Mitsubishi Evolution X. Manual — part 454
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-273
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY>
Each value of failure condition 1 or failure condition 2
(Logic Flow Charts (Monitor Sequence) <Rational-
ity>) returns to the normal value and remains in the
state for 500 milliseconds.
.
LOGIC FLOW CHARTS (Monitor Sequence) <Rationality - plausibility failure>
.
AC710601
No
Yes
Malfunction
No
Yes
Monitoring condition met
No
Yes
Yes
Engine speed signal
status = not SNA
Continuous failure
for 250 msec
Input shaft speed*
1
> 12,800 r/min
START
END
Yes
|Input shaft speed*
1
| > (min(max(engine speed,
input shaft target speed [current gear]*
1
,
input shaft target speed [target gear]*
1
) + 3,000 r/min,
12,800 r/min)
Good
No
No
*
1
:In case of input shaft 1 (odd) speed sensor monitor, this is speed of input shaft (odd).
In case of input shaft 2 (even) speed sensor monitor, this is speed of input shaft (even).
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-274
DTC SET CONDITIONS
Check Conditions <Rationality plausibility fail-
ure>
• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
JUDGMENT CRITERIA <Rationality plausibility
failure>
• Input shaft 2 (even) speed: Refer to Logic Flow
Charts (Monitor Sequence) <Rationality plausibil-
ity failure>. (250 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY PLAUSIBILITY FAILURE>
The value of the Logic Flow Charts (Monitor
Sequence) <Rationality plausibility failure> returns to
the normal value and remains in the state for 250 mil-
liseconds.
.
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.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2766 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P2809: Clutch/Shift Changeover Solenoid 2, spool stuck
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/shift
changeover solenoid 2 is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The clutch/shift changeover solenoid 2 is determined
to be seized.
.
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)
• P2733: Clutch/shift switching solenoid 1, spool
stuck
• P2736: Clutch/shift switching solenoid 1 system
(Open circuit)
• P2738: Clutch/shift switching solenoid 1 system
(Short to ground)
• P2739: Clutch/shift switching solenoid 1 system
(Short to power supply)
• 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)
• P181E: Clutch 2 (Pressure low range out)
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-275
• P181F: Clutch 2 (Pressure high range out)
• P185B: Disengagement too late with clutch 2
Sensor (The sensor below is determined to be
normal)
• Clutch/shift switching solenoid 1
.
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 or more.
• Clutch/shift changeover solenoid 2: ON.
• Clutch cooling flow solenoid: OFF.
• Clutch/shift pressure solenoid 2: ON.
JUDGMENT CRITERIA
• Clutch 2 (even) pressure: 1,400 mbar or more, or
clutch 2 pressure sensor (even) change: 0, and
shift fork position sensor 3 and 4 change: 0. (200
millisecond)
.
AC710660
START
No
Good
Malfunction
END
Continuous failure
for 200 msec
No
Yes
Yes
Yes
No
Monitoring condition met
Clutch pressure
> 1,400 mbar
Yes
Yes
No
No
Clutch pressure
sensor change = 0
|Shift fork position
sensor change| = 0
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-276
OBD-II DRIVE CYCLE PATTERN
The status with the clutch 2 pressure 1,400 mbar or
less, or with the clutch 2 pressure sensor (even) and
shift fork position sensor 3 and 4 changed continues
for 200 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.
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P2809 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P2812: Clutch/Shift Changeover Solenoid 2 System (Open circuit)
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/shift
changeover solenoid 2 circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The clutch/shift changeover solenoid 2 circuit is
determined to be open.
.
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)
• P2733: Clutch/shift switching solenoid 1, spool
stuck
• P2736: Clutch/shift switching solenoid 1 system
(Open circuit)
• P2738: Clutch/shift switching solenoid 1 system
(Short to ground)
• P2739: Clutch/shift switching solenoid 1 system
(Short to power supply)
• P2809: Clutch/shift switching solenoid 2, spool
stuck
• P2814: Clutch/shift switching solenoid 2 system
(Short to ground)
• P2815: Clutch/shift switching solenoid 2 system
(Short to power supply)
• P181E: Clutch 2 (Pressure low range out)
• P181F: Clutch 2 (Pressure high range out)
• P185B: Disengagement too late with clutch 2
Sensor (The sensor below is determined to be
normal)
• Clutch/shift switching solenoid 1
.
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