Mitsubishi Evolution X. Manual — part 440

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-217

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P186E 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 P186F: High side 3 system (Voltage low 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 high side 3 circuit is
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The voltage of the high side 3 circuit is determined to
be too low.

.

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-218

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: 500 r/min or more.

• Time since above engine condition: 400 millisec-

ond or more.

• FET (Field Effect Transistor) of high side 3:

Switched off.

JUDGMENT CRITERIA

• FET output: 100 mV or less. (5 seconds)

.

OBD-II DRIVE CYCLE PATTERN

The FET channel output remains 100 mV or more for
5 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.

AC710728

START

No

Good

Malfunction

END

Continuous failure
for 5 sec

No

Yes

Yes

Monitoring condition met

Yes

No

FET* output < 100 mV

*FET : Field Effect Transistor

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-219

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P186F 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 P1870: Engine torque signal abnormality

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 receives the periodic communication
data from the engine control module via the CAN bus
lines, and checks the data for abnormality.

.

DESCRIPTIONS OF MONITOR METHODS

The engine torque signal from the engine control
module is determined 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)

• P0841: Clutch 1 pressure sensor system (Poor

performance)

• P0842: Clutch 1 pressure sensor system (Output

low range out)

• P0843: Clutch 1 pressure sensor system (Output

high range out)

• P0846: Clutch 2 pressure sensor system (Poor

performance)

• P0847: Clutch 2 pressure sensor system (Output

low range out)

• P0848: Clutch 2 pressure sensor system (Output

high range out)

• P185D: Clutch open not possible

• U0001: Bus off

• U0100: Engine time-out error

• P1803: Shift lever system (CAN or LIN time-out

error)

• P1871: APS system (Signal abnormality)

• P1872: Between shift lever and TC-SST system

(Q-A function abnormality)

Sensor (The sensor below is determined to be

normal)

• Clutch 1 pressure sensor

• Clutch 2 pressure sensor

• APS

• Shift lever-ECU

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-220

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.

• Time after TC-SST-ECU start: 5 seconds or

more.

JUDGMENT CRITERIA

• Engine torque signal: SNA, or parity/toggle error.

.

OBD-II DRIVE CYCLE PATTERN

Receives the normal value of the engine torque sig-
nal, or the parity/toggle are normal.

.

PROBABLE CAUSES

• The CAN bus line is defective.

• Malfunction of engine control module

• Malfunction of TC-SST-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Scan tool CAN bus diagnostics
Using the scan tool, 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.

Engine torque signal = SNA

AC710734

START

No

Yes

Yes

No

Good

Malfunction

END

Monitoring condition met

No

Yes

Parity / Toggle bit = error