Mitsubishi Lancer Evolution X. Manual — part 585

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-297

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) current: 3.5 A or

more, and FET (Field Effect Transistor) output:
100 mV or less. (300 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The status with the current of the FET channel shunt
3.5 A or less and with the FET channel output 100
mV or more continues for 300 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

AC710657

START

No

Yes

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 300 msec

No

Yes

No

Yes

Yes

FET* output < 100 mV

FET* current > 3.5 A

No

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-298

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. P2728 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 P2729: Clutch/Shift Pressure Solenoid 2 System (Short to ground)

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 2 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift pressure solenoid 2 circuit is deter-
mined to be short to ground.

.

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)

• 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)

• 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)

• P2815: Clutch/shift switching solenoid 2 system

(Short to power supply)

• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)
• P181E: Clutch 2 (Pressure low range out)
• P181F: Clutch 2 (Pressure high range out)

Sensor (The sensor below is determined to be

normal)

• Clutch 2 pressure sensor
• Clutch/shift switching solenoid 2

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-299

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: 100 mV or

less. (400 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains 100 mV or more for
400 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.

AC710658

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 400 msec

No

Yes

Yes

Yes

FET* output < 100 mV

No

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-300

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2729 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 P2730: Clutch/Shift Pressure 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 pressure
solenoid 2 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift pressure 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)

• 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)

• 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)

• P2815: Clutch/shift switching solenoid 2 system

(Short to power supply)

• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)
• P181E: Clutch 2 (Pressure low range out)
• P181F: Clutch 2 (Pressure high range out)

Sensor (The sensor below is determined to be

normal)

• Clutch 2 pressure sensor
• Clutch/shift switching solenoid 2

.