Mitsubishi Lancer Evolution X. Manual - part 518

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-29

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. P0715 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 P0716: Input shaft 1 (odd number gear axle) speed sensor system (Poor performance)

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 rotation speed of the input shaft 1 (odd number 
gear axle) 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)

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

speed sensor system (Output high range out)

• P0717: Input shaft 1 (odd number gear axle) 

speed sensor system (Output low range out)

• 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>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

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LOGIC FLOW CHARTS (Monitor Sequence) <Rationality>

.

AC710597

START

No

Yes

Yes

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 500 msec

Yes

No

Failure condition 1

Failure condition 2

No

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

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LOGIC FLOW CHARTS (Monitor Sequence) <Rationality (Failure condition 1)>

.

LOGIC FLOW CHARTS (Monitor Sequence) <Rationality (Failure condition 2)>

.

DTC SET CONDITIONS

Check Conditions <Rationality>

• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
• Input shaft [odd] gear: engaged.

• Input shaft [even] gear: engaged.

JUDGMENT CRITERIA <Rationality>

• Failure condition 1 or failure condition 2 (Refer to 

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

AC710598

START

No

Yes

Malfunction

No

Yes

|(Input shaft speed [odd] /
total gear ratio [odd]) - (input shaft speed [even] /
total gear ratio [even])| > 100 

r/min

|(Input shaft speed*

1

 / total gear ratio [odd]) -

output shaft speed| > 300 

r/min

Failure condition 2

*

1

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

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

START

No

Yes

Malfunction

No

Yes

|(Input shaft speed [odd] /
total gear ratio [odd]) - (input shaft speed [even] /
total gear ratio [even])| > 100 

r/min

|(Input shaft speed*

1

 / total gear ratio [odd]) -

output shaft speed| > 300 

r/min

Failure condition 2

*

1

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

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

400

AC

*

2

)-

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

*2 : In case of input speed sensor A monitor, this is total gear ratio of input shaft (odd).
      In case of input speed sensor B monitor, this is total gear ratio of input shaft (even).

AC710599

No

Yes

Good

Malfunction

Input shaft speed [odd]
< 1 r/min

No

Yes

Input shaft speed [even]
> 50 r/min

No

Yes

Good

Malfunction

Input shaft speed [odd]
> 50 r/min

No

Yes

Input shaft speed [even]
< 1 r/min

*

2

*

3

*

2

 :In case of input speed sensor A monitor

*

3

 :In case of input speed sensor B monitor

*

3

*

4

*

3

*

4

AB

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

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.

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).