Mitsubishi Lancer Evolution X. Manual - part 537

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-105

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.

JUDGMENT CRITERIA

• Supply voltage: 3.25 V or more. (140 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The supply voltage remains 3.25 V or less for 140 
milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of shift fork position sensor 3 and 4

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.

AC710670

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 140 msec

No

Yes

Yes

Yes

No

Sensor supply > 3.25 V

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-106

STEP 2. Check the TC-SST-ECU power supply circuit
Refer to 

P.22C-341

.

Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the TC-SST-ECU power supply circuit. (Refer 

to 

P.22C-341

.) After repairing the power supply 

circuit, go to Step 3.

STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P1807 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 P1808: TC-SST-ECU temperature, fluid temperature sensor system (Correlation error)

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 temperature sensor 
and the fluid temperature sensor are normal.

.

DESCRIPTIONS OF MONITOR METHODS

The difference of the output between the ECU tem-
perature sensor and fluid temperature sensor is 
large.

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-107

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.

JUDGMENT CRITERIA

• Calculated temperature ("Temperature B: Fluid 

temperature sensor output" − "Temperature A: 

TC-SST-ECU temperature sensor output"): 20° C 

(36° F) or more. (12 seconds)

.

OBD-II DRIVE CYCLE PATTERN

The difference of the calculated temperature is 20° C 

(36° F) or less.

.

PROBABLE CAUSES

• 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 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.

AC710595

START

No

Yes

Yes

Good

Malfunction

END

Monitoring condition met

No

Continuous failure for 12 sec

No

Yes

|Temperature B -
Temperature A|
> 20 ˚C (36 ˚F)

Temperature B: Fluid temperature sensor output

Temperature A: TC-SST-ECU temperature sensor output

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-108

STEP 2. Check whether the DTC is reset.
15 seconds after turning ON the ignition switch, check that the 
DTC is reset.
Q: Is DTC No. P1808 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 P180C: Clutch pressure cut spool sticking

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 clutch pressure cut 
spool is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The clutch pressure cut spool is determined to be 
seized.

.

PROBABLE CAUSES

• 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 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.
Warm up the engine and let it idle for 15 seconds. Then check 
that the DTC is reset. 
Q: Is DTC No. P180C 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

.)