Mitsubishi Evolution X. Manual - part 452

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-265

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Voltage of battery: 8 V or more.

• Voltage of battery: 16.5 V or less.

JUDGMENT CRITERIA

• Fluid temperature change while 80 millisecond: 

10

° C (18° F) or more, or fluid temperature 

change while 80 millisecond: 

−10° C (−18° F) or 

more. (400 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The absolute value of the temperature rise or drop at 
every 80 milliseconds remains 10

° C (18° F) or less 

for 400 milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

AC710592

START

No

Fluid temperature change
while 80 msec > 10 ˚C (18 ˚F)

Yes

Yes

No

Good

Malfunction

END

Monitoring condition met

No

Continuous failure
for 400 msec

Yes

No

Fluid temperature change
while 80 msec > -10 ˚C (-18 ˚F)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-266

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C 

− 

Troubleshooting 

P.54C-14

.) After repairing the CAN 

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2741 set?

YES : Replace the TC-SST assembly. (Refer to 

P.22C-341

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DTC P2742: Fluid Temperature Sensor System (Output low range out)

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnostic trouble code may be 
set. Prior to this diagnosis, diagnose the CAN 
bus lines.

• Whenever the ECU is replaced, ensure that 

the CAN bus lines are normal.

.

DIAGNOSTIC FUNCTION

TC-SST-ECU checks that the output of the fluid tem-
perature sensor is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The output is determined to be too low.

.

MONITOR EXECUTION

• Continuous

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• P2741: Fluid temperature sensor system (Gradi-

ent error)

• P2743: Fluid temperature sensor system (Output 

high range out)

• P1808: TC-SST-ECU temperature, fluid tempera-

ture sensor system (Correlation error)

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-267

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Voltage of battery: 8 V or more.

• Voltage of battery: 16.5 V or less.

JUDGMENT CRITERIA

• Fluid temperature: −50° C (−58° F) or less. (400 

millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The fluid temperature remains 

−50° C (−58° F) or more 

for 400 milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Repair the CAN bus lines. (Refer to GROUP 54C 

− 

Troubleshooting 

P.54C-14

.) After repairing the CAN 

bus line, go to Step 2.

AC710593

START

No

Yes

Yes

Good

Malfunction

END

Monitoring condition met

No

Continuous failure
for 400 msec

No

Fluid temperature < -50 ˚C (-58 ˚F)

Yes

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-268

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2742 set?

YES : Replace the TC-SST assembly. (Refer to 

P.22C-341

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DTC P2743: Fluid Temperature Sensor System (Output high range out)

CAUTION

• If there is any problem in the CAN bus lines, 

an incorrect diagnostic trouble code may be 
set. Prior to this diagnosis, diagnose the CAN 
bus lines.

• Whenever the ECU is replaced, ensure that 

the CAN bus lines are normal.

.

DIAGNOSTIC FUNCTION

TC-SST-ECU checks that the output of the fluid tem-
perature sensor is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The output is determined to be too high.

.

MONITOR EXECUTION

• Continuous

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• P2741: Fluid temperature sensor system (Gradi-

ent error)

• P2742: Fluid temperature sensor system (Output 

low range out)

• P1808: TC-SST-ECU temperature, fluid tempera-

ture sensor system (Correlation error)

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.