Mitsubishi Evolution X. Manual - part 454

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-273

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY>

Each value of failure condition 1 or failure condition 2 
(Logic Flow Charts (Monitor Sequence) <Rational-
ity>) returns to the normal value and remains in the 
state for 500 milliseconds.

.

LOGIC FLOW CHARTS (Monitor Sequence) <Rationality - plausibility failure>

.

AC710601

No

Yes

Malfunction

No

Yes

Monitoring condition met

No

Yes

Yes

Engine speed signal
status = not SNA

Continuous failure
for 250 msec

Input shaft speed*

1

> 12,800 r/min

START

END

Yes

|Input shaft speed*

1

| > (min(max(engine speed, 

input shaft target speed [current gear]*

1

,

input shaft target speed [target gear]*

1

) + 3,000 r/min,

12,800 r/min)

Good

No

No

*

1

 :In case of input shaft 1 (odd) speed sensor monitor, this is speed of input shaft (odd).

    In case of input shaft 2 (even) speed sensor monitor, this is speed of input shaft (even).

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-274

DTC SET CONDITIONS

Check Conditions <Rationality plausibility fail-

ure>

• Voltage of battery: 8 V or more.

• Voltage of battery: 16.5 V or less.

JUDGMENT CRITERIA <Rationality plausibility 

failure>

• Input shaft 2 (even) speed: Refer to Logic Flow 

Charts (Monitor Sequence) <Rationality plausibil-
ity failure>. (250 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY PLAUSIBILITY FAILURE>

The value of the Logic Flow Charts (Monitor 
Sequence) <Rationality plausibility failure> returns to 
the normal value and remains in the state for 250 mil-
liseconds.

.

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. P2766 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 P2809: Clutch/Shift Changeover Solenoid 2, spool 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/shift 
changeover solenoid 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift changeover solenoid 2 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)

• 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)

• P2812: Clutch/shift switching solenoid 2 system 

(Open circuit)

• P2814: Clutch/shift switching solenoid 2 system 

(Short to ground)

• P2815: Clutch/shift switching solenoid 2 system 

(Short to power supply)

• P181E: Clutch 2 (Pressure low range out)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-275

• P181F: Clutch 2 (Pressure high range out)

• P185B: Disengagement too late with clutch 2

Sensor (The sensor below is determined to be 

normal)

• Clutch/shift switching solenoid 1

.

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/shift changeover solenoid 2: ON.

• Clutch cooling flow solenoid: OFF.

• Clutch/shift pressure solenoid 2: ON.

JUDGMENT CRITERIA

• Clutch 2 (even) pressure: 1,400 mbar or more, or 

clutch 2 pressure sensor (even) change: 0, and 
shift fork position sensor 3 and 4 change: 0. (200 
millisecond)

.

AC710660

START

No

Good

Malfunction

END

Continuous failure
for 200 msec

No

Yes

Yes

Yes

No

Monitoring condition met

Clutch pressure
> 1,400 mbar

Yes

Yes

No

No

Clutch pressure
sensor change = 0

|Shift fork position
sensor change| = 0

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-276

OBD-II DRIVE CYCLE PATTERN

The status with the clutch 2 pressure 1,400 mbar or 
less, or with the clutch 2 pressure sensor (even) and 
shift fork position sensor 3 and 4 changed continues 
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. P2809 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 P2812: Clutch/Shift Changeover 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 clutch/shift 
changeover solenoid 2 circuit is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch/shift changeover 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)

• 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)

• P2809: Clutch/shift switching solenoid 2, spool 

stuck

• P2814: Clutch/shift switching solenoid 2 system 

(Short to ground)

• P2815: Clutch/shift switching solenoid 2 system 

(Short to power supply)

• P181E: Clutch 2 (Pressure low range out)

• P181F: Clutch 2 (Pressure high range out)

• P185B: Disengagement too late with clutch 2

Sensor (The sensor below is determined to be 

normal)

• Clutch/shift switching solenoid 1

.