Mitsubishi Evolution X. Manual - part 393

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-29

JUDGMENT CRITERIA <Rationality>

• Failure condition 1 or failure condition 2 (Refer to 

Logic Flow Charts (Monitor Sequence) <Rational-
ity>). (500 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY>

Each value of failure condition 1 or failure condition 2 
(Logic Flow Charts (Monitor Sequence) <Rational-
ity>) returns to the normal value and remains in the 
state for 500 milliseconds.

.

LOGIC FLOW CHARTS (Monitor Sequence) <Rationality - plausibility failure>

.

AC710601

No

Yes

Malfunction

No

Yes

Monitoring condition met

No

Yes

Yes

Engine speed signal
status = not SNA

Continuous failure
for 250 msec

Input shaft speed*

1

> 12,800 r/min

START

END

Yes

|Input shaft speed*

1

| > (min(max(engine speed, 

input shaft target speed [current gear]*

1

,

input shaft target speed [target gear]*

1

) + 3,000 r/min,

12,800 r/min)

Good

No

No

*

1

 :In case of input shaft 1 (odd) speed sensor monitor, this is speed of input shaft (odd).

    In case of input shaft 2 (even) speed sensor monitor, this is speed of input shaft (even).

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-30

Check Conditions <Rationality plausibility fail-

ure>

• Voltage of battery: 8 V or more.

• Voltage of battery: 16.5 V or less.

JUDGMENT CRITERIA <Rationality plausibility 

failure>

• Input shaft 1 (odd) speed: Refer to Logic Flow 

Charts (Monitor Sequence) <Rationality plausibil-
ity failure>. (250 millisecond)

.

OBD-II DRIVE CYCLE PATTERN 
<RATIONALITY PLAUSIBILITY FAILURE>

The value of the Logic Flow Charts (Monitor 
Sequence) <Rationality plausibility failure> returns to 
the normal value and remains in the state for 250 mil-
liseconds.

.

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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P0716 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 P0717: Input shaft 1 (odd number gear axle) speed sensor system (Output current 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 input shaft 1 (odd num-
ber gear axle) speed sensor is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The output of the input shaft 1 (odd number gear 
axle) speed sensor 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)

• P0715: Input shaft 1 (odd number gear axle) 

speed sensor system (Output high range out)

• P0716: Input shaft 1 (odd number gear axle) 

speed sensor system (Poor performance)

• P2766: Input shaft 2 (even number gear axle) 

speed sensor system (Poor performance)

Sensor (The sensor below is determined to be 

normal)

• Input shaft 2 (even number gear axle) speed sen-

sor

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-31

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 engine start: 400 millisecond or more.

JUDGMENT CRITERIA

• Sensor current: 4 mA or less. (500 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The sensor current remains 4 mA or more for 500 
milliseconds.

.

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.

Sensor current < 4 mA

AC710596

START

No

Yes

Yes

No

Good

Malfunction

END

Monitoring condition met

No

Continuous failure
for 500 msec

Yes

No

Sensor current > 17 mA

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-32

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P0717 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 P0725: Engine speed 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 speed signal from the engine control 
module is determined to be abnormal.

.

PROBABLE CAUSES

• The CAN bus line is defective.

• Malfunction of crankshaft position sensor

• 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.

STEP 2. Scan tool diagnostic trouble code
Check the engine diagnostic trouble code. (Refer to GROUP 
13A 

− Troubleshooting 

P.13A-44

.)

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO :  Go to Step 3.

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P0725 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

.)