Mitsubishi Evolution X. Manual — part 437
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-205
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1867 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1868: High side 2 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 high side 2 circuit is
normal.
.
DESCRIPTIONS OF MONITOR METHODS
The high side 2 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)
• P0967: Clutch cooling flow solenoid system
(Short to power supply)
• P2718: Clutch/shift pressure solenoid 1 system
(Open circuit)
• P2719: Clutch/shift pressure solenoid 1 system
(Overcurrent)
• P2720: Clutch/shift pressure solenoid 1 system
(Short to ground)
• P2721: Clutch/shift pressure solenoid 1 system
(Short to power supply)
• 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)
• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)
• P1859: Disengagement too late with clutch 1
Sensor (The sensor below is determined to be
normal)
• Clutch cooling flow solenoid
• Clutch/shift pressure solenoid 1
• Clutch/shift switching solenoid 1
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-206
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.
• High side 2 switch: OFF.
JUDGMENT CRITERIA
• FET (Field Effect Transistor): Can’t be switched
off. (12 seconds)
.
OBD-II DRIVE CYCLE PATTERN
The FET switch remains OFF for 12 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.
AC710727
START
No
Good
Malfunction
END
Continuous failure
for 12 sec
No
Yes
Yes
Monitoring condition met
Yes
No
FET* can't switched off
*FET : Field Effect Transistor
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-207
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1868 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P186A: High side 3 system (Overcurrent)
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 high side 3 circuit is
normal.
.
DESCRIPTIONS OF MONITOR METHODS
The supply current to the high side 3 is determined to
be overcurrent.
.
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)
• P0753: Shift select solenoid 1 system (Open cir-
cuit)
• P0973: Shift select solenoid 1 system (Short to
ground)
• P0974: Shift select solenoid 1 system (Short to
power supply)
• P2727: Clutch/shift pressure solenoid 2 system
(Open circuit)
• P2728: Clutch/shift pressure solenoid 2 system
(Overcurrent)
• P2729: Clutch/shift pressure solenoid 2 system
(Short to ground)
• P2730: Clutch/shift pressure solenoid 2 system
(Short to power supply)
• P2809: Clutch/shift switching solenoid 2, spool
stuck
• 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)
• P181B: Clutch 1 (Pressure low range out)
• P181C: Clutch 1 (Pressure high range out)
• P1859: Disengagement too late with clutch 1
• 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)
• Shift select solenoid 1
• Clutch/shift pressure solenoid 2
• Clutch/shift switching solenoid 2
.
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-208
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.
• High side 3 switch: ON.
JUDGMENT CRITERIA
• FET (Field Effect Transistor) current: 8.1 A or
more, and FET (Field Effect Transistor) output:
100 mV or less. (1 second)
.
OBD-II DRIVE CYCLE PATTERN
The status with the current of the FET channel shunt
8.1 A or less and with the FET channel output 100
mV or more continues 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.
AC710725
START
No
Good
Malfunction
END
No
Yes
Yes
Yes
No
Monitoring condition met
FET* current > 8.1 A
Yes
No
FET* output < 100 mV
Continuous failure
for 1 sec
*FET : Field Effect Transistor
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