Mitsubishi Lancer Evolution X. Manual - part 568

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-229

DTC P185D: Clutch open not possible

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 clutch 1 and 2 are nor-
mal.

.

DESCRIPTIONS OF MONITOR METHODS

The disengagement of the clutch 1 and 2 are deter-
mined to be impossible.

.

PROBABLE CAUSES

• Malfunction of clutch assembly

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 15 seconds with the engine idle status, check that the 
DTC is reset.
Q: Is DTC No. P185D set?

YES : Replace the clutch assembly. (Refer to GROUP 22D 

−Transaxle 

P.22D-6

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-230

DTC P1862: High side 1 system (Overcurrent)

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 high side 1 circuit is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply current to the high side 1 is determined to 
be overcurrent.

.

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)

• P0758: Shift select solenoid 2 system (Open cir-

cuit)

• P0976: Shift select solenoid 2 system (Short to 

ground)

• P0977: Shift select solenoid 2 system (Short to 

power supply)

• P0746: Line pressure solenoid system (Drive cur-

rent range out)

• P0960: Line pressure solenoid system (Open cir-

cuit)

• P0961: Line pressure solenoid system (Overvolt-

age)

• P0962: Line pressure solenoid system (Short to 

ground)

• P0963: Line pressure solenoid system (Short to 

power supply)

• P0968: Shift/cooling switching solenoid system 

(Open circuit)

• P0970: Shift/cooling switching solenoid system 

(Short to ground)

• P0971: Shift/cooling switching solenoid system 

(Short to power supply)

Sensor (The sensor below is determined to be 

normal)

• Shift select solenoid 2
• Line pressure solenoid
• Shift/cooling switching solenoid

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-231

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.
• High side 1 switch: ON.

JUDGMENT CRITERIA

• FET (Field Effect Transistor) current: 8.1 A or 

more, and FET (Field Effect Transistor) output: 
100 mV or less (1 second).

.

OBD-II DRIVE CYCLE PATTERN

The status with the current of the FET channel shunt 
8.1 A or less and with the FET channel output 100 
mV or more continues for 1 second.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

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

AC710725

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Monitoring condition met

FET* current > 8.1 A

Yes

No

FET* output < 100 mV

Continuous failure
for 1 sec

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-232

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 5 or more seconds have passed with the engine idle sta-
tus, check that the DTC is reset.
Q: Is DTC No. P1862 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 P1863: High side 1 system (Open circuit)

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 high side 1 circuit is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The high side 1 circuit is determined to be open.

.

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)

• P0758: Shift select solenoid 2 system (Open cir-

cuit)

• P0976: Shift select solenoid 2 system (Short to 

ground)

• P0977: Shift select solenoid 2 system (Short to 

power supply)

• P0746: Line pressure solenoid system (Drive cur-

rent range out)

• P0960: Line pressure solenoid system (Open cir-

cuit)

• P0961: Line pressure solenoid system (Overvolt-

age)

• P0962: Line pressure solenoid system (Short to 

ground)

• P0963: Line pressure solenoid system (Short to 

power supply)

• P0968: Shift/cooling switching solenoid system 

(Open circuit)

• P0970: Shift/cooling switching solenoid system 

(Short to ground)

• P0971: Shift/cooling switching solenoid system 

(Short to power supply)

Sensor (The sensor below is determined to be 

normal)

• Shift select solenoid 2
• Line pressure solenoid
• Shift/cooling switching solenoid

.