Mitsubishi Lancer Evolution X. Manual - part 536

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-101

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.

JUDGMENT CRITERIA

• Supply voltage: 3.25 V or more. (140 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The supply voltage remains 3.25 V or less for 140 
milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of shift fork position sensor 1 and 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

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.

AC710670

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 140 msec

No

Yes

Yes

Yes

No

Sensor supply > 3.25 V

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-102

STEP 2. Check the TC-SST-ECU power supply circuit
Refer to 

P.22C-341

.

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the TC-SST-ECU power supply circuit. (Refer 

to 

P.22C-341

.) After repairing the power supply 

circuit, go to Step 3.

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P1805 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

.)

DTC P1806: Shift Fork Position Sensor 3 and 4 System (Power supply voltage low range out)

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 supply voltage to the 
shift fork position sensor 3 and 4 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply voltage to the shift fork position sensor 3 
and 4 is too low.

.

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)

• P182A: Shift fork position sensor 3 system (Volt-

age low range out)

• P182B: Shift fork position sensor 3 system (Volt-

age high range out)

• P182C: Shift fork position sensor 3 system (Out-

put range out)

• P182E: Shift fork position sensor 3 system (Poor 

performance)

• P1831: Shift fork position sensor 4 system (Volt-

age low range out)

• P1832: Shift fork position sensor 4 system (Volt-

age high range out)

• P1833: Shift fork position sensor 4 system (Out-

put range out)

• P1835: Shift fork position sensor 4 system (Poor 

performance)

• P1836: Shift fork 1 malfunction
• P183D: Shift fork 2 malfunction
• P1844: Shift fork 3 malfunction
• P184B: Shift fork 4 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
• P1858: Even 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)

• Shift fork position sensor 3
• Shift fork position sensor 4

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-103

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.

JUDGMENT CRITERIA

• Supply voltage: 3.07 V or less. (140 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The supply voltage remains 3.07 V or more for 140 
milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of shift fork position sensor 3 and 4

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.

AC710669

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 140 msec

No

Yes

Yes

Yes

No

Sensor supply < 3.07 V

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-104

STEP 2. Check the TC-SST-ECU power supply circuit
Refer to 

P.22C-341

.

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the TC-SST-ECU power supply circuit. (Refer 

to 

P.22C-341

.) After repairing the power supply 

circuit, go to Step 3.

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P1806 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

.)

DTC P1807: Shift Fork Position Sensor 3 and 4 System (Power supply voltage high range out)

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 supply voltage to the 
shift fork position sensor 3 and 4 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply voltage to the shift fork position sensor 3 
and 4 is too high.

.

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)

• P182A: Shift fork position sensor 3 system (Volt-

age low range out)

• P182B: Shift fork position sensor 3 system (Volt-

age high range out)

• P182C: Shift fork position sensor 3 system (Out-

put range out)

• P182E: Shift fork position sensor 3 system (Poor 

performance)

• P1831: Shift fork position sensor 4 system (Volt-

age low range out)

• P1832: Shift fork position sensor 4 system (Volt-

age high range out)

• P1833: Shift fork position sensor 4 system (Out-

put range out)

• P1835: Shift fork position sensor 4 system (Poor 

performance)

• P1836: Shift fork 1 malfunction
• P183D: Shift fork 2 malfunction
• P1844: Shift fork 3 malfunction
• P184B: Shift fork 4 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
• P1858: Even 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)

• Shift fork position sensor 3
• Shift fork position sensor 4

.