Mitsubishi Evolution X. Manual - part 350

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

TSB Revision

MANUAL TRANSAXLE

22A-49

STEP 10. Check whether the DTC is reset.
Q: Is DTC No. C1616 set?

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

DTC C1617: AWC CAN Main Data System (data not received)

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 various data from ECU via CAN 
communication.

.

DIAGNOSTIC TROUBLE CODE SET 
CONDITIONS

The code is set when the signal necessary for AWC 
control cannot be received.

.

PROBABLE CAUSES

• The CAN bus line is defective.

• Malfunction of engine control module

• Malfunction of ASC-ECU

• Malfunction of steering wheel sensor

• Malfunction of the ETACS-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.

STEP 2. Check whether the DTC is reset.
Q: Is DTC No. C1617 set?

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

STEP 3. Scan tool diagnostic trouble code
Check if the AWC-related DTC No. U0100, U0101, U0121, 
U0126, or U0141 is set.(Refer to 

P.22A-11

.)

Q: Is the DTC set?

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

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

TSB Revision

MANUAL TRANSAXLE

22A-50

STEP 4. Scan tool diagnostic trouble code

• Check the engine diagnostic trouble code. (Refer to 

GROUP 13A 

− Troubleshooting 

P.13A-44

.)

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

35C 

− Troubleshooting 

P.35C-20

.)

• 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 5.

STEP 5. Check whether the DTC is reset.
Q: Is DTC No. C1617 set?

YES : Replace the AWC-ECU.(Refer to 

P.22A-132

.) 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.
Q: Is DTC No. C1613 set?

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

DTC C1618: AWC CAN Local Data System (data not received)

.

G AND YAW RATE SENSOR POWER 
SUPPLY

Refer to 

P.22A-72

.

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.

• Do not drop the G and yaw rate sensor or sub-

ject it to a shock.

• When G and yaw rate sensor is replaced, cali-

brate G and yaw rate sensor (refer to GROUP 
35C 

− On-vehicle Service 

P.35C-266

), and ini-

tialize the lateral/longitudinal acceleration 
correction amount stored in AWC-ECU. (Refer 
to item No.10: Lateral acceleration correction 
amount initialization, and No. 11: Longitudinal 
acceleration correction amount initialization 

P.22A-113

.)

.

OPERATION

AWC-ECU receives various data from ASC-ECU, G 
and yaw rate sensor via the local CAN communica-
tion.

.

DTC SET CONDITIONS

The code is set when the signal necessary for AWC 
control cannot be received.

.

PROBABLE CAUSES

• The CAN bus line is defective.

• Malfunction of local CAN bus line

• Malfunction of ASC-ECU

• Malfunction of G and yaw rate sensor

• Malfunction of AWC-ECU

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

TSB Revision

MANUAL TRANSAXLE

22A-51

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. C1618 set?

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

STEP 3. Scan tool diagnostic trouble code
Check if the AWC diagnostic trouble code No. U1003 is 
set.(Refer to 

P.22A-11

.)

Q: Is the DTC set?

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

STEP 4. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C 
− Troubleshooting 

P.35C-20

.)

Q: Is the DTC set?

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

STEP 5. ASC-ECU connector, G and yaw rate sensor 
connector, AWC-ECU connector, intermediate connector, 
J/C (7) check: A-05, C-38, C-46, C-47, C-50
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the defective connector. Then go to Step 10.

STEP 6. Check the wiring harness between C-46 AWC-ECU 
connector terminal No. 9, 10 and C-38 G and yaw rate 
sensor connector terminal No. 2, 3, and between C-46 
AWC-ECU connector terminal No. 9, 10 and A-05 ASC-ECU 
connector terminal No. 18, 19.
Check the wiring harness for open and short circuit (to ground, 
to power supply, or line-to line).
Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the wiring harness. Then go to Step 9.

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

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MANUAL TRANSAXLE

22A-52

STEP 7. Scan tool service data
Check the following service data. (Refer to 

P.22A-107

.)

• Item No. 26: Yaw rate sensor

• Item No. 29: Lateral G sensor

• Item No. 31: Longitudinal G sensor

Q: Is the check result normal?

YES : Go to Step 9.
NO :  Go to Step 8.

STEP 8. Check the wiring harness between A-05 ASC-ECU 
connector terminal No. 22 and C-38 G and yaw rate sensor 
connector terminal No. 1, and between A-05 ASC-ECU 
connector terminal No. 29 and C-38 G and yaw rate sensor 
connector terminal No. 5.
Check the wiring harness for open or short circuit (short to 
ground).
Q: Is the check result normal?

YES : Replace the G and yaw rate sensor. (Refer to 

GROUP 35C 

− G and Yaw Rate Sensor 

P.35C-278

.) 

Then go to Step 9.

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

STEP 9. Check whether the DTC is reset.
Q: Is DTC No. C1618 set?

YES : Replace the AWC-ECU.(Refer to 

P.22A-132

.) Then 

go to Step 10.

NO :  Intermittent malfunction. (Refer to GROUP 00 

− How 

to Cope with Intermittent Malfunction 

P.00-15

.)

STEP 10. Check whether the DTC is reset.
Q: Is DTC No. C1618 set?

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