Mitsubishi Evolution X. Manual - part 349

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-45

STEP 7. Check the wiring harness between C-04
combination meter connector terminal No. 4 and C-122
parking brake switch connector terminal No. 1.
Check that the wiring harness is not shorted (short to ground).
Q: Is the check result normal?

YES : Replace the combination meter. (Refer to GROUP

54A

− Combination Meter

P.54A-101

.) Then go to

Step 8.

NO : Repair the wiring harness. Then go to Step 8.

STEP 8. Check whether the DTC is reset.
Q: Is DTC No. C1614 set?

YES : Replace the AWC-ECU.(Refer to

P.22A-132

.) Then

go to Step 9.

NO : Intermittent malfunction. (Refer to GROUP 00

− How

to Cope with Intermittent Malfunction

P.00-15

STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C1614 set?

YES : Return to Step 1.
NO : This diagnosis is complete.

DTC C1615: Brake control prohibition request

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.

OPERATION

AWC-ECU receives brake control signal from
ASC-ECU via the CAN communication.

DTC SET CONDITIONS

The code is set when brake control prohibition
request is received from ASC-ECU.

PROBABLE CAUSES

• Malfunction of ASC-ECU

• Malfunction of AWC-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 3.
NO : Repair the CAN bus lines. (Refer to GROUP 54C

−

Troubleshooting

P.54C-14

.) After repairing the CAN

bus line, go to Step 2.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

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MANUAL TRANSAXLE

22A-46

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1615 set?

YES : Go to Step 3.
NO : This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check if the ASC diagnostic trouble code No. U0251, U0435,
or U0440 is set. (Refer to GROUP 35C

− Troubleshooting

P.35C-20

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 4.

STEP 4. Scan tool diagnostic trouble code
Check other AWC diagnostic trouble code.(Refer to

P.22A-11

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 5.

STEP 5. Check whether the DTC is reset.
Q: Is DTC No. C1615 set?

YES : Replace the AWC-ECU.(Refer to

P.22A-132

NO : Intermittent malfunction. (Refer to GROUP 00

− How

to Cope with Intermittent Malfunction

P.00-15

DTC C1616: Cranking Signal System (ON sticking)

IGNITION
SWITCH

ETACS-ECU

(FUSE )

ETACS-ECU

Cranking signal system circuit

AC708953AI

Connector: C-210

AC708972AU

Connector: C-315

ETACS-ECU

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

TSB Revision

MANUAL TRANSAXLE

22A-47

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.

OPERATION

AWC-ECU receives the signal of the ignition switch
from ETACS-ECU via CAN communication.

DTC SET CONDITIONS

The code is set when the cranking signal is set for
five seconds or more continuously while driving.

PROBABLE CAUSES

• Malfunction of the ETACS-ECU

• Ignition switch malfunction

• Damaged harness wires and connectors

• Malfunction of AWC-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 3.
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. C1616 set?

YES : Go to Step 3.
NO : This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code

• Check the KOS diagnostic trouble code. (Refer to GROUP

42B

− Troubleshooting

P.42B-20

• Check the WCM diagnostic trouble code. (Refer to GROUP

42C

− Troubleshooting

P.42C-14

• Check the ETACS diagnostic trouble code. (Refer to

GROUP 54A

− Troubleshooting

P.54A-582

Q: Is the DTC set?

YES : Perform the relevant troubleshooting.
NO : Go to Step 4.

DIAGNOSIS <S-AWC(SUPER ALL WHEEL CONTROL)>

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MANUAL TRANSAXLE

22A-48

STEP 4. Scan tool service data
Item 42: Ignition switch (Refer to Service Data Reference Table

P.22A-107

Q: Is the check result normal?

YES : Go to Step 9.
NO : Go to Step 5.

STEP 5. Ignition switch check
(1) Disconnect C-210 ignition switch connector, and check the

continuity between the terminals No. 1 and No. 5 at the
ignition switch side.

(2) Turn the ignition switch to the "ON" position.

OK: No continuity

Q: Is the check result normal?

YES : Go to Step 6.
NO : Replace the ignition switch. (Refer to GROUP 54A

−

Ignition Switch

P.54A-19

.) Then go to Step 10.

STEP 6. Ignition switch connector, ETACS-ECU connector
check: C-210, C-315
Q: Is the check result normal?

YES : Go to Step 7.
NO : Repair the defective connector. Then go to Step 10.

STEP 7. Check the wiring harness between C-210 ignition
switch connector terminal No. 5 and C-315 ETACS-ECU
connector terminal No. 7.
Check the wiring harness for short circuit (short to power sup-
ply).
Q: Is the check result normal?

YES : Go to Step 8.
NO : Repair the wiring harness. Then go to Step 10.

STEP 8. Scan tool service data
ETACS item No. 287: Starter switch (Refer to GROUP 54A

−

ETACS

P.54A-630

Q: Is the check result normal?

YES : Go to Step 9.
NO : Replace the ETACS-ECU. (Refer to GROUP 54A

−

ETACS-ECU

P.54A-676

.) Then go to Step 9.

STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C1616 set?