Mitsubishi Lancer Evolution X. Manual - part 592

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-325

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2814 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 P2815: Clutch/Shift Switching Solenoid 2 System (Short to power supply)

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 2 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift switching solenoid 2 circuit is deter-
mined to be short to power supply.

.

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)

• 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)

• P2809: Clutch/shift switching solenoid 2, spool 

stuck

• P2812: Clutch/shift switching solenoid 2 system 

(Open circuit)

• P2814: Clutch/shift switching solenoid 2 system 

(Short to ground)

• P181E: Clutch 2 (Pressure low range out)
• P181F: Clutch 2 (Pressure high range out)

Sensor (The sensor below is determined to be 

normal)

• Clutch/shift switching solenoid 1

.

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-326

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 switching 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 switching 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.

AC710667

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 160 msec

No

Yes

Yes

Yes

No

FET* output
> Battery voltage - 2 V

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-327

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2815 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 U0001: Bus-off

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.

.

DESCRIPTIONS OF MONITOR METHODS

TC-SST-ECU ceases communication (bus-off).

.

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)

• 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)

• P185D: Clutch open not possible
• U0100: Engine time-out error
• P1803: Shift lever system (CAN or LIN time-out 

error)

• P1870: Engine torque signal abnormality
• P1871: APS system (Signal abnormality)
• P1872: Between shift lever and TC-SST system 

(Q-A function abnormality)

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor
• Clutch 2 pressure sensor
• APS
• Shift lever-ECU

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-328

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.
• Time after TC-SST-ECU start: 5 seconds or 

more.

JUDGMENT CRITERIA

• CAN communication: Error. (60 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The CAN communication remains normal for 60 milli-
seconds.

.

PROBABLE CAUSES

• The CAN bus line is defective.
• Malfunction of TC-SST-ECU

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

AC710731

START

No

Good

Malfunction

END

Yes

No

Yes

Yes

No

Continuous failure
for 60 msec

Yes

No

Monitoring condition met

CAN-H and CAN-L
shorted

CAN-H
short to ground

No

CAN -L
short to battery

Yes