Mitsubishi Lancer Evolution X. Manual - part 538

 

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Mitsubishi Lancer Evolution X. Manual - part 538

 

 

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-109

DTC P181B: Clutch 1 (Pressure low 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 clutch 1 pressure is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The pressure of the clutch 1 is too low.

.

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)

• P0841: Clutch 1 pressure sensor system (Poor 

performance)

• P0842: Clutch 1 pressure sensor system (Output 

low range out)

• P0843: Clutch 1 pressure sensor system (Output 

high range out)

• P1836: Shift fork 1 malfunction
• P183D: Shift fork 2 malfunction

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor

.

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.
• Engine speed: 650 r/min or more.
• Time since above engine condition: 1.5 seconds 

or more.

AC710671

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for 5 sec

No

Yes

Yes

Yes

No

Calculated pressure > 2,000 mbar

AB

hPa

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-110

• Clutch 1 (odd) state: Slip or engaged.
• Clutch/shift pressure solenoid 1: Not OFF or not 

in valve cleaning mode.

JUDGMENT CRITERIA

• Calculated pressure: 2,000 hPa or more. (5 sec-

onds)

.

OBD-II DRIVE CYCLE PATTERN

The calculated pressure remains 2,000 hPa or less 
for 5 seconds. 

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU
• Insufficient fluid level
• Improper installation of mechatronic assembly

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

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.
(1) Erase the DTC.
(2) Carry out the Item No. 3 (Teach-In) : Line pressure Test. 

(Refer to Special Function (Teach-In Reference Table 

P.22C-365

).) 

(3) With the engine idle status, check that the DTC is reset.
Q: Is the DTC No. P181B restored? or Is the line pressure 

test of Teach-In not completed normally ("No" is 
displayed in the Data list No.101: Normal End)?
YES : 
Go to Step 3.
NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 3. Check the fluid.
Q: Is the fluid level proper?

YES : Go to Step 4
NO :  Add the fluid.

STEP 4. Check the installation status of the mechatronic 
assembly.
Q: Is the mechatronic assembly installed correctly?

YES : Go to Step 5
NO :  Install the mechatronic assembly correctly. (Refer to 

P.22C-421

.)

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-111

STEP 5. Check whether the DTC is reset.
(1) Erase the DTC.
(2) With the engine idle status, check that the DTC is reset.
Q: Is DTC No.P181B set?

YES : Replace the mechatronic assembly. (Refer to 

P.22C-421

.) Then, go to Step 6.

NO :  Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 6. Check whether the DTC is reset.
(1) Erase the DTC.
(2) With the engine idle status, check that the DTC is reset.
Q: Is DTC No.P181B set?

YES : Replace the transaxle assembly. (Refer to 

P.22C-412

.)

NO :  This diagnosis is complete.

DTC P181C: Clutch 1 (Pressure high 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 clutch 1 pressure is 
normal.

.

DESCRIPTIONS OF MONITOR METHODS

The pressure of the clutch 1 is too high.

.

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)

• P0841: Clutch 1 pressure sensor system (Poor 

performance)

• P0842: Clutch 1 pressure sensor system (Output 

low range out)

• P0843: Clutch 1 pressure sensor system (Output 

high range out)

• P1836: Shift fork 1 malfunction
• P183D: Shift fork 2 malfunction

Sensor (The sensor below is determined to be 

normal)

• Clutch 1 pressure sensor

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-112

LOGIC FLOW CHARTS (Monitor Sequence) <Target clutch 1 (odd) pressure: 3,000 hPa 
or more>

.

DTC SET CONDITIONS <TARGET 

CLUTCH 1 (ODD) PRESSURE: 3,000 HPA 

OR MORE>

Check Conditions

• Engine speed: 650 r/min or more.

• Time since above engine condition: 1.5 seconds 

or more.

• Clutch 1 (odd) state: Slip or engaged.
• Target clutch 1 (odd) pressure: 3,000 hPa or 

more.

AC805097

START

No

Good

Malfunction

END

Monitoring condition met

Continuous failure
for time required*

No

Yes

Yes

Yes

No

Calculated pressure
< -5,000 mbar

*: Time required
   The time required for the "Rationality-high" monitor depends on the transmission fluid temperature, 
   the shift lever position.

Example of the time required
i) When the shift lever position is P: The time required is always 220 msec.
ii) When the shift lever position is "R -> N":
   If the transmission fluid temperature is -10˚C (14˚F) or more, the time required is 1,220 msec.
   If the transmission fluid temperature is lower than -10˚C (14˚F), the time required is 2,220 msec.
iii) When shift lever position is D:
   If the transmission fluid temperature is -10˚C (14˚F) or less, the time required is 3,220 msec.
   If the transmission fluid temperature is higher than -10˚C (14˚F), the time required is 2,220 msec.

Shift lever position

Transmission fluid temperature

Time required

"D     N" or "R     N" or "R     P"

"N" or "P"

"R" or "D"

>= -10˚C (14˚F)

< -10˚C (14˚F)

<= -10˚C (14˚F)

> -10˚C (14˚F)

All range

1,220 msec

2,220 msec

220 msec

3,220 msec

2,220 msec

hPa

"R" or "D" or manual mode

AB

 

 

 

 

 

 

 

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