Mitsubishi Evolution X. Manual — part 446

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-241

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)

• P181B: Clutch 1 (Pressure low range out)

• P181C: Clutch 1 (Pressure high range out)

• P1859: Disengagement too late with clutch 1

Sensor (The sensor below is determined to be

normal)

• Clutch 1 pressure sensor

• Clutch/shift switching solenoid 1

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-242

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

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.

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

.)

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-243

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)

• P1859: Disengagement too late with clutch 1

Sensor (The sensor below is determined to be

normal)

• Clutch 1 pressure sensor

• Clutch/shift switching solenoid 1

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-244

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: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

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

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