Mitsubishi Lancer Evolution X. Manual - part 548

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-149

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1825 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) Perform a test run of the vehicle.
(3) Check the DTC.
Q: Is DTC No.P1825 set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DTC P1826: Shift Fork Position Sensor 2 System (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 voltage of the shift fork 
position sensor 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The voltage of the shift fork position sensor 2 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)

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

age low range out)

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

put range out)

• P1828: Shift fork position sensor 2 system (Neu-

tral)

• 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

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-150

• 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

.

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

• Position sensor voltage: 3.008 V or more. (160 

millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The position sensor voltage remains 3.008 V or less 
for 160 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

AC710680

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 160 msec

No

Yes

Yes

Yes

No

Shift fork position
> 3.008 V

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-151

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.
Q: Is DTC No. P1826 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) Perform a test run of the vehicle.
(3) Check the DTC.
Q: Is DTC No.P1826 set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-152

DTC P1827: Shift Fork Position Sensor 2 System (Output 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 output of the shift fork 
position sensor 2 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The output of the shift fork position sensor 2 is 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)

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

age low range out)

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

age high range out)

• P1828: Shift fork position sensor 2 system (Neu-

tral)

• 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

.