Mitsubishi Evolution X. Manual — part 394
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-33
DTC P0746: Line Pressure 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 line pressure solenoid
is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The difference between the actual current of the line
pressure 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)
• P0960: Line pressure solenoid system (Open cir-
cuit)
• P0961: Line pressure solenoid system (Overvolt-
age)
• P0962: Line pressure solenoid system (Short to
ground)
• P0963: Line pressure solenoid system (Short to
power supply)
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence) <Rationality - high>
.
DTC SET CONDITIONS
Check Conditions <Rationality-high>
• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
JUDGMENT CRITERIA <Rationality-high>
• Calculated current (actual current − target cur-
rent): 500 mA or more. (1 second)
AC710625
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
Continuous failure
for 1 sec
No
Yes
Calculated current > 500 mA
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-34
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY-HIGH>
The value of the calculated current (actual current
−
target current) remains 500 mA or less for 1 second.
.
LOGIC FLOW CHARTS (Monitor Sequence) <Rationality - low>
.
DTC SET CONDITIONS
Check Conditions <Rationality-low>
• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
JUDGMENT CRITERIA <Rationality-low>
• Calculated current (target current − actual cur-
rent): 500 mA or more. (12 seconds)
.
OBD-II DRIVE CYCLE PATTERN
<RATIONALITY-LOW>
The value of the calculated current (target current
−
actual current) remains 500 mA or less for 12 sec-
onds.
.
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.
AC710626
START
No
Yes
Yes
Good
Malfunction
END
Monitoring condition met
No
Continuous failure
for 12 sec
No
Yes
Calculated current > 500 mA
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-35
STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P0746 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P0753: Shift Select Solenoid 1 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 select solenoid 1
circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The shift select solenoid 1 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)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
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-36
.
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. P0753 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P0758: Shift Select 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 shift select solenoid 2
circuit is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The shift select 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)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
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