Mitsubishi Evolution X. Manual — part 442
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-225
STEP 3. Replace the shift lever assembly, and check if the
diagnostic trouble code is reset.
(1) Replace the shift lever assembly. (Refer to
.)
(2) Check the DTC.
Q: Is DTC No. P1872 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1873: Clutch 1 System (Pressure 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 checks that the clutch 1 pressure is
normal.
.
DESCRIPTIONS OF MONITOR METHODS
The clutch 1 pressure is determined to be abnormal.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of TC-SST clutch
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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1873 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1874: Clutch 2 System (Pressure 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 checks that the clutch 2 pressure is
normal.
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-226
DESCRIPTIONS OF MONITOR METHODS
The clutch 2 pressure is determined to be abnormal.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of TC-SST clutch
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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1874 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1875: Damper 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 damper (closer to the
engine than input shaft) is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The damper speed sensor 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)
• P0716: Input shaft 1 (odd number gear axle)
speed sensor system (Poor performance)
• 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 1 (odd number gear axle) speed sen-
sor
• Input shaft 2 (even number gear axle) speed sen-
sor
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-227
LOGIC FLOW CHARTS (Monitor Sequence)
.
AC710617
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
Continuous failure
for 400 msec
No
Yes
Sensor output speed
> 16,000 r/min
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-228
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.
• Engine speed: 500 r/min or more.
• Time since above engine condition: 400 millisec-
ond.
JUDGMENT CRITERIA
• Sensor output speed: 16,000 r/min or more. (400
millisecond)
• |"Engine speed via CAN" − "Sensor output
speed"|: 500 r/min or more. (500 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
• The output of the sensor remains 16,000 r/min or
less for 400 milliseconds.
• The value of the |"Engine speed via CAN" − "Sen-
sor output speed"| remains 500 r/min or less 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
.) After repairing the CAN
bus line, go to Step 2.
AC710618
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
Continuous failure
for 500 msec
No
Yes
|Engine speed (CAN)-
sensor output speed|
> 500 r/min
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