Mitsubishi Evolution X. Manual — part 430
DIAGNOSIS <TC-SST>
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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-177
DTC SET CONDITIONS <FUNCTIONAL
CHECK - SHIFT FORK 4 REQUESTED
BUT SHIFT FORK 2 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 4.
JUDGMENT CRITERIA
• Shift fork position: 6 mm (0.24 inch) [5th gear
side] or less, or
−6 mm (−0.24 inch) [3rd gear side]
or more, or 1.8 mm (0.071 inch) [neutral position]
or more, and Initialized fork position
− shift fork 4
position: 2.5 mm (0.098 inch) or less. (200 milli-
second)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - SHIFT FORK 4
REQUESTED BUT SHIFT FORK 2
MOVEMENT>
The status with the shift fork position 6 mm (0.24
inch) [5th gear side] or more, or with
−6 mm (−0.24
inch) [3rd gear side] or less, or with 1.8 mm (0.071
inch) [neutral position] or less and with the initialized
fork position
− shift fork 4 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-178
LOGIC FLOW CHARTS (Monitor Sequence)
<Functional check - shift fork 4 requested but shift fork 3 movement>
.
No
AC710717
START
No
Good
Malfunction
END
No
Yes
Yes
Yes
No
No
Yes
Monitoring condition met
Yes
No
|Shift fork 3 position|
> 1.8 mm (0.071 inch)
Yes
Shift fork 3 position
neutral position
Yes
No
|Initialized fork position -
shift fork 4 position|
< 2.5 mm (0.098 inch)
Shift fork 3 position
6th gear side
Shift fork 3 position
> -6 mm (-0.24 inch)
Continuous failure
for 200 msec
DIAGNOSIS <TC-SST>
TSB Revision
TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-179
DTC SET CONDITIONS <FUNCTIONAL
CHECK - SHIFT FORK 4 REQUESTED
BUT SHIFT FORK 3 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 4.
JUDGMENT CRITERIA
• Shift fork position: −6 mm (−0.24 inch) [6th gear
side] or more, or 1.8 mm (0.071 inch) [neutral
position] or more, and initialized fork position
−
shift fork 4 position: 2.5mm (0.098 inch) or less.
(200 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - SHIFT FORK 3
REQUESTED BUT SHIFT FORK 4
MOVEMENT>
The status of the shift fork position
−6 mm (−0.24 inch)
[6th 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 the DTC No. P184B set?
YES : Replace the TC-SST assembly. (Refer to
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
.)
DTC P1852: Shift Fork 1 or 2 opposite direction movement
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 is normal.
.
DESCRIPTIONS OF MONITOR METHODS
The movements of the shift fork 1 and 2 are deter-
mined to be abnormal.
.
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)
• P1836: Shift fork 1 malfunction
DIAGNOSIS <TC-SST>
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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)
22C-180
• P183D: Shift fork 2 malfunction
• P1844: Shift fork 3 malfunction
• P184B: Shift fork 4 malfunction
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
LOGIC FLOW CHARTS (Monitor Sequence)
<Functional check - move opposite direction right side>
.
DTC SET CONDITIONS <FUNCTIONAL
CHECK - MOVE OPPOSITE DIRECTION
RIGHT SIDE>
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.
• Shift fork 1 and 2 current gear: Neutral.
• Shift fork 1 and 2 target direction: 0 mm (0 inch)
or less.
JUDGMENT CRITERIA
• Shift fork 1 and 2 position: 1.8 mm (0.071 inch) or
more. (250 millisecond)
.
OBD-II DRIVE CYCLE PATTERN
<FUNCTIONAL CHECK - MOVE
OPPOSITE DIRECTION RIGHT SIDE>
The shift fork 1 and 2 positions remain 1.8 mm
(0.071 inch) or less for 250 milliseconds.
.
AC710720
START
No
Good
Malfunction
END
Continuous failure
for 250 msec
No
Yes
Yes
Monitoring condition met
Yes
No
Shift fork position
> 1.8 mm (0.071 inch)
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