Mitsubishi Lancer Evolution X. Manual — part 549

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-153

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: 650 r/min or more.
• Time since above engine condition: 1.5 seconds

or more.

• Shift system status: Gear change mode (during

shift fork moving).

JUDGMENT CRITERIA

• Shift fork 2 position counter (digitized sensor

value): −500 counts or less, or shift fork 2 position

counter (digitized sensor value): 500 counts or
more. (180 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The status with the shift fork 2 position counter (digi-
tized sensor value) −500 counts or more, or with the

shift fork 2 position counter (digitized sensor value)
500 counts or less continues for 180 millisecond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of shift fork position sensor 2

AC710681

START

No

Good

Malfunction

END

Continuous failure
for 180 msec

No

Yes

Yes

Yes

No

No

Shift fork position
counter < -500

Yes

Shift fork position
counter > 500

Monitoring condition met

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-154

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. Check whether the DTC is reset.
After driving in the 5th gear, check that the DTC is reset.
Q: Is DTC No. P1827 set?

YES : Go to Step 3.
NO : Intermittent malfunction. (Refer to GROUP 00 − How

to Cope with Intermittent Malfunction

P.00-15

.)

STEP 3. 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 4.

STEP 4. 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 5th gear.
(3) Check the DTC.
Q: Is DTC No.P1827 set?

YES : Replace the transaxle assembly. (Refer to

P.22C-412

.)

NO : This diagnosis is complete.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-155

DTC P1828: Shift Fork Position Sensor 2 System (Neutral)

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 fork position sen-
sor 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The shift fork position sensor 2 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)

• P1825: Shift fork position sensor 2 system (Volt-

age low range out)

• P1826: Shift fork position sensor 2 system (Volt-

age high range out)

• P1827: Shift fork position sensor 2 system (Out-

put range out)

• P1829: Shift fork position sensor 2 system (Poor

performance)

• P183D: Shift fork 2 malfunction
• P1852: Shift fork 1 or 2 opposite direction move-

ment

• P1855: Shift fork 3 or 4 opposite direction move-

ment

• P1857: Odd number gear axle interlock
• P1876: Gear block 1st
• P1877: Gear block 2nd
• P1878: Gear block 3rd
• P1879: Gear block 4th
• P187A: Gear block 5th
• P187B: Gear block 6th
• P187C: Gear block reverse

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-156

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: 650 r/min or more.
• Time since above engine condition: 1.5 seconds

or more.

• Input shaft 1 (odd) speed: 500 r/min or more.
• Input shaft 2 (even) speed: 500 r/min or more.
• Shift fork 2 position: Neutral.
• Input shaft 2 (even) gear: Engaged.
• Engine speed − input shaft 2 speed: 50 r/min or

less.

JUDGMENT CRITERIA

• Calculated speed: 40 r/min or less. (500 millisec-

ond)

.

OBD-II DRIVE CYCLE PATTERN

The calculated speed remains 40 r/min or more for
500 millisecond.

.

PROBABLE CAUSES

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

AC711383

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 500 msec

No

Yes

Yes

Yes

No

Calculated input
shaft speed

AC

Calculated input shaft
speed <= 40 r/min