Mitsubishi Lancer Evolution X. Manual — part 578
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-269
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 whether the DTC is reset.
(1) Erase the DTC.
(2) Drive with shifted in the 2nd gear.
(3) Check that the DTC is reset.
Q: Is DTC No.P1877 set?
YES : Go to Step 3.
NO : Intermittent malfunction. (Refer to GROUP 00 − How
to Cope with Intermittent Malfunction
.)
STEP 3. Scan tool Teach-In
(1) Carry out the Item No.3: Line pressure Test. (Refer to
Special Function (Teach-In Reference Table
).)
(2) After Teach-In, check which result ("Yes" or "No") is
displayed in the Data list No. 101: Normal End. (Refer to
Special Function (Teach-In Reference Table
).)
Q: Which is displayed, "Yes" or "No"?
"Yes" : Go to Step 4
"No" : DTC No. P181B: Carry out the troubleshooting for
the DTC No. P181B: Clutch 1 (Pressure low range
out). (Refer to
.)
STEP 4. Replace the clutch assembly, and check if the DTC
is reset.
(1) Replace the clutch assembly. (Refer to GROUP 22D
−Transaxle
(2) Drive with shifted in the 2nd gear.
(3) Check the DTC.
Q: Is DTC No.P1877 set?
YES : Replace the transaxle assembly. (Refer to
.)
NO : This diagnosis is complete.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-270
DTC P1878: Gear Block 3rd
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 gear engagement is
normal.
.
DESCRIPTIONS OF MONITOR METHODS
The engagement of the 3rd gear is determined to be
impossible.
.
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)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Check Conditions
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds
or more.
• Target gear: 3rd gear.
JUDGMENT CRITERIA
• Gear (synchro) engagement: 3 times blocked.
(immediately)
.
OBD-II DRIVE CYCLE PATTERN
The 3rd gear is engaged.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of TC-SST gear
• Malfunction of clutch assembly
AC710729
START
No
Good
Malfunction
END
Yes
Yes
Monitoring condition met
No
Gear (synchro) engagement
is 3 times blocked
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-271
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 whether the DTC is reset.
(1) Erase the DTC.
(2) Drive with shifted in the 3rd gear.
(3) Check that the DTC is reset.
Q: Is DTC No.P1878 set?
YES : Go to Step 3.
NO : Intermittent malfunction. (Refer to GROUP 00 − How
to Cope with Intermittent Malfunction
.)
STEP 3. Scan tool Teach-In
(1) Carry out the Item No.3: Line pressure Test. (Refer to
Special Function (Teach-In Reference Table
).)
(2) After Teach-In, check which result ("Yes" or "No") is
displayed in the Data list No. 101: Normal End. (Refer to
Special Function (Teach-In Reference Table
).)
Q: Which is displayed, "Yes" or "No"?
"Yes" : Go to Step 4
"No" : DTC No. P181B: Carry out the troubleshooting for
the DTC No. P181B: Clutch 1 (Pressure low range
out). (Refer to
.)
STEP 4. Replace the clutch assembly, and check if the DTC
is reset.
(1) Replace the clutch assembly. (Refer to GROUP 22D
−Transaxle
(2) Drive with shifted in the 3rd gear.
(3) Check the DTC.
Q: Is DTC No.P1878 set?
YES : Replace the transaxle assembly. (Refer to
.)
NO : This diagnosis is complete.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-272
DTC P1879: Gear Block 4th
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 gear engagement is
normal.
.
DESCRIPTIONS OF MONITOR METHODS
The engagement of the 4th gear is determined to be
impossible.
.
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)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
.
DTC SET CONDITIONS
Check Conditions
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds
or more.
• Target gear: 4th gear.
JUDGMENT CRITERIA
• Gear (synchro) engagement: 3 times blocked.
(immediately)
.
OBD-II DRIVE CYCLE PATTERN
The 4th gear is engaged.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of TC-SST gear
• Malfunction of clutch assembly
AC710729
START
No
Good
Malfunction
END
Yes
Yes
Monitoring condition met
No
Gear (synchro) engagement
is 3 times blocked
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