Mitsubishi Lancer Evolution X. Manual — part 574
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-253
• P2728: Clutch/shift pressure solenoid 2 system
(Overcurrent)
• P2729: Clutch/shift pressure solenoid 2 system
(Short to ground)
• P2730: Clutch/shift pressure solenoid 2 system
(Short to power supply)
• P2809: Clutch/shift switching solenoid 2, spool
stuck
• P2812: Clutch/shift switching solenoid 2 system
(Open circuit)
• P2814: Clutch/shift switching solenoid 2 system
(Short to ground)
• P2815: Clutch/shift switching solenoid 2 system
(Short to power supply)
• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)
• P181E: Clutch 2 (Pressure low range out)
• P181F: Clutch 2 (Pressure high range out)
Sensor (The sensor below is determined to be
normal)
• Shift select solenoid 1
• Clutch/shift pressure solenoid 2
• Clutch/shift switching solenoid 2
.
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: 650 r/min or more.
• Time since above engine condition: 1.5 seconds
or more.
• FET (Field Effect Transistor) of high side 3:
Switched off.
JUDGMENT CRITERIA
• FET output: 100 mV or less. (5 seconds)
.
OBD-II DRIVE CYCLE PATTERN
The FET channel output remains 100 mV or more for
5 seconds.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of power supply circuit (open circuit)
AC710728
START
No
Good
Malfunction
END
Continuous failure
for 5 sec
No
Yes
Yes
Monitoring condition met
Yes
No
FET* output < 100 mV
*FET : Field Effect Transistor
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-254
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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Check the TC-SST-ECU power supply circuit
Refer to
.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Repair the TC-SST-ECU power supply circuit. (Refer
to
.) After repairing the power supply
circuit, go to Step 3.
STEP 3. Check whether the DTC is reset.
After 10 or more seconds have passed with the engine idle sta-
tus, check that the DTC is reset.
Q: Is DTC No. P186F set?
YES : Replace the mechatronic assembly. (Refer to
.)
NO : Intermittent malfunction. (Refer to GROUP 00 − How
to Cope with Intermittent Malfunction
.)
DTC P1870: Engine torque 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 torque signal from the engine control
module 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)
• P0841: Clutch 1 pressure sensor system (Poor
performance)
• P0842: Clutch 1 pressure sensor system (Output
low range out)
• P0843: Clutch 1 pressure sensor system (Output
high range out)
• P0846: Clutch 2 pressure sensor system (Poor
performance)
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-255
• P0847: Clutch 2 pressure sensor system (Output
low range out)
• P0848: Clutch 2 pressure sensor system (Output
high range out)
• P185D: Clutch open not possible
• U0001: Bus off
• U0100: Engine time-out error
• P1803: Shift lever system (CAN or LIN time-out
error)
• P1871: APS system (Signal abnormality)
• P1872: Between shift lever and TC-SST system
(Q-A function abnormality)
Sensor (The sensor below is determined to be
normal)
• Clutch 1 pressure sensor
• Clutch 2 pressure sensor
• APS
• Shift lever-ECU
.
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 TC-SST-ECU start: 5 seconds or
more.
AC902557
START
No
Good
Malfunction
END
Yes
Yes
No
Yes
No
Yes
Yes
No
Monitoring condition met
No
Continuous failure
for 200 msec
Engine torque signal = SNA
Parity bit = error
Engine torque signal
toggle bit = error
Engine torque signal
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-256
JUDGMENT CRITERIA
• Engine torque signal: SNA, or parity/toggle error.
(immediately)
.
OBD-II DRIVE CYCLE PATTERN
Receives the normal value of the engine torque sig-
nal, or the parity/toggle are normal.
.
PROBABLE CAUSES
• The CAN bus line is defective.
• 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
.) After repairing the CAN
bus line, go to Step 2.
STEP 2. Scan tool diagnostic trouble code.
Check if the diagnostic trouble code is set to the system other
than TC-SST.
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 3.
STEP 3. Scan tool diagnostic trouble code.
After 15 seconds with the engine idle status, check that the
diagnostic trouble code for engine is set. (Refer to GROUP 13A
− Troubleshooting
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 4.
STEP 4. Check whether the DTC is reset.
After 15 seconds with the engine idle status, check that the
DTC is reset.
Q: Is DTC No.P1870 set?
YES : Replace the mechatronic assembly. (Refer to
.)
NO : Intermittent malfunction. (Refer to GROUP 00 − How
to Cope with Intermittent Malfunction
.)
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