Mitsubishi Evolution X. Manual — part 441
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-221
STEP 2. Scan tool diagnostic trouble code
Check the engine diagnostic trouble code. (Refer to GROUP
13A
− Troubleshooting
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 3.
STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P1870 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1871: APS system (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 APS 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)
• 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)
• P1870: Engine torque 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
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-222
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.
JUDGMENT CRITERIA
• APS signal: Parity or toggle error
.
OBD-II DRIVE CYCLE PATTERN
Receives the normal value of the APS signal, or the
parity, toggle are normal.
.
PROBABLE CAUSES
• The CAN bus line is defective.
• APS malfunction
• Malfunction of engine control module
• Malfunction of TC-SST-ECU
DIAGNOSTIC PROCEDURE
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.
APS signal
toggle bit = error
AC710735
START
No
Yes
Yes
No
Good
Malfunction
END
Monitoring condition met
No
Yes
APS signal
parity bit = error
Continuous failure
for 200 msec
No
Yes
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-223
STEP 2. Scan tool diagnostic trouble code
Check the engine diagnostic trouble code. (Refer to GROUP
13A
− Troubleshooting
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 3.
STEP 3. Check whether the DTC is reset.
Q: Is DTC No. P1871 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1872: Between shift lever and TC-SST system (Q-A function 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 shift lever-ECU is nor-
mal.
.
DESCRIPTIONS OF MONITOR METHODS
The shift lever-ECU 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)
• 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)
• P1870: Engine torque signal abnormality
• P1871: APS system (Signal abnormality)
Sensor (The sensor below is determined to be
normal)
• Clutch 1 pressure sensor
• Clutch 2 pressure sensor
• APS
• Shift lever-ECU
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-224
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.
JUDGMENT CRITERIA
• Communication algorithm: Undesigned signal.
.
OBD-II DRIVE CYCLE PATTERN
The communication algorithm is normal.
.
PROBABLE CAUSES
• Malfunction of the shift lever-ECU
• 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.
STEP 2. Scan tool diagnostic trouble code
Check the shift lever diagnostic trouble code. (Refer to
.)
Q: Is the DTC set?
YES : Perform the relevant troubleshooting.
NO : Go to Step 3.
Question - Answer
algorithm = failed
AC710736
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
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