Mitsubishi Evolution X. Manual - part 430

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-177

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - SHIFT FORK 4 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 4.

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 4 

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

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - SHIFT FORK 4 
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 4 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-178

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Functional check - shift fork 4 requested but shift fork 3 movement>

.

No

AC710717

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

No

Yes

Monitoring condition met

Yes

No

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

Yes

Shift fork 3 position
neutral position

Yes

No

|Initialized fork position -
shift fork 4 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

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-179

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - SHIFT FORK 4 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 4.

JUDGMENT CRITERIA

• Shift fork 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 4 position: 2.5mm (0.098 inch) or less. 
(200 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - SHIFT FORK 3 
REQUESTED BUT SHIFT FORK 4 
MOVEMENT>

The status of 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 3 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 the DTC No. P184B 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 P1852: Shift Fork 1 or 2 opposite direction movement

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 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The movements of the shift fork 1 and 2 are deter-
mined to be abnormal.

.

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)

• P1836: Shift fork 1 malfunction

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-180

• P183D: Shift fork 2 malfunction

• P1844: Shift fork 3 malfunction

• P184B: Shift fork 4 malfunction

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence) 

 

<Functional check - move opposite direction right side>

.

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - MOVE OPPOSITE DIRECTION 
RIGHT SIDE>

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.

• Shift fork 1 and 2 current gear: Neutral.

• Shift fork 1 and 2 target direction: 0 mm (0 inch) 

or less.

JUDGMENT CRITERIA

• Shift fork 1 and 2 position: 1.8 mm (0.071 inch) or 

more. (250 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - MOVE 
OPPOSITE DIRECTION RIGHT SIDE>

The shift fork 1 and 2 positions remain 1.8 mm 
(0.071 inch) or less for 250 milliseconds.

.

AC710720

START

No

Good

Malfunction

END

Continuous failure
for 250 msec

No

Yes

Yes

Monitoring condition met

Yes

No

Shift fork position
> 1.8 mm (0.071 inch)