Mitsubishi Evolution X. Manual — part 402
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-65
DTC P0967: Clutch Cooling Flow Solenoid System (Short to power supply)
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 circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The clutch cooling flow solenoid circuit is determined
to be short to power supply.
.
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)
• 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)
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
.
AC710638
START
No
Yes
Good
Malfunction
END
Monitoring condition met
Continuous failure
for 5 sec
No
Yes
No
Yes
FET* output
> Battery voltage - 2 V
*FET : Field Effect Transistor
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-66
DTC SET CONDITIONS
Check Conditions
• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
• Clutch cooling flow solenoid: OFF.
JUDGMENT CRITERIA
• FET (Field Effect Transistor) output: (Battery volt-
age
− 2 V) or more. (5 seconds)
.
OBD-II DRIVE CYCLE PATTERN
The FET channel output remains (Battery voltage
− 2
V) or less for 5 seconds.
.
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. P0967 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P0968: Shift/Cooling Changeover Solenoid 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 shift/cooling
changeover solenoid circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The shift/cooling changeover solenoid 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)
• P1852: Shift fork 1 or 2 opposite direction move-
ment
• P1855: Shift fork 3 or 4 opposite direction move-
ment
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-67
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.
(220 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
The FET channel output remains 1 V or less for 220
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. P0968 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
AC710653
START
No
Yes
Good
Malfunction
END
Monitoring condition met
Continuous failure
for 220 msec
No
Yes
No
Yes
FET* output > 1 V
*FET : Field Effect Transistor
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-68
DTC P0970: Shift/Cooling Changeover Solenoid System (Short to ground)
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/cooling
changeover solenoid circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The shift/cooling changeover solenoid circuit is
determined to be short to ground.
.
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)
• P1852: Shift fork 1 or 2 opposite direction move-
ment
• P1855: Shift fork 3 or 4 opposite direction move-
ment
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.
JUDGMENT CRITERIA
• FET (Field Effect Transistor) output: 100 mV or
less. (220 millisecond)
.
AC710654
START
No
Yes
Good
Malfunction
END
Monitoring condition met
Continuous failure
for 220 msec
No
Yes
No
Yes
Channel output < 100 mV
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