Mitsubishi Lancer Evolution X. Manual - part 206

 

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Mitsubishi Lancer Evolution X. Manual - part 206

 

 

ON-VEHICLE SERVICE

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-289

STEERING WHEEL SENSOR CALIBRATION

M1355009200156

<Vehicles without TC-SST>

CAUTION

After the next operation has been completed, carry out the 
following two operations:

• Alignment adjustment <Front>
• Steering wheel sensor (column switch assembly) 

replacement, removal, installation

• ASC-ECU replacement

1. Update the neutral position stored in the steering wheel 

sensor.

2. Reset the calibrated value of the steering angle stored 

in ASC-ECU.

CAUTION

• Before performing the calibration, check if the steering 

wheel sensor-related diagnostic trouble code is set in 
ASC-ECU.

• When the diagnostic trouble code other than C121A is 

set, carry out the inspection according to each trouble-
shooting procedure.

.

1. Park the vehicle on a level surface with tires and steering 

wheel positioned in a straight ahead direction.

2. Turn the ignition switch to the ON position.
3. Turn the ignition key to the LOCK (OFF) position.

CAUTION

Before connecting or disconnecting scan tool, always turn 
the ignition switch to the LOCK (OFF) position.
4. Check that the ignition key is in the LOCK (OFF) position, 

and then set scan tool.

5. Turn the ignition switch to the ON position.
6. On the Menu, select "System selection."
7. In "System table" of "System selection," select "Steering 

angle sensor," and then press the "OK" button.

8. In "Steering angle sensor," select "Special function."
9. In "Special function," select "Learn neutral position of 

steering angle sensor."
NOTE: When the neutral position of steering angle sensor 
has been learned, "Neutral position learned already: in order 
to relearn the neutral position, press the OK button to initial-
ize the steering angle sensor neutral position." is displayed. 
If it is okay, press the "OK" button.

10.In "Learn neutral position of steering angle sensor," 

"Initialize neutral position of steering angle sensor" is 
selected, thus press the "OK" button.
NOTE: When the neutral position of steering angle sensor 
has been learned, "Initialize neutral position of steering 
angle sensor: Do you want to execute? Note: The diagnostic 
trouble code will be erased." is displayed. Then, press the 
"OK" button.

ON-VEHICLE SERVICE

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-290

11."Initialize neutral position of steering angle sensor: 

Completed" is displayed. Then, press the "OK" button.

12.Press the "OK" button.
13."Learn neutral position of steering angle sensor: Do you 

want to execute? Note: Execute after the tires and steering 
wheel are aligned in a straight ahead direction." is displayed. 
Then, press the "OK" button.

14."Learn neutral position of steering angle sensor: Completed" 

is displayed. Then, press the "OK" button.

15.After turning the ignition switch to LOCK (OFF) position, turn 

it to the ON position again.

16.On the Menu, select "System selection."
17.On the "System selection," select "ABS/ASC/ASTC/WSS" in 

the "System table," and then click the "OK" button.

18. In the "ABS/ASC/ASTC/WSS" field, select "Special 

function".

19.In the "Special function," select "Learn sensor neutral 

position."

20.In "Learn sensor neutral position," select "Learn neutral 

position of steering angle sensor," and then press the "OK" 
button.

21."Learn neutral position of steering angle sensor: Are you 

sure to execute the selected item? Note: Check the 
execution conditions." is displayed. Then, press the "OK" 
button.

22."Execute command: Executed" is displayed. Then, press 

the "OK" button.

23.In the "ABS/ASC/ASTC/WSS" field, select "Self diagnosis." 

If diagnostic trouble code of "C2205 SAS internal error (past 
failure)" is set, erase it.

24.The neutral point is learned.
25.Turn the ignition key to the LOCK (OFF) position, and 

remove scan tool from the vehicle.

ON-VEHICLE SERVICE

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-291

<Vehicles with TC-SST>

CAUTION

After the next operation has been completed, carry out the 
following two operations:

• Alignment adjustment <Front>
• Steering wheel sensor (column switch assembly) 

replacement, removal, installation

• ASC-ECU replacement

1. Update the neutral position stored in the steering wheel 

sensor.

2. Reset the calibrated value of the steering angle stored 

in ASC-ECU.

3. Reset the calibrated value of the steering angle stored 

in AWC-ECU. <Only when replace of the steering wheel 
sensor, removal, or installation is performed.>

CAUTION

• Before performing the calibration, check if the steering 

wheel sensor-related diagnostic trouble code is set in 
ASC-ECU.

• When the diagnostic trouble code other than C121A is 

set, carry out the inspection according to each trouble-
shooting procedure.

.

<When ASC-ECU is replaced>

1. Park the vehicle on a level surface with tires and steering 

wheel positioned in a straight ahead direction.

2. Turn the ignition switch to the ON position.
3. Turn the ignition key to the LOCK (OFF) position.

CAUTION

Before connecting or disconnecting scan tool, always turn 
the ignition switch to the LOCK (OFF) position.
4. Check that the ignition key is in the LOCK (OFF) position, 

and then set scan tool.

5. Turn the ignition switch to the ON position.
6. On the Menu, select "System selection."
7. In "System table" of "System selection," select "Steering 

angle sensor," and then press the "OK" button.

8. In "Steering angle sensor," select "Special function."
9. In "Special function," select "Learn neutral position of 

steering angle sensor."
NOTE: When the neutral position of steering angle sensor 
has been learned, "Neutral position learned already: in order 
to relearn the neutral position, press the OK button to initial-
ize the steering angle sensor neutral position." is displayed. 
If it is okay, press the "OK" button.

10.In "Learn neutral position of steering angle sensor," 

"Initialize neutral position of steering angle sensor" is 
selected, thus press the "OK" button.

ON-VEHICLE SERVICE

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-292

NOTE: When the neutral position of steering angle sensor 
has been learned, "Initialize neutral position of steering 
angle sensor: Do you want to execute? Note: The diagnostic 
trouble code will be erased." is displayed. Then, press the 
"OK" button.

11."Initialize neutral position of steering angle sensor: 

Completed" is displayed. Then, press the "OK" button.

12.Press the "OK" button.
13."Learn neutral position of steering angle sensor: Do you 

want to execute? Note: Execute after the tires and steering 
wheel are aligned in a straight ahead direction." is displayed. 
Then, press the "OK" button.

14."Learn neutral position of steering angle sensor: Completed" 

is displayed. Then, press the "OK" button.

15.After turning the ignition switch to LOCK (OFF) position, turn 

it to the ON position again.

16.On the Menu, select "System selection."
17.On the "System selection," select "ABS/ASC/ASTC/WSS" in 

the "System table," and then click the "OK" button.

18. In the "ABS/ASC/ASTC/WSS" field, select "Special 

function".

19.In the "Special function," select "Learn sensor neutral 

position."

20.In "Learn sensor neutral position," select "Learn neutral 

position of steering angle sensor," and then press the "OK" 
button.

21."Learn neutral position of steering angle sensor: Are you 

sure to execute the selected item? Note: Check the 
execution conditions." is displayed. Then, press the "OK" 
button.

22."Execute command: Executed" is displayed. Then, press 

the "OK" button.

23.In the "ABS/ASC/ASTC/WSS" field, select "Self diagnosis." 

If diagnostic trouble code of "C2205 SAS internal error (past 
failure)" is set, erase it.

24.The neutral point is learned.
25.Turn the ignition key to the LOCK (OFF) position, and 

remove scan tool from the vehicle.

.

<When steering wheel sensor is replaced>

1. When the ASC-ECU has been changed, carry out the 

steering wheel sensor calibration procedures from Step 1− 

23.

2. On the Menu, select "System selection."
3. In "System table" of "System selection," select "ACD/AYC" 

and then press the "OK" button.

4. In "ACD/AYC" select "Special function."
5. In "Special function," select "Learn neutral position of 

steering angle sensor."

 

 

 

 

 

 

 

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