Mitsubishi Lancer Evolution X. Manual - part 563

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-209

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - SHIFT FORK 3 REQUESTED 
BUT SHIFT FORK 4 MOVEMENT>

Check Conditions

• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds 

or more.

• Requested shift fork: Shift fork 3.

JUDGMENT CRITERIA

• Shift fork position: 6 mm (0.24 inch) [4th gear 

side] or less, or − 6 mm (− 0.24 inch) [2nd gear 

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

shift fork 3 position: 2.5 mm (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 with the shift fork position 6 mm (0.24 
inch) [4th gear side] or more, or with − 6 mm (− 0.24 

inch) [2nd 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 millisecond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of TC-SST shift fork

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.

STEP 2. Monitoring unit No. check
(1) Check the freeze frame data (item No. 30 to No. 37).
(2) Check which monitoring unit (No. 162, No. 178, No. 186, or 

No. 187) is set.

Q: Which monitoring unit is set, No. 162, No. 178, No. 186, 

or No. 187?
No. 162 : Go to Step 4
Other than No. 162 : Go to Step 3

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-210

STEP 3. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive with shifting to each gear range.
(3) Check that the DTC is reset.
Q: Is DTC No.P1844 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

.)

STEP 4. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive in the 6th gear.
(3) Check that the DTC is reset.
Q: Is DTC No.P1844 set?

YES : Go to Step 5.
NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 5. Scan tool Teach-In
(1) Carry out the Item No.3: Line pressure Test. (Refer to 

Special Function (Teach-In Reference Table 

P.22C-365

).) 

(2) After Teach-In, check which result ("Yes" or "No") is 

displayed in the Data list No. 101: Normal End. (Refer to 
Special Function (Teach-In Reference Table 

P.22C-365

).)

Q: Which is displayed, "Yes" or "No"?

"Yes" : Go to Step 6
"No" : DTC No. P181B: Carry out the troubleshooting for 

the DTC No. P181B: Clutch 1 (Pressure low range 
out). (Refer to 

P.22C-109

.)

STEP 6. Scan tool Teach-In
(1) Carry out the Item No. 1: Plausibility check. (Refer to 

Special Function (Teach-In Reference Table 

P.22C-365

).) 

(2) After Teach-In, check which result ("Yes" or "No") is 

displayed in the Data list No. 101: Normal End. (Refer to 
Special Function (Teach-In Reference Table 

P.22C-365

).)

Q: Which is displayed, "Yes" or "No"?

"Yes" : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

"No" : Go to Step 7.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-211

STEP 7. Replace the mechatronic assembly, and check if 
the DTC is reset.
(1) Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

(2) Drive in the 6th gear.
(3) Check the DTC.
Q: Is DTC No.P1844 set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DTC P184B: Shift Fork 4 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 4 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The movement of the shift fork 4 is determined 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)

• P1844: Shift fork 3 malfunction

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence) <Functional check - blocked>

.

AC710675

START

No

Good

Malfunction

END

Yes

Malfunction criteria met

Yes

Monitoring condition met

No

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-212

DTC SET CONDITIONS <FUNCTIONAL 
CHECK - BLOCKED>

Check Conditions

• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds 

or more.

• Common high side 1 voltage: 7 V or more.
• Common high side 3 voltage: 7 V or more.

JUDGMENT CRITERIA

•

• Shift fork operation time: Shift fork operation time 

(threshold value) or more. (immediately)

• Shift fork operation time (threshold value): Equal 

the maximum allowed time x Coefficient. (imme-
diately)

.

OBD-II DRIVE CYCLE PATTERN 
<FUNCTIONAL CHECK - BLOCKED>

The shift fork operation time is threshold value or 
less.

.

LOGIC FLOW CHARTS (Monitor Sequence) <Functional check - Neutral>

.

AC710827

Maximum allowed time (sec)

25

20

15

10

5

-40

-20

0

20

120

Fluid temperature [˚C (˚F)]

AB

1 Until completion of initial shift fork action
2 After completion of initial shift fork action

(-40)

(-4)

(32)

(68)

(248)

AC710826

1.5

4,000

8,000

16,000

Line pressure (hPa)

1.25

1

Coefficient

AC

AC710686

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)