Mitsubishi Evolution X. Manual — part 395
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-37
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.
JUDGMENT CRITERIA
• FET (Field Effect Transistor) output: 1 V or more.
(1 second)
.
OBD-II DRIVE CYCLE PATTERN
The FET channel output remains 1 V or less for 1
second.
.
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. P0758 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
AC710622
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
Continuous failure
for 1 sec
No
Yes
FET* output > 1 V
*FET : Field Effect Transistor
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-38
DTC P0776: Clutch Cooling Flow Solenoid System (Drive current range out)
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 cooling flow
solenoid is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The difference between the actual current of the
clutch cooling flow solenoid and target current is
large.
.
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)
• P0777: Clutch cooling flow solenoid system
(Stuck)
• P0964: Clutch cooling flow solenoid system
(Open circuit)
• P0965: Clutch cooling flow solenoid system
(Overvoltage)
• P0966: Clutch cooling flow solenoid system
(Short to ground)
• P0967: Clutch cooling flow solenoid system
(Short to power supply)
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
.
AC710633
START
No
Yes
Good
Malfunction
END
Monitoring condition met
Continuous failure
for 1 sec
No
Yes
Yes
No
Calculated current
> 1,000 mA
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-39
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.
JUDGMENT CRITERIA <Rationality-high>
• Calculated current (actual current − target cur-
rent): 1,000 mA or more. (1 second)
JUDGMENT CRITERIA <Rationality-low>
• Calculated current (target current − actual cur-
rent): 1,000 mA or more. (1 second)
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY-HIGH>
The value of the calculated current (actual current
−
target current) remains 1,000 mA or less for 1 sec-
ond.
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY-LOW>
The value of the calculated current (target current
−
actual current) remains 1,000 mA or less for 1 sec-
ond.
.
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. P0776 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P0777: Clutch Cooling Flow Solenoid System (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 cooling flow
solenoid is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The clutch cooling flow solenoid 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)
• P0776: Clutch cooling flow solenoid system
(Drive current range out)
• P0964: Clutch cooling flow solenoid system
(Open circuit)
• P0965: Clutch cooling flow solenoid system
(Overvoltage)
• P0966: Clutch cooling flow solenoid system
(Short to ground)
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-40
• P0967: Clutch cooling flow solenoid system
(Short to power supply)
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
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 1 target pressure: 380 mbar or more.
• Clutch 2 target pressure: 380 mbar or more.
.
JUDGMENT CRITERIA
• Clutch 1 pressure: 100 mbar or less, and clutch 2
pressure: 100 mbar or less. (3 seconds)
.
OBD-II DRIVE CYCLE PATTERN
The Clutch 1 pressure and clutch 2 pressure remain
100 mbar or more for 3 seconds.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
AC710635
START
No
Yes
Good
Malfunction
END
Monitoring condition met
Continuous failure
for 3 sec
No
Yes
Yes
No
Clutch 2 pressure
< 100 mbar
Clutch 1 pressure
< 100 mbar
Yes
No
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