Mitsubishi Evolution X. Manual — part 451

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-261

DTC P2738: Clutch/Shift Changeover Solenoid 1 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
changeover solenoid 1 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift changeover solenoid 1 circuit is
determined 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)

• P2733: Clutch/shift switching solenoid 1, spool

stuck

• P2736: Clutch/shift switching solenoid 1 system

(Open circuit)

• 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)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence)

.

AC710662

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 200 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-262

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. (200 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains 100 mV or more for
200 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. P2738 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 P2739: Clutch/Shift Changeover Solenoid 1 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
changeover solenoid 1 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift changeover solenoid 1 circuit is
determined 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)

• 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)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-263

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 1: 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

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-264

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2739 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 P2741: Fluid Temperature Sensor System (Gradient 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.

.

DIAGNOSTIC FUNCTION

TC-SST-ECU checks that the output gradient of the
fluid temperature sensor is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The temperature change is determined to be abnor-
mal.

.

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)

• P2742: Fluid temperature sensor system (Output

low range out)

• P2743: Fluid temperature sensor system (Output

high range out)

• P1808: TC-SST-ECU temperature, fluid tempera-

ture sensor system (Correlation error)

Sensor (The sensor below is determined to be

normal)

• Not applicable

.