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