Mitsubishi Lancer Evolution X. Manual — part 521

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-41

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
• Malfunction of shift select solenoid 1

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.

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-42

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P0753 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 P0758: Shift Select Solenoid 2 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 shift select solenoid 2
circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The shift select solenoid 2 circuit is determined 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)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-43

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
• Malfunction of shift select 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.

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-44

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

.