Mitsubishi Evolution X. Manual - part 435

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-197

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1862 set?

YES : Replace the TC-SST assembly. (Refer to 

P.22C-341

.)

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

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-198

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): Can’t be switched 

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

.

OBD-II DRIVE CYCLE PATTERN

The status with the FET switch ON and with the FET 
channel output 100 mV or more continues for 1 sec-
ond.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

DIAGNOSTIC PROCEDURE

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-14

.) After repairing the CAN 

bus line, go to Step 2.

AC710726

START

No

Good

Malfunction

END

No

Yes

Yes

Yes

No

Monitoring condition met

FET* switched off

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-199

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1863 set?

YES : Replace the TC-SST assembly. (Refer to 

P.22C-341

.)

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

.)

DTC P1864: High side 1 system (Short to power supply)

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 short to 
power supply.

.

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-200

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: OFF.

JUDGMENT CRITERIA

• FET (Field Effect Transistor): Can’t be switched 

off. (12 seconds)

.

OBD-II DRIVE CYCLE PATTERN

The FET switch remains OFF for 12 seconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

DIAGNOSTIC PROCEDURE

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-14

.) After repairing the CAN 

bus line, go to Step 2.

AC710727

START

No

Good

Malfunction

END

Continuous failure
for 12 sec

No

Yes

Yes

Monitoring condition met

Yes

No

FET* can't switched off

*FET : Field Effect Transistor