Mitsubishi Lancer Evolution X. Manual - part 567

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-225

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.

JUDGMENT CRITERIA

• Shift fork 1 and 2 position: 3.8 mm (0.15 inch) or 

more. (500 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The shift fork 1 and 2 positions remain 3.8 mm (0.15 
inch) or less for 500 millisecond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of TC-SST gear

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

AC710722

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Monitoring condition met

|Shift fork 1 position|
> 3.8 mm

Yes

No

|Shift fork 2 position|
> 3.8 mm

Continuous failure
for 500 msec

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-226

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.
(1) Erase the DTC.
(2) With the ignition switch ON, operate the shift lever in the 

following sequence: P → R → D → R → P. (Hold each range 

for 5 seconds or more.)

(3) Check that the DTC is reset.
Q: Is DTC No. P1857 set?

YES : Go to Step 4.
NO :  Go to Step 3.

STEP 3. Check whether the DTC is reset.
(1) Drive with shifting to each gear range. (Hold each gear 

range for 5 seconds or more.)

(2) Check that the DTC is reset.
Q: Is DTC No.P1857 set?

YES : Go to Step 4.
NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 4. Scan tool diagnostic trouble code.
Check if any code from P1836, P183D, P1844, or P184B is set 
in addition to the diagnostic trouble code No. P1857.
Q: Check if any code from P1836, P183D, P1844, or P184B 

is set in addition to the diagnostic trouble code No. 
P1857.
YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

NO :  Replace the transaxle assembly. (Refer to 

P.22C-412

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-227

DTC P1858: Even number gear axle interlock

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 gear engagement is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The two gears are determined to be engaged in the 
even number gear range.

.

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)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence)

.

AC710723

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Monitoring condition met

|Shift fork 3 position|
> 3.8 mm (0.15 inch)

Yes

No

|Shift fork 4 position|
> 3.8 mm (0.15 inch)

Continuous failure
for 500 msec

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-228

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.

JUDGMENT CRITERIA

• Shift fork 3 and 4 position: 3.8 mm (0.15 inch) or 

more. (500 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The shift fork 3 and 4 positions remain 3.8 mm (0.15 
inch) or less for 500 millisecond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of TC-SST gear

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.
(1) Erase the DTC.
(2) Drive with shifting to each gear range. (Hold each gear 

range for 5 seconds or more.)

(3) Check that the DTC is reset.
Q: Is DTC No.P1858 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 diagnostic trouble code.
Check if any code from P1836, P183D, P1844, or P184B is set 
in addition to the diagnostic trouble code No. P1858.
Q: Check if any code from P1836, P183D, P1844, or P184B 

is set in addition to the diagnostic trouble code No. 
P1858.
YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

NO :  Replace the transaxle assembly. (Refer to 

P.22C-412

.)