range driving with the

lock-up activated

.

MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
<P0742>

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

Yes

Yes

Yes

START

Ne: Engine speed (r/min)
N

ISS

: Input shaft speed (r/min)

N

OSS

: Output shaft speed (r/min)

Good

END

No

No

No

Malfunction

AC802668

Lockup engaged

Ne - N

ISS

(40 + 0.035 N

OSS

) / 2

Continuous failure for 30 secs.

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-70

LOGIC FLOW CHARTS (Monitor Sequence) <P0742>

.

DTC SET CONDITIONS <P0742>

Check Conditions

• Output speed: more than 1,000 r/min.

• Lock-up status: disengaging.

• Transmission range switch position: D.

Judgement Criteria

• Calculated slip (engine speed - input shaft

speed): 5 r/min or less. (5 seconds)

.

OBD-II DRIVE CYCLE PATTERN <P0742>

Driving at 55 km/h (34.2 mph) or less with the shift
range of 3rd and 4th gear. Driving at 48

± 2 km/h

(29.8

± 1.2 mph) with the 5th gear. Maintain each

shift range for 1 second or more.

.

END

No

No

No

No

No

No

Malfunction

AC802669

Yes

Yes

Yes

Yes

Yes

Yes

START

N

OSS

: Output shaft speed (r/min)

Ne: Engine speed (r/min)
N

ISS

: Input shaft speed (r/min)

Timer start

Lockup engaged

N

OSS

1000 r/min

Timer 5 sec

Transmission range is D

Continuous failure for 5 secs.

Ne - N

ISS

5 r/min

Good

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-71

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CODE TO BE
SET ARE:)

• Malfunction of the P0743: lock-up and

low-reverse brake linear solenoid valve system
circuit

• Malfunction of the P0712: transmission fluid tem-

perature sensor system (short circuit)

• Malfunction of the P0713: transmission fluid tem-

perature sensor system (open circuit)

• Poor installation of the engine and A/T (deviation

to the axial direction)

• Malfunction of the torque converter

• Malfunction of the valve body assembly

DIAGNOSIS

STEP 1. Hydraulic pressure test
Refer to

P.23C-26

.

Q: Is the check result normal?

YES : Go to Step 2.
NO : Repair or replace the failure section.

STEP 2. Check the lock-up and low-reverse brake linear
solenoid.
Check for P0743 (lock-up and low-reverse brake linear sole-
noid). Refer to

P.23C-72

.

Q: Is the check result normal?

YES : Go to Step 3.
NO : Repair or replace the failure section.

STEP 3. Check the transmission fluid temperature sensor,
input shaft speed sensor, and output shaft speed sensor.
Check the following DTCs: P0712 (transmission fluid tempera-
ture sensor (short circuit)), P0713 (transmission fluid tempera-
ture sensor (open circuit)), P0715 (input shaft speed sensor)
and P0720 (output shaft speed sensor).
Refer to

P.23C-39

<P0712>,

P.23C-43

<P0713>,

P.23C-46

<P0715>,

P.23C-51

<P0720>.

Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair or replace the failure section.

STEP 4. Check the malfunction of CAN communication
system.
Q: Are the DTC for CAN communication system

malfunction (U0001, U0100, U0141, P1705, P1706) set?
YES : Repair or replace the failure section.
NO : Go to Step 5.

STEP 5. Check the TCM connector pin terminal and the
connection status.
Q: Is the check result normal?

YES : Replace the TCM, and then go to Step 6.
NO : Repair or replace the failure section.

AUTOMATIC TRANSAXLE DIAGNOSIS <A/T>

TSB Revision

AUTOMATIC TRANSAXLE

23C-72

STEP 6. 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 : Go to Step 7.

STEP 7. Check the installation position of the engine and
A/T.
Q: Is the check result normal?

YES : Replace the transaxle assembly.
NO : Repair or replace the failure section.

DTC P0743: Lock-up and Low-reverse Brake Linear Solenoid Valve System

TRANSMISSION
CONTROL
MODULE

LOCK-UP &
LOW-
REVERSE
BRAKE
LINEAR
SOLENOID
VALVE

LOW
CLUTCH
LINEAR
SOLENOID
VALVE

LINE
PRESSURE
LINEAR
SOLENOID
VALVE

LOW-
REVERSE
BRAKE
SHIFT
SOLENOID
VALVE

2-6
BRAKE
LINEAR
SOLENOID
VALVE

3-5
REVERSE
CLUTCH
LINEAR
SOLENOID
VALVE

HIGH
CLUTCH
LINEAR
SOLENOID
VALVE

LOW
CLUTCH
SHIFT
SOLENOID
VALVE

A/T
CONTROL
SOLENOID
VALVE
ASSEMBLY

AC902549

Solenoid valve system circuit