Mitsubishi Evolution X. Manual - part 411

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-101

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P181E 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 P181F: Clutch 2 (Pressure 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 clutch 2 pressure is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The pressure of the clutch 2 is 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)

• P0846: Clutch 2 pressure sensor system (Poor 

performance)

• P0847: Clutch 2 pressure sensor system (Output 

low range out)

• P0848: Clutch 2 pressure sensor system (Output 

high range out)

• P1844: Shift fork 3 malfunction

• P184B: Shift fork 4 malfunction

Sensor (The sensor below is determined to be 

normal)

• Clutch 2 pressure sensor

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-102

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Target clutch 2 (even) pressure: 3,000 mbar or more>

.

DTC SET CONDITIONS <TARGET 
CLUTCH 2 (EVEN) PRESSURE: 3,000 
MBAR OR MORE>

Check Conditions

• Engine speed: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

• Clutch 2 (even) state: Slip or engaged.

• Target clutch 2 (even) pressure: 3,000 mbar or 

more.

JUDGMENT CRITERIA

• Calculated pressure: −5,000 mbar or less. (220 

millisecond)

.

OBD-II DRIVE CYCLE PATTERN <TARGET 
CLUTCH 2 (EVEN) PRESSURE: 3,000 
MBAR OR MORE>

The calculated pressure remains 

−5,000 mbar or 

more for 220 milliseconds.

.

AC710672

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 220 msec

No

Yes

Yes

Yes

No

Calculated pressure
< -5,000 mbar

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-103

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Target clutch 2 (even) pressure: 1,400 mbar or more to 3,000 mbar or less>

.

DTC SET CONDITIONS <TARGET 
CLUTCH 2 (EVEN) PRESSURE: 1,400 
MBAR OR MORE TO 3,000 MBAR OR 
LESS>

Check Conditions

• Engine speed: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

• Clutch 2 (even) state: Slip or engaged.

• Target clutch 2 (even) pressure: 1,400 mbar or 

more.

JUDGMENT CRITERIA

• Calculated pressure: −2,000 mbar or less. (220 

millisecond)

.

OBD-II DRIVE CYCLE PATTERN <TARGET 
CLUTCH 1 (ODD) PRESSURE: 1,400 
MBAR OR MORE TO 3,000 MBAR OR 
LESS>

The calculated pressure remains 

−2,000 mbar or 

more for 220 milliseconds. 

.

AC710673

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 220 msec

No

Yes

Yes

Yes

No

Calculated pressure
< -2,000 mbar

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-104

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Target clutch 2 (even) pressure: 1,400 mbar or less>

.

DTC SET CONDITIONS <TARGET 
CLUTCH 2 (EVEN) PRESSURE: 1,400 
MBAR OR LESS>

Check Conditions

• Engine speed: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

• Clutch 2 (even) state: Slip or engaged.

• Target clutch 2 (even) pressure: 1,400 mbar or 

less.

JUDGMENT CRITERIA

• Calculated pressure: −1,000 mbar or less. (220 

millisecond)

.

OBD-II DRIVE CYCLE PATTERN <TARGET 
CLUTCH 2 (EVEN) PRESSURE: 1,400 
MBAR OR LESS>

The clutch 2 (even) pressure remains 

−1,000 mbar or 

more for 220 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.

AC710674

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 220 msec

No

Yes

Yes

Yes

No

Calculated pressure
< -1,000 mbar