Mitsubishi Evolution X. Manual — part 428
DIAGNOSIS <TC-SST>
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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-169
DTC SET CONDITIONS <FUNCTIONAL
CHECK - SHIFT FORK 3 REQUESTED
BUT SHIFT FORK 1 MOVEMENT>
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.
• Requested shift fork: Shift fork 3.
JUDGMENT CRITERIA
• Shift fork position: 6 mm (0.24 inch) [1st gear
side] or less, or
−6 mm (−0.24 inch) [reverse gear
side] or more, or 1.8 mm (0.071 inch) [neutral
position] or more and initialized fork position
−
shift fork 3 position: 2.5 mm (0.098 inch) or less.
(200 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - SHIFT FORK 3
REQUESTED BUT SHIFT FORK 1
MOVEMENT>
The status with the shift fork position 6 mm (0.24
inch) [1st gear side] or more, or with
−6 mm (−0.24
inch) [reverse gear side] or less, or with 1.8 mm
(0.071 inch) [neutral position] or less and with the ini-
tialized fork position
− shift fork 3 position 2.5 mm
(0.098 inch) or more continues for 200 milliseconds.
.
DIAGNOSIS <TC-SST>
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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-170
LOGIC FLOW CHARTS (Monitor Sequence)
<Functional check - shift fork 3 requested but shift fork 4 movement>
.
AC710713
START
No
Good
Malfunction
END
No
Yes
Yes
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Continuous failure
for 200 msec
Yes
Yes
No
No
Monitoring condition met
|Initialized fork position -
shift fork 3 position|
< 2.5 mm (0.098 inch)
Shift fork 4 position
4th gear side
Shift fork 4 position
< 6 mm (0.24 inch)
Shift fork 4 position
2nd gear side
Shift fork 4 position
> -6 mm (-0.24 inch)
No
Shift fork 4 position
neutral position
|Shift fork 4 position|
> 1.8 mm (0.071 inch)
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-171
DTC SET CONDITIONS <FUNCTIONAL
CHECK - SHIFT FORK 3 REQUESTED
BUT SHIFT FORK 4 MOVEMENT>
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.
• Requested shift fork: Shift fork 3.
JUDGMENT CRITERIA
• Shift fork position: 6 mm (0.24 inch) [4th gear
side] or less, or
−6 mm (−0.24 inch) [2nd gear side]
or more, or 1.8 mm (0.071 inch) [neutral position]
or more, and initialized fork position
− shift fork 3
position: 2.5 mm (0.098 inch) or less. (200 milli-
second)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - SHIFT FORK 3
REQUESTED BUT SHIFT FORK 4
MOVEMENT>
The status with the shift fork position 6 mm (0.24
inch) [4th gear side] or more, or with
−6 mm (−0.24
inch) [2nd gear side] or less, or with 1.8 mm (0.071
inch) [neutral position] or less and with the initialized
fork position
− shift fork 3 position 2.5 mm (0.098
inch) or more continues for 200 milliseconds.
.
PROBABLE CAUSES
• Malfunction of TC-SST-ECU
• Malfunction of TC-SST shift fork
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. P1844 set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P184B: Shift Fork 4 Malfunction
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 movement of the shift
fork 4 is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The movement of the shift fork 4 is determined to be
abnormal.
.
MONITOR EXECUTION
• Continuous
.
DIAGNOSIS <TC-SST>
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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-172
MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• P1844: Shift fork 3 malfunction
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence) <Functional check - blocked>
.
DTC SET CONDITIONS <FUNCTIONAL
CHECK - BLOCKED>
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.
• Common high side 1 voltage: 2.5 V or more.
• Common high side 3 voltage: 2.5 V or more.
JUDGMENT CRITERIA
•
• Shift fork operation time: Shift fork operation time
(threshold value) or more. (immediately)
• Shift fork operation time (threshold value): Equal
the maximum allowed time x Coefficient. (imme-
diately)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - BLOCKED>
The shift fork operation time is threshold value or
less.
.
AC710675
START
No
Good
Malfunction
END
Yes
Malfunction criteria met
Yes
Monitoring condition met
No
AC710827
Maximum allowed time (sec)
25
20
15
10
5
-40
-20
0
20
120
Fluid temperature [˚C (˚F)]
AB
1 Until completion of initial shift fork action
2 After completion of initial shift fork action
(-40)
(-4)
(32)
(68)
(248)
AC710826
1.5
4,000
8,000
16,000
Line pressure (mbar)
1.25
1
Coefficient
AB
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