Mitsubishi Lancer Evolution X. Manual - part 482

 

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Mitsubishi Lancer Evolution X. Manual - part 482

 

 

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

TSB Revision

MANUAL TRANSAXLE

22A-21

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 the relevant wheel speed sensor diagnostic trouble 

code No. C1011 <FL>, C101C <FR>, C1027 <RL>, or 
C1032 <RR> set?
YES : 
Go to Step 3.
NO :  This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C 
− Troubleshooting 

P.35C-22

.)

Q: Is the DTC set?

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

STEP 4. Scan tool service data
Check the service data of the relevant wheel speed sen-
sor.(Refer to 

P.22A-107

.)

• Item No.22: FL wheel speed sensor <FL>
• Item No.23: FL wheel speed sensor <FR>
• Item No.24: FL wheel speed sensor <RL>
• Item No.25: FL wheel speed sensor <RR>

Q: Is the check result normal?

YES : Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

NO :  Replace the AWC-ECU.(Refer to 

P.22A-133

.)

DTC C1014 <FL>, C101F <FR>, C102A <RL>, C1035 <RR>: Wheel speed sensor system 
(characteristics abnormality)

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 wheel speed data from 
ASC-ECU via the CAN communication.

.

DTC SET CONDITIONS

If one or more of the wheel speed is out of the range 
of the specified value, the diagnostic trouble code of 
the relevant wheel speed sensor is set.

.

PROBABLE CAUSES

• Malfunction of wheel speed sensor
• Damaged harness wires and connectors
• Malfunction of encoder for wheel speed detection
• Malfunction of ASC-ECU
• Malfunction of AWC-ECU

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

TSB Revision

MANUAL TRANSAXLE

22A-22

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 the relevant wheel speed sensor diagnostic trouble 

code No. C1014 <FL>, C101F <FR>, C102A <RL>, or 
C1035 <RR> set?
YES : 
Go to Step 3.
NO :  This diagnosis is complete.

STEP 3. Scan tool diagnostic trouble code
Check the ASC diagnostic trouble code. (Refer to GROUP 35C 
− Troubleshooting 

P.35C-22

.)

Q: Is the DTC set?

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

STEP 4. Scan tool service data
Check the service data of the relevant wheel speed sen-
sor.(Refer to 

P.22A-107

.)

• Item No.22: FL wheel speed sensor <FL>
• Item No.23: FL wheel speed sensor <FR>
• Item No.24: FL wheel speed sensor <RL>
• Item No.25: FL wheel speed sensor <RR>

Q: Is the check result normal?

YES : Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

NO :  Replace the AWC-ECU.(Refer to 

P.22A-133

.)

DTC C1078: Tire Turning 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.

.

OPERATION

AWC-ECU receives the wheel speed data from 
ASC-ECU via the CAN communication.

.

DTC SET CONDITIONS

The wheel speed is observed when the steering 
angle is in the neutral position, and the code is set 
when the wheel speed, which is more than the speci-
fied value, is detected.

.

PROBABLE CAUSES

• Tire with incorrect diameter equipped
• Improper tire pressure
• Malfunction of ASC-ECU
• Malfunction of AWC-ECU

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

TSB Revision

MANUAL TRANSAXLE

22A-23

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 line (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. C1078 set?

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

STEP 3. Check the tires
Check that the wheels/tires with the identical size are installed, 
and that each tire pressure is within the value specified on the 
tire pressure label.
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Install the wheels/tires with the identical size, or adjust 

the tire pressure. Then go to Step 5.

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

P.35C-22

.)

Q: Is the DTC set?

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

STEP 5. Scan tool service data
Check the following service data. (Refer to 

P.22A-107

.)

• Item No.22: FL wheel speed sensor <FL>
• Item No.23: FL wheel speed sensor <FR>
• Item No.24: FL wheel speed sensor <RL>
• Item No.25: FL wheel speed sensor <RR>

Q: Is the check result normal?

YES : Intermittent malfunction. (Refer to GROUP 00 − How 

to Cope with Intermittent Malfunction 

P.00-15

.)

NO :  Replace the AWC-ECU.(Refer to 

P.22A-133

.)

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

TSB Revision

MANUAL TRANSAXLE

22A-24

DTC C1219: Steering Wheel Sensor System (Faulty Signal)

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.

• When the steering wheel sensor is replaced, 

calibrate the steering wheel sensor (refer to 
GROUP 35C 
 On-vehicle Service 

P.35C-289

), 

and initialize the steering angle correction 
amount stored in AWC-ECU. (Item No.1: 
Steering angle correction amount initializa-
tion 

P.22A-114

.)

• 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-287

), and ini-

tialize the lateral/longitudinal acceleration 
correction amount stored in AWC-ECU. (Refer 
to item No.2: Lateral acceleration correction 
amount initialization, and No.3: Longitudinal 
acceleration correction amount initialization 

P.22A-114

.)

.

OPERATION

AWC-ECU receives steering wheel data from the 
steering wheel sensor via CAN communication.

.

DTC SET CONDITIONS

This diagnostic trouble code is set when the abnor-
mality below is detected:

• The tolerance of neutral position of steering 

wheel sensor exceeds the specified range.

• Abnormality in steering wheel sensor output 

value

• Abnormality is detected by a comparison of out-

put value from the steering wheel sensor with the 
output values from wheel speed sensor and G 
and yaw rate sensor.

.

PROBABLE CAUSES

• Improper installation of steering wheel sensor
• Malfunction of steering wheel sensor
• Malfunction of G and yaw rate sensor
• Malfunction of wheel speed sensor
• Malfunction of AWC-ECU
• Vehicle straight-ahead position and steering 

wheel neutral position is not matched.

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. C1219 set?

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

STEP 3. Scan tool diagnostic trouble code
Q: Is DTC No. C2205 set?

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

 

 

 

 

 

 

 

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