Mitsubishi Evolution X. Manual — part 434

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-193

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P185B 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 P185C: Engagement too late with clutch 2

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 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The engagement of the clutch 2 is determined to be
late.

.

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. P185C 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 P185D: Clutch open not possible

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 1 and 2 are nor-
mal.

.

DESCRIPTIONS OF MONITOR METHODS

The disengagement of the clutch 1 and 2 are deter-
mined to be impossible.

.

MONITOR EXECUTION

• Continuous

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-194

MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

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.

• Clutch 1 state: Not stroking (not to close).

• Clutch 2 state: Not stroking (not to close).

• Input shaft 1 (odd) gear: Engaged.

• Input shaft 2 (even) gear: Engaged.

• Current gear: Not 1st gear and reverse gear.

JUDGMENT CRITERIA

• Current clutch torque − Clutch 1 (odd) permit

torque

− Clutch 2 (even) permit torque: (100 N⋅ m

(74 ft-lb) + (Current clutch torque

× 0.25%)) or

more. (2 seconds)

.

OBD-II DRIVE CYCLE PATTERN

The current clutch torque

− clutch 1 (odd) permit

torque

− clutch 2 (even) permit torque remain (100

N

⋅ m (74 ft-lb) + (current clutch torque × 0.25%)) or

less for 2 seconds.

.

PROBABLE CAUSES

• Clutch malfunction

AC710724

START

No

Good

Malfunction

END

No

Yes

Yes

No

Monitoring condition met

Calculated torque
> calculated criteria

Yes

Continuous failure
for 2 sec

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-195

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. P185D 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 P1862: High side 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 high side 1 circuit is
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply current to the high side 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)

• P0758: Shift select solenoid 2 system (Open cir-

cuit)

• P0976: Shift select solenoid 2 system (Short to

ground)

• P0977: Shift select solenoid 2 system (Short to

power supply)

• P0746: Line pressure solenoid system (Drive cur-

rent range out)

• P0960: Line pressure solenoid system (Open cir-

cuit)

• P0961: Line pressure solenoid system (Overvolt-

age)

• P0962: Line pressure solenoid system (Short to

ground)

• P0963: Line pressure solenoid system (Short to

power supply)

• P0968: Shift/cooling switching solenoid system

(Open circuit)

• P0970: Shift/cooling switching solenoid system

(Short to ground)

• P0971: Shift/cooling switching solenoid system

(Short to power supply)

Sensor (The sensor below is determined to be

normal)

• Shift select solenoid 2

• Line pressure solenoid

• Shift/cooling switching solenoid

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-196

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.

• High side 1 switch: ON.

JUDGMENT CRITERIA

• FET (Field Effect Transistor) current: 8.1 A or

more, and FET (Field Effect Transistor) output:
100 mV or less (1 second).

.

OBD-II DRIVE CYCLE PATTERN

The status with the current of the FET channel shunt
8.1 A or less and with the FET channel output 100
mV or more continues for 1 second.

.

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.

AC710725

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Monitoring condition met

FET* current > 8.1 A

Yes

No

FET* output < 100 mV

Continuous failure
for 1 sec

*FET : Field Effect Transistor