Mitsubishi Lancer Evolution X. Manual — part 486

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

TSB Revision

MANUAL TRANSAXLE

22A-37

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 controls the driving mode by the infor-

mation from AWC switch.

• AWC-ECU sends AWC control mode to the com-

bination meter via ETACS-ECU.

.

DTC SET CONDITIONS

If the AWC switch is stuck on, the code is set.

.

PROBABLE CAUSES

• AWC 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-15

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1613 set?

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

AC708950CH

C-42

Connectors: C-42, C-46

C-46

AC708951CH

Connector: C-120

AC708972BI

Connectors: C-309, C-317

C-309 (B)

C-317

ETACS-ECU

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

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MANUAL TRANSAXLE

22A-38

STEP 3. Intermediate connector, AWC-ECU connector,
AWC switch connector check: C-42, C-46, C-120
Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair the defective connector. Then go to Step 8.

STEP 4. Wiring harness check between C-46 AWC-ECU
connector terminal No. 21 and C-120 AWC switch
connector terminal No. 1
Check the wiring harness for short circuit (short to power sup-
ply).
Q: Is the check result normal?

YES : Go to Step 5.
NO : Repair the wiring harness. Then go to Step 8.

STEP 5. Scan tool service data
Item No. 89: AWC switch (Refer to service data reference table

P.22A-107

.)

Q: Is the check result normal?

YES : Go to Step 7.
NO : Go to Step 6.

STEP 6. AWC switch single unit check
Check the AWC switch. (Refer to

P.22A-134

.)

Q: Is the check result normal?

YES : Go to Step 7.
NO : Replace the AWC switch.(Refer to

P.22A-133

.) Then

go to Step 8.

STEP 7. Check whether the DTC is reset.
Q: Is DTC No. C1613 set?

YES : Replace the AWC-ECU. (Refer to

P.22A-133

.) Then

go to Step 8.

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

to Cope with Intermittent Malfunction

P.00-15

.)

STEP 8. Check whether the DTC is reset.
Q: Is DTC No. C1613 set?

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

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

TSB Revision

MANUAL TRANSAXLE

22A-39

DTC C1613: AWC Mode Select Switch System (Clogging) <Vehicles without steering audio remote
control switch >

AC902088

AWC SWITCH

AWC-ECU

CLOCK
SPRING

AWC mode select switch system circuit

AB

AC708951CJ

Connector: C-31

C-31 (B)

AC708950CL

C-41

C-46

Connectors: C-41, C-46

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

TSB Revision

MANUAL TRANSAXLE

22A-40

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 controls the driving mode by the infor-

mation from AWC switch.

• AWC-ECU sends AWC control mode to the com-

bination meter via ETACS-ECU.

.

DTC SET CONDITIONS

If the AWC switch is stuck on, the code is set.

.

PROBABLE CAUSES

• AWC 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-15

.) After repairing the CAN

bus line, go to Step 2.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1613 set?

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

STEP 3. AWC-ECU connector, intermediate connector,
clock spring connector, AWC switch connector check:
C-46, C-31, C-41, C-202, C-205, C-214
Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair the defective connector. Then go to Step 8.

AC708953AJ

Connectors: C-202, C-205, C-214

C-205

C-202

C-214 (R)