Mitsubishi Lancer Evolution X. Manual - part 582

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-285

STEP 3. Replace the mechatronic assembly, and check if 
the DTC is reset.
(1) Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

(2) Drive with shifted in the 2nd gear and 4th gear.
(3) Check the DTC.
Q: Is DTC No.P1888 set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DTC P1890 TEACH-IN NOT COMPLETED

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 Teach-In is completed nor-
mally.

.

DESCRIPTIONS OF MONITOR METHODS

It is judged that Teach-In is not completed normally.

.

PROBABLE CAUSES

• Teach-In not completed
• Malfunction of TC-SST-ECU
• Malfunction of clutch assembly

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

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-15

.) After repairing the CAN 

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
(1) Erase the DTC.
(2) After 10 or more seconds have passed with the ignition 

switch ON position, check that the DTC is reset.

Q: Is DTC No.P1890 set?

YES : Go to Step 3.
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-286

STEP 3. Scan tool Teach-In
(1) Perform Teach-In (the same item as the mechatronic 

assembly replacement).(Refer to 

P.22C-7

.)

(2) After 10 or more seconds have passed with the ignition 

switch ON position, check that the DTC is reset.

Q: Is DTC No.P1890 set?

YES : Go to Step 4.
NO :  This diagnosis is complete.

STEP 4. Replace the mechatronic assembly, and check if 
the DTC is reset.
(1) Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

(2) After 10 or more seconds have passed with the ignition 

switch ON position, check that the DTC is reset.

Q: Is DTC No.P1890 set?

YES : Go to Step 5.
NO :  This diagnosis is complete.

STEP 5. Replace the clutch assembly, and check if the DTC 
is reset.
(1) Replace the clutch assembly. (Refer to GROUP 22D − 

Transaxle 

P.22D-6

.)

(2) After 10 or more seconds have passed with the ignition 

switch ON position, check that the DTC is reset.

Q: Is DTC No. P1890 set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DTC P2718: Clutch/Shift Pressure Solenoid 1 System (Open circuit)

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/shift pressure 
solenoid 1 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift pressure solenoid 1 circuit is deter-
mined to be open.

.

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)

• P2733: Clutch/shift switching solenoid 1, spool 

stuck

• P2736: Clutch/shift switching solenoid 1 system 

(Open circuit)

• P2738: Clutch/shift switching solenoid 1 system 

(Short to ground)

• P2739: Clutch/shift switching solenoid 1 system 

(Short to power supply)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-287

• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor
• Clutch/shift switching solenoid 1

.

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

• FET (Field Effect Transistor) output: 1 V or more. 

(400 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains 1 V or less for 400 
milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of clutch/shift pressure solenoid 1

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

AC710656

START

No

Yes

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 400 msec

No

Yes

No

Yes

FET* output > 1 V

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-288

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-15

.) After repairing the CAN 

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2718 set?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DTC P2719: Clutch/Shift Pressure Solenoid 1 System (Overcurrent)

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/shift pressure 
solenoid 1 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply current to the clutch/shift pressure sole-
noid 1 is determined to be overcurrent.

.

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)

• P2733: Clutch/shift switching solenoid 1, spool 

stuck

• P2736: Clutch/shift switching solenoid 1 system 

(Open circuit)

• P2738: Clutch/shift switching solenoid 1 system 

(Short to ground)

• P2739: Clutch/shift switching solenoid 1 system 

(Short to power supply)

• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor
• Clutch/shift switching solenoid 1

.