Mitsubishi Evolution X. Manual - part 409

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-93

OBD-II DRIVE CYCLE PATTERN

The difference of the calculated temperature is 20

° C 

(36

° F) or less.

.

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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1808 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 P180C: Clutch pressure cut spool sticking

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 pressure cut 
spool is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch pressure cut spool is determined to be 
seized.

.

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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P180C 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

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-94

DTC P181B: Clutch 1 (Pressure 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 clutch 1 pressure is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The pressure of the clutch 1 is 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)

• P0841: Clutch 1 pressure sensor system (Poor 

performance)

• P0842: Clutch 1 pressure sensor system (Output 

low range out)

• P0843: Clutch 1 pressure sensor system (Output 

high range out)

• P1836: Shift fork 1 malfunction

• P183D: Shift fork 2 malfunction

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor

.

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.

• Engine speed: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

AC710671

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 5 sec

No

Yes

Yes

Yes

No

Calculated pressure > 2,000 mbar

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-95

• Clutch 1 (odd) state: Slip or engaged.

• Clutch/shift pressure solenoid 1: Not OFF or not 

in valve cleaning mode.

JUDGMENT CRITERIA

• Calculated pressure: 2,000 mbar or more. (5 sec-

onds)

.

OBD-II DRIVE CYCLE PATTERN

The calculated pressure remains 2,000 mbar or less 
for 5 seconds. 

.

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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P181B 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 P181C: Clutch 1 (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 1 pressure is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The pressure of the clutch 1 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)

• P0841: Clutch 1 pressure sensor system (Poor 

performance)

• P0842: Clutch 1 pressure sensor system (Output 

low range out)

• P0843: Clutch 1 pressure sensor system (Output 

high range out)

• P1836: Shift fork 1 malfunction

• P183D: Shift fork 2 malfunction

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-96

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Target clutch 1 (odd) pressure: 3,000 mbar or more>

.

DTC SET CONDITIONS <TARGET 
CLUTCH 1 (ODD) 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 1 (odd) state: Slip or engaged.

• Target clutch 1 (odd) pressure: 3,000 mbar or 

more.

JUDGMENT CRITERIA

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

millisecond)

.

OBD-II DRIVE CYCLE PATTERN <TARGET 
CLUTCH 1 (ODD) 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