Mitsubishi Lancer Evolution X. Manual - part 487

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

TSB Revision

MANUAL TRANSAXLE

22A-41

STEP 4. Wiring harness check between C-46 AWC-ECU 
connector terminal No. 11 and C-214 AWC switch 
connector terminal No. 2
Check that the wiring harness is not shorted (short to ground).
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. 90, 91: 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)>

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MANUAL TRANSAXLE

22A-42

DTC C1614: Parking Brake Switch System (Clogging ON)

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 parking brake switch signal 
from the combination meter via ETACS-ECU.

.

DTC SET CONDITIONS

If the parking brake switch is stuck on, the code is 
set.

.

PROBABLE CAUSES

• Parking brake switch malfunction
• Damaged harness wires and connectors
• Malfunction of the ETACS-ECU
• Malfunction of the combination meter
• Malfunction of AWC-ECU
• Driving with the parking brake pulled

INTERFACE
CIRCUIT

CPU

COMBINATION
METER

PARKING 
BRAKE 
SWITCH

Parking brake switch  system circuit

AC708950

Connector: C-04

AR

AC708951AN

C-23

C-122

Connectors: C-23, C-122

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

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MANUAL TRANSAXLE

22A-43

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. C1614 set?

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

STEP 3. Scan tool service data
Item 40: Parking brake 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 4.

STEP 4. Scan tool diagnostic trouble code

• Check whether the combination meter-related DTC is set. 

(Refer to GROUP 54A − Troubleshooting 

P.54A-32

.)

• Check the ETACS diagnostic trouble code. (Refer to 

GROUP 54A − Troubleshooting 

P.54A-646

.)

Q: Is the DTC set?

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

STEP 5. Check the parking brake switch as single unit.
Check the parking brake switch. (Refer to GROUP 36 − 

On-vehicle Service 

P.36-9

.)

Q: Is the check result normal?

YES : Go to Step 6.
NO :  Replace the parking brake switch. (Refer to GROUP 

36 − Parking Brake Lever 

P.36-10

.) Then go to Step 9.

STEP 6. Combination meter connector, intermediate 
connector, and parking brake switch connector check: 
C-04, C-23, C-122
Q: Is the check result normal?

YES : Go to Step 7.
NO :  Repair the defective connector. Then go to Step 9.

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

TSB Revision

MANUAL TRANSAXLE

22A-44

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-110

.) 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-133

.) 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-15

.) After repairing the CAN 

bus line, go to Step 2.