Mitsubishi Evolution X. Manual - part 395

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-37

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. 

(1 second)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains 1 V or less 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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P0758 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

.)

AC710622

START

No

Yes

Yes

Good

Malfunction

END

Monitoring condition met

No

Continuous failure
for 1 sec

No

Yes

FET* output > 1 V

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-38

DTC P0776: Clutch Cooling Flow Solenoid System (Drive current range out)

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 cooling flow 
solenoid is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The difference between the actual current of the 
clutch cooling flow solenoid and target current is 
large.

.

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)

• P0777: Clutch cooling flow solenoid system 

(Stuck)

• P0964: Clutch cooling flow solenoid system 

(Open circuit)

• P0965: Clutch cooling flow solenoid system 

(Overvoltage)

• P0966: Clutch cooling flow solenoid system 

(Short to ground)

• P0967: Clutch cooling flow solenoid system 

(Short to power supply)

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence)

.

AC710633

START

No

Yes

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 1 sec

No

Yes

Yes

No

Calculated current
> 1,000 mA

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-39

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 <Rationality-high>

• Calculated current (actual current − target cur-

rent): 1,000 mA or more. (1 second)

JUDGMENT CRITERIA <Rationality-low>

• Calculated current (target current − actual cur-

rent): 1,000 mA or more. (1 second)

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY-HIGH>

The value of the calculated current (actual current 

− 

target current) remains 1,000 mA or less for 1 sec-
ond.

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY-LOW>

The value of the calculated current (target current 

− 

actual current) remains 1,000 mA or less for 1 sec-
ond.

.

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. P0776 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 P0777: Clutch Cooling Flow Solenoid System (Stuck)

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 cooling flow 
solenoid is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch cooling flow solenoid is determined to be 
seized.

.

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)

• P0776: Clutch cooling flow solenoid system 

(Drive current range out)

• P0964: Clutch cooling flow solenoid system 

(Open circuit)

• P0965: Clutch cooling flow solenoid system 

(Overvoltage)

• P0966: Clutch cooling flow solenoid system 

(Short to ground)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-40

• P0967: Clutch cooling flow solenoid system 

(Short to power supply)

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 target pressure: 380 mbar or more.

• Clutch 2 target pressure: 380 mbar or more.

.

JUDGMENT CRITERIA

• Clutch 1 pressure: 100 mbar or less, and clutch 2 

pressure: 100 mbar or less. (3 seconds)

.

OBD-II DRIVE CYCLE PATTERN

The Clutch 1 pressure and clutch 2 pressure remain 
100 mbar or more for 3 seconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

AC710635

START

No

Yes

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 3 sec

No

Yes

Yes

No

Clutch 2 pressure
< 100 mbar

Clutch 1 pressure
< 100 mbar

Yes

No