Mitsubishi Lancer Evolution X. Manual - part 586

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-301

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.
• Clutch/shift pressure solenoid 2: OFF.

JUDGMENT CRITERIA

• FET (Field Effect Transistor) output: (Battery volt-

age − 2 V) or more. (160 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains (Battery voltage − 2 

V) or less for 160 milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of clutch/shift pressure solenoid 2

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.

AC710659

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 160 msec

No

Yes

Yes

Yes

FET* output
> Battery voltage - 2V

No

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-302

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2730 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 P2733: Clutch/Shift Switching Solenoid 1, spool stuck

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 switching 
solenoid 1 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift switching solenoid 1 is determined to 
be seized.

.

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)

• 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)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-303

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: 650 r/min or more.
• Time since above engine condition: 1.5 seconds 

or more.

• Clutch/shift switching solenoid 1: ON.
• Clutch/shift switching solenoid 2: OFF.
• Clutch cooling flow solenoid: OFF.
• Clutch/shift pressure solenoid 1: ON.

JUDGMENT CRITERIA

• Clutch 1 (odd) pressure: 1,400 hPa or more, or 

clutch 1 pressure sensor (odd) change: 0, and 
shift fork position sensor 1 and 2 change: 0. (200 
millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The status with the clutch 1 pressure 1,400 hPa or 
less, or with the clutch 1 pressure sensor (odd) and 
shift fork position sensor 1 and 2 changed continues 
for 200 millisecond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Insufficient fluid level
• Malfunction of clutch/shift switching solenoid 1

AC710660

START

No

Good

Malfunction

END

Continuous failure
for 200 msec

No

Yes

Yes

Yes

No

Monitoring condition met

Clutch pressure
> 1,400 mbar

Yes

Yes

No

No

Clutch pressure
sensor change = 0

|Shift fork position
sensor change| = 0

hPa

AB

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-304

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.

WARNING

During inspection, the vehicle might move suddenly 
or the engine might stop. Be sure to depress the 
brake pedal securely. In addition, perform the vehicle 
inspection in a safe place isolated from people or 
objects.

(1) With the brake pedal pressed, start the engine.
(2) With the engine idle status, operate the shift lever in the 

following sequence: P → R → D. (Hold each range for 1 

seconds or more.)

(3) Check that the DTC is reset.
Q: Is DTC No.P2733 set?

YES : Go to Step 3.
NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 3. Check the fluid.
Q: Is the fluid level proper?

YES : Go to Step 4
NO :  Add the fluid.

STEP 4. Check the installation status of the mechatronic 
assembly.
Q: Is the mechatronic assembly installed correctly?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

NO :  Install the mechatronic assembly correctly. (Refer to 

P.22C-421

.)