Mitsubishi Lancer Evolution X. Manual — part 557

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-185

DTC P1835: Shift Fork Position Sensor 4 System (Poor performance)

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 fork position sen-
sor 4 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The shift fork position sensor 4 is determined 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)

• P1831: Shift fork position sensor 4 system (Volt-

age low range out)

• P1832: Shift fork position sensor 4 system (Volt-

age high range out)

• P1833: Shift fork position sensor 4 system (Out-

put range out)

• P1834: Shift fork position sensor 4 system (Neu-

tral)

• P184B: Shift fork 4 malfunction
• P1852: Shift fork 1 or 2 opposite direction move-

ment

• P1855: Shift fork 3 or 4 opposite direction move-

ment

• P1858: Even number gear axle interlock
• P1876: Gear block 1st
• P1877: Gear block 2nd
• P1878: Gear block 3rd
• P1879: Gear block 4th
• P187A: Gear block 5th
• P187B: Gear block 6th
• P187C: Gear block reverse

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-186

LOGIC FLOW CHARTS (Monitor Sequence) <Shift fork 4 current gear: 4th gear>

.

DTC SET CONDITIONS <SHIFT FORK 4
CURRENT GEAR: 4TH GEAR>

Check Conditions

• Voltage of battery: 8 V or more.
• Voltage of battery: 16.5 V or less.
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds

or more.

• Input shaft 2 (even) speed: 500 r/min or more.
• Shift fork 4 current gear: 4th gear.

• Clutch 2 (even) transmit torque: 40 N⋅ m (30 ft-lb)

or more.

• Requested shift fork: Not shift fork 4.

JUDGMENT CRITERIA

• Shift fork 4 position: 6 mm (0.24 inch) or less.

(250 millisecond)

.

OBD-II DRIVE CYCLE PATTERN <SHIFT
FORK 2 CURRENT GEAR: 4TH GEAR>

The travel distance of the shift fork 4 remains 6 mm
(0.24 inch) or more for 250 millisecond.

.

AC710682

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 250 msec

No

Yes

Yes

Yes

No

Shift fork position
< 6 mm (0.24 inch)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-187

LOGIC FLOW CHARTS (Monitor Sequence) <Shift fork 4 current gear: 2nd gear>

.

DTC SET CONDITIONS <SHIFT FORK 4
CURRENT GEAR: 2ND GEAR>

Check Conditions

• Voltage of battery: 8 volts or more.
• Voltage of battery: 16.5 volts or less.
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 second or

more.

• Input shaft 2 (even) speed: 500 r/min or more.
• Shift fork 4 current gear: 2nd gear.
• Clutch 2 (even) transmit torque: 40 N⋅ m (30 ft-lb)

or more.

• Requested shift fork: not shift fork 4.

JUDGMENT CRITERIA

• Shift fork 4 position: − 6 mm (− 0.24 in) or more.

(250 millisecond)

.

OBD-II DRIVE CYCLE PATTERN <SHIFT
FORK 2 CURRENT GEAR: 3RD GEAR>

The travel distance of the shift fork 4 remains − 6 mm

(− 0.24 inch) or less for 250 milliseconds.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Malfunction of shift fork position sensor 4

DIAGNOSTIC PROCEDURE

Required Special Tools:

• MB991958 Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)
• MB991827 M.U.T.-III USB Cable
• MB991910 M.U.T.-III Main Harness A

AC710683

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 250 msec

No

Yes

Yes

Yes

No

Shift fork position
> -6 mm (-0.24 inch)

DIAGNOSIS <TC-SST>

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TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-188

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

P.54C-15

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
After driving in the 4th gear, check that the DTC is reset.
Q: Is DTC No. P1835 set?

YES : Go to Step 3.
NO : Intermittent malfunction. (Refer to GROUP 00 − How

to Cope with Intermittent Malfunction

P.00-15

.)

STEP 3. Scan tool Teach-In
(1) Carry out the Item No. 1: Plausibility check. (Refer to

Special Function (Teach-In Reference Table

P.22C-365

).)

(2) After Teach-In, check which result ("Yes" or "No") is

displayed in the Data list No. 101: Normal End. (Refer to
Special Function (Teach-In Reference Table

P.22C-365

).)

Q: Which is displayed, "Yes" or "No"?

"Yes" : Replace the transaxle assembly. (Refer to

P.22C-412

.)

"No" : Go to Step 4.

STEP 4. Replace the mechatronic assembly, and check if
the DTC is reset.
(1) Replace the mechatronic assembly. (Refer to

P.22C-421

.)

(2) Drive in the 4th gear.
(3) Check the DTC.
Q: Is DTC No.P1835 set?

YES : Replace the transaxle assembly. (Refer to

P.22C-412

.)

NO : This diagnosis is complete.

DTC P1836: Shift Fork 1 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 1 is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The movement of the shift fork 1 is determined to be
abnormal.

.

MONITOR EXECUTION

• Continuous

.