Mitsubishi Evolution X. Manual — part 438

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-209

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P186A 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 P186B: High side 3 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 3 circuit is
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The high side 3 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)

• P0753: Shift select solenoid 1 system (Open cir-

cuit)

• P0973: Shift select solenoid 1 system (Short to

ground)

• P0974: Shift select solenoid 1 system (Short to

power supply)

• P2727: Clutch/shift pressure solenoid 2 system

(Open circuit)

• P2728: Clutch/shift pressure solenoid 2 system

(Overcurrent)

• P2729: Clutch/shift pressure solenoid 2 system

(Short to ground)

• P2730: Clutch/shift pressure solenoid 2 system

(Short to power supply)

• P2809: Clutch/shift switching solenoid 2, spool

stuck

• P2812: Clutch/shift switching solenoid 2 system

(Open circuit)

• P2814: Clutch/shift switching solenoid 2 system

(Short to ground)

• P2815: Clutch/shift switching solenoid 2 system

(Short to power supply)

• P181B: Clutch 1 (Pressure low range out)

• P181C: Clutch 1 (Pressure high range out)

• P1859: Disengagement too late with clutch 1

• P181E: Clutch 2 (Pressure low range out)

• P181F: Clutch 2 (Pressure high range out)

• P185B: Disengagement too late with clutch 2

Sensor (The sensor below is determined to be

normal)

• Shift select solenoid 1

• Clutch/shift pressure solenoid 2

• Clutch/shift switching solenoid 2

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-210

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 3 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-211

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P186B 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 P186C: High side 3 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 3 circuit is
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The high side 3 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)

• P0753: Shift select solenoid 1 system (Open cir-

cuit)

• P0973: Shift select solenoid 1 system (Short to

ground)

• P0974: Shift select solenoid 1 system (Short to

power supply)

• P2727: Clutch/shift pressure solenoid 2 system

(Open circuit)

• P2728: Clutch/shift pressure solenoid 2 system

(Overcurrent)

• P2729: Clutch/shift pressure solenoid 2 system

(Short to ground)

• P2730: Clutch/shift pressure solenoid 2 system

(Short to power supply)

• P2809: Clutch/shift switching solenoid 2, spool

stuck

• P2812: Clutch/shift switching solenoid 2 system

(Open circuit)

• P2814: Clutch/shift switching solenoid 2 system

(Short to ground)

• P2815: Clutch/shift switching solenoid 2 system

(Short to power supply)

• P181B: Clutch 1 (Pressure low range out)

• P181C: Clutch 1 (Pressure high range out)

• P1859: Disengagement too late with clutch 1

• P181E: Clutch 2 (Pressure low range out)

• P181F: Clutch 2 (Pressure high range out)

• P185B: Disengagement too late with clutch 2

Sensor (The sensor below is determined to be

normal)

• Shift select solenoid 1

• Clutch/shift pressure solenoid 2

• Clutch/shift switching solenoid 2

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-212

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 3 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