Mitsubishi Lancer Evolution X. Manual - part 519

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-33

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
• Malfunction of input shaft 1 speed sensor

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

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. Monitoring unit No. check
(1) Check the freeze frame data (item No. 30 to No. 37).
(2) Check which monitoring unit (No. 114 or No. 138) is set.
Q: Which monitoring unit is set, No. 114 or No. 138?

No. 114 : Go to Step 4
No. 138 : Go to Step 3

STEP 3. Check whether the DTC is reset.
(1) Erase the DTC.
(2) Drive the vehicle at 50 km/h (31 mph) or more.
(3) Check that the DTC is reset.
Q: Is DTC No.P0716 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

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-34

STEP 4. Check whether the DTC is reset.
(1) Erase the DTC.

CAUTION

When driving with each gear range, check that the gear 
engagement is correct and the engine rotation speed does 
not increase abnormally after gear shifting.
(2) Drive with shifting to each gear range.
(3) Check that the DTC is reset.
Q: Is DTC No.P0716 set?

YES : Go to Step 5.
NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 5. Scan tool Teach-In
(1) Carry out the Item No. 1: Plausibility check. (Refer to 

Special Function (Teach-In Reference Table 

P.22C-365

).) 

(2) After Teach-In, check which result ("Yes" or "No") is 

displayed in the Data list No. 101: Normal End. (Refer to 
Special Function (Teach-In Reference Table 

P.22C-365

).)

Q: Which is displayed, "Yes" or "No"?

"Yes" : Replace the mechatronic assembly. (Refer to 

P.22C-421

.)

"No" : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

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>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-35

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: 1.5 seconds 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
• Malfunction of input shaft 1 speed sensor

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

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-36

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. P0717 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 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

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

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-15

.) After repairing the CAN 

bus line, go to Step 2.