Mitsubishi Evolution X. Manual - part 408

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-89

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: 3.07 V or less. (140 millisecond)

.

OBD-II DRIVE CYCLE PATTERN

The supply voltage remains 3.07 V or more for 140 
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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1806 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

.)

AC710669

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 140 msec

No

Yes

Yes

Yes

No

Sensor supply < 3.07 V

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-90

DTC P1807: Shift Fork Position Sensor 3 and 4 System (Power supply voltage high 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 supply voltage to the 
shift fork position sensor 3 and 4 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The supply voltage to the shift fork position sensor 3 
and 4 is too high.

.

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)

• P182A: Shift fork position sensor 3 system (Volt-

age low range out)

• P182B: Shift fork position sensor 3 system (Volt-

age high range out)

• P182C: Shift fork position sensor 3 system (Out-

put range out)

• P182E: Shift fork position sensor 3 system (Poor 

performance)

• P1831: Shift fork position sensor 4 system (Volt-

age low range out)

• P1832: Shift fork position sensor 4 system (Volt-

age high range out)

• P1833: Shift fork position sensor 4 system (Out-

put range out)

• P1835: Shift fork position sensor 4 system (Poor 

performance)

• P1836: Shift fork 1 malfunction

• P183D: Shift fork 2 malfunction

• P1844: Shift fork 3 malfunction

• P184B: Shift fork 4 malfunction

• P1852: Shift fork 1 or 2 opposite direction move-

ment

• P1855: Shift fork 3 or 4 opposite direction move-

ment

• P1857: Odd number gear axle interlock

• P1858: Even number gear axle interlock

• P1876: Gear block 1st

• P1877: Gear block 2nd

• P1878: Gear block 3rd

• P1879: Gear block 4th

• P187A: Gear block 5th

• P187B: Gear block 6th

• P187C: Gear block reverse

Sensor (The sensor below is determined to be 

normal)

• Shift fork position sensor 3

• Shift fork position sensor 4

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-91

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

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. P1807 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

.)

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-92

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

.

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)

.

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