Mitsubishi Lancer (4A9 engine). Manual - part 125

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-162

HEADLAMP AUTOMATIC LEVELLING MOTOR DRIVE TEST

M1540302100306

With this inspection, the headlamp automatic level-
ling motor incorporated in the headlamp assembly is 
forcibly activated and checking the motor for normal 
operation is possible.

DRIVE TEST PROCEDURE (WHEN THE 
M.U.T.-III IS USED)

1. Connect the M.U.T.-III to the diagnosis connector 

(For how to connect the M.U.T.-III, refer to 
GROUP 00 

− Diagnosis function ).

2. Turn the ignition switch to "ON" position. (Do not 

start up the engine.)

3. Turn ON the headlamp switch.
4. Select the M.U.T.-III screen menu as follows.

(1) Select "AFS" displayed on the "System 

selection" screen.

(2) Select "Actuator test."
(3) Select "Levelling actuator."
(4) The headlamp beam moves downward if 

"20%" is set for the "Vehicle select" and 
upward if "80%" is set for the "Vehicle select".

5. The drive test is completed.

DRIVE TEST PROCEDURE (WHEN THE 
M.U.T.-III IS NOT USED)

1. Turn the hazard warning lamp switch to the ON 

position.

2. Within 10 seconds after turning the ignition switch 

from OFF to the ON position (do not start up the 
engine), turn the headlamp switch from OFF to 
ON 5 times repeatedly. When the operation is 
successfully completed, the headlamp automatic 
levelling warning is displayed on the multi 
information display in the combination meter. If 
not displayed, turn the ignition switch OFF and 
perform the operation again.

3. Within 30 seconds after the headlamp automatic 

levelling warning is displayed, turn the hazard 
warning lamp switch OFF.

4. The headlamp beam moves downward for 

approximately 3 seconds and upward for 3 
seconds. Then the beam returns to the position 
applicable to the present vehicle posture.

5. The drive test is completed. (The headlamp 

automatic levelling warning is not displayed.)

HEADLAMP AUTOMATIC LEVELLING-ECU REMOVAL AND INSTALLATION

M1540302300236

AC701271AC

1

4.5 ± 1.5 N·m

1

4.5 ± 1.5 N·m

<L. H. drive vehicles>

<R. H. drive vehicles>

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-163

HEIGHT SENSOR REMOVAL AND INSTALLATION

M1540302700416

<LANCER>

Removal Steps 

•

Glove box (Refer to GROUP 52A 

− 

Glove Box ) <L. H. drive vehicles> 
or Instrument lower panel (Refer to 
GROUP 52A 

− Instrument Lower 

Panel ) <R. H. drive vehicles>

1.

Headlamp automatic levelling-ECU

Post-installation operation
• Initialisation of headlamp automatic levelling-ECU (Refer 

to  .)

• Check the beam direction of the headlamp (Refer to 

Headlamp Aiming ).

ACB01896AB

9.5 ± 2.5 N·m

8.0 ± 2.0 N·m

1

Removal 

1.

Rear height sensor

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-164

<LANCER SPORTBACK>

INSPECTION

HEIGHT SENSOR CHECK

M1540302600312

REAR HEIGHT SENSOR CHECK

1. Disconnect the sensor connector and connect the 

special tool test harness (MB991658) as shown.

2. Turn the ignition switch to the ON position.
3. Measure the voltage of sensor connector terminal 

No. 2.

4. Check that voltages show the values described in 

the graph according to the sensor operation 
angle.

Post-installation operation
• Initialisation of headlamp automatic levelling-ECU (Refer 

to  .)

• Check the beam direction of the headlamp (Refer to 

Headlamp Aiming ).

ACB01897AB

9.5 ± 2.5 N·m

8.0 ± 2.0 N·m

1

Removal 

1.

Rear height sensor

AC809168

Harness 
side

Sensor side

AB

MB991658

AC611525

4.5

2.5

0.5

–60 –45 –30 –15

0

15

30

45

60

AC

(-) angle

(+) angle

Voltage (V)

Operation angle of sensor (degree)

Base point line 
of sensor
(0 degree point)

REAR COMBINATION LAMP

CHASSIS ELECTRICAL

54A-165

REAR COMBINATION LAMP

SPECIAL TOOLS

M1541400100269