Mitsubishi Evolution X. Manual - part 424

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-153

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Functional check - Shift fork 1 requested but shift fork 3 movement>

.

AC710687

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

No

Yes

Monitoring condition met

Yes

No

Yes

Shift fork 3 position
neutral position

No

Yes

No

|Initialized fork position -
shift fork 1 position| < 2.5 mm 
(0.098 inch)

Shift fork 3 position
6th gear side

Shift fork 3 position
> -6 mm (-0.24 inch)

Continuous failure
for 200 msec

|Shift fork 3 position|
> 1.8 mm (0.071 inch)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-154

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - SHIFT FORK 1 REQUESTED 
BUT SHIFT FORK 3 MOVEMENT>

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.

• Requested shift fork: Shift fork 1.

JUDGMENT CRITERIA

• Shift fork 3 position: −6 mm (−0.24 inch) [6th gear 

side] or more, or 1.8 mm (0.071 inch) [neutral 
position] or more, and initialized fork position 

− 

shift fork 1 position: 2.5 mm (0.098 inch) or less. 
(200 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - SHIFT FORK 1 
REQUESTED BUT SHIFT FORK 3 
MOVEMENT>

The status with the shift fork position 

−6 mm (−0.24 

inch) [6th gear side] or less, or with 1.8 mm (0.071 
inch) [neutral position] or less and with the initialized 
fork position 

− shift fork 1 position 2.5 mm (0.098 

inch) or more continues for 200 milliseconds.

.

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-155

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Functional check - Shift fork 1 requested but shift fork 2 movement>

.

AC710688

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Yes

Yes

No

Yes

No

Yes

No

Continuous failure
for 200 msec

Yes

Yes

No

No

Monitoring condition met

|Initialized fork position -
shift fork 1 position| < 2.5 mm
(0.098 inch)

Shift fork 2 position
5th gear side

Shift fork 2 position
 < 6 mm (0.24 inch)

Shift fork 2 position
3rd gear side

No

Shift fork 2 position
neutral position

|Shift fork 2 position|
> 1.8 mm (0.071 inch)

Shift fork 2 position
 < -6 mm (-0.24 inch)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-156

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - SHIFT FORK 1 REQUESTED 
BUT SHIFT FORK 2 MOVEMENT>

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.

• Requested shift fork: Shift fork 1.

JUDGMENT CRITERIA

• Shift fork position: 6 mm (0.24 inch) [5th gear 

side] or less, or 

−6 mm (−0.24 inch) [3rd gear side] 

or more, or 1.8 mm (0.071 inch) [neutral position] 
or more, and initialized fork position 

− shift fork 1 

position: 2.5 mm (0.098 inch) or less. (200 milli-
second)

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - SHIFT FORK 1 
REQUESTED BUT SHIFT FORK 2 
MOVEMENT>

The status with the shift fork position 6 mm (0.24 
inch) [5th gear side] or more, or with 

−6 mm (−0.24 

inch) [3rd gear side] or less, or with 1.8 mm (0.071 
inch) [neutral position] or less and with the initialized 
fork position 

− shift fork 1 position 2.5 mm (0.098 

inch) or more continues for 200 milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

• Malfunction of TC-SST shift fork

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. P1836 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 P183D: Shift Fork 2 Malfunction

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 movement of the shift 
fork 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The movement of the shift fork 2 is determined to be 
abnormal.

.

MONITOR EXECUTION

• Continuous

.