Mitsubishi Evolution X. Manual - part 456

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-281

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 changeover solenoid 2: ON.

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

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.

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-282

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2815 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 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-283

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

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.

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

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-284

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. U0001 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 U0100: Engine Time-out Error

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

The periodic communication data from the engine 
control module cannot be received.

.

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

• U0001: Bus off

• 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

.