Mitsubishi Evolution X. Manual — part 405

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-77

DTC P1637: EEPROM System (DTC storing 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 EEPROM in TC-SST-ECU
is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The EEPROM writing data 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)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

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.

JUDGMENT CRITERIA

• Calculated checksum: Not equal the memorized

checksum.

.

OBD-II DRIVE CYCLE PATTERN

The calculated checksum corresponds with the
memorized checksum.

.

PROBABLE CAUSES

• Malfunction of TC-SST-ECU

AC710668

START

No

Good

Malfunction

END

Monitoring condition met

Yes

Yes

No

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-78

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

P.54C-14

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1637 set?

YES : Replace the TC-SST assembly. (Refer to

P.22C-341

.)

NO : Intermittent malfunction. (Refer to GROUP 00

− How

to Cope with Intermittent Malfunction

P.00-15

.)

DTC P1676: Coding incomplete

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 coding is normal.
(TC-SST-ECU is a local coding.)

.

DESCRIPTIONS OF MONITOR METHODS

The coding is determined to be abnormal. (This
abnormality occurs when the vehicle information has
been incorrectly written to TC-SST-ECU at a factory
before shipment.)

.

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

.

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-79

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Ignition switch: ON

JUDGMENT CRITERIA

• Coding state: Not programmed. (Immediately)

.

OBD-II DRIVE CYCLE PATTERN

The coding is completed.

.

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

P.54C-14

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. P1676 set?

YES : Replace the TC-SST assembly. (Refer to

P.22C-341

.)

NO : Intermittent malfunction. (Refer to GROUP 00

− How

to Cope with Intermittent Malfunction

P.00-15

.)

AC710730

START

No

Good

Malfunction

END

Yes

Yes

Monitoring condition met

No

Coding state =
not programmed

DIAGNOSIS <TC-SST>

TSB Revision

TWIN CLUTCH- SPORTRONIC SHIFT TRANSMISSION (TC-SST)

22C-80

DTC P1802: Shift Lever System (LIN communication 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 CAN back-up commu-
nication (LIN) is normal.

.

DESCRIPTIONS OF MONITOR METHODS

The CAN back-up communication is determined to
be abnormal.

.

CPU

SHIFT LEVER

TRANSAXLE ASSEMBLY

NOTE

: THE TERMINAL NUMBERS DESCRIBED

IN THE CIRCUIT DIAGRAM AGREE WITH
THE NUMBERS MARKED ON THE
TRANSAXLE ASSEMBLY CONNECTOR AND
HARNESS SIDE CONNECTOR.

LIN communication system circuit

AC708949AO

Connector: A-13

AC709137

Connector: B-107

AD

B-107 (B)

AC705170AM

Connector: C-27