Mitsubishi Lancer (4A9 engine). Manual — part 124

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-158

10

AFS/ACL:SAS(CAN input)

Turn the steering wheel anticlockwise.

Displays nearly the
same value as the
steering wheel
operation angle (0

° to

720

°).

Turn the steering wheel clockwise.

Displays nearly the
same value as the
steering wheel
operation angle (0

° to −

720

°).

11

A/L:Hazard lamp SW (CAN
input)

Hazard warning lamp switch: OFF

OFF

Hazard warning lamp switch: ON

ON

12

AFS/ACL:SAS status (CAN
input)

When the steering wheel neutral position
is learned by the steering wheel sensor.

Normal

When the steering wheel neutral position
is not learned by the steering wheel
sensor.

No initialize

When the steering wheel sensor is
defective.

Fail
No ini. and Fail

22

A/L:Headlamp switch
(Dimmer)

Lighting switch: High beam position

OFF

Other than above

ON

24

AFS/ACL:Reverse gear
(CAN input)

When the shift lever or the selector lever is
in the position other than the reverse
position.

OFF

When the shift lever or the selector lever is
in the reverse position.

ON

25

Headlamp SW
position(CAN input)

When the column switch (lighting switch)
is in the OFF position.

OFF

When the column switch (lighting switch)
is in the position lamp position.

Position lamp

When the column switch (lighting switch)
is in the headlamp position.

ON

When the column switch (lighting switch)
is in the auto lamp position.

AUTO

26

AFS/ACL:Turn SW LH(CAN
input)

When the turn-signal lamp switch (LH) is
in the OFF position.

OFF

When the turn-signal lamp switch (LH) is
in the ON position.

ON

27

AFS/ACL:Turn SW
RH(CAN input)

When the turn-signal lamp switch (RH) is
in the OFF position.

OFF

When the turn-signal lamp switch (RH) is
in the ON position.

ON

28

Head lamp LO (CAN input) When the low-beam headlamps are OFF.

OFF

When the low-beam headlamps are ON.

ON

Item No. M.U.T.-III display

Condition

Normal condition

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-159

ACTUATOR TEST REFERENCE TABLE

M1540305300105

29

AFS/ACL:Head lamp HI
(CAN input

When the high-beam headlamps are OFF. OFF
When the high-beam headlamps are ON.

ON

30

A/L:H/L levelling system

−

Type 1

31

A/L:H/L levelling type

−

Static type (CAN)

32

AFS/ACL:AFS/ACL type
(CAN input)

−

Fix bending lamp

33

AFS/ACL:Parking brake
SW(CAN in)

When the parking brake lever is released.
(parking brake switch: OFF)

OFF

When the parking brake lever is pulled up.
(parking brake switch: ON)

ON

34

AFS/ACL:AFS OFF SW
(CAN output)

−

OFF (Not present)

35

AFS/ACL:Indicator (CAN
output)

When the AFS warning is not displayed.

OFF

When the AFS warning is displayed.

ON

50

AFS/ACL:Bending lamp
LH(CAN out)

When the bending lamp (LH) is OFF.

OFF

When the bending lamp (LH) is ON.

ON

51

AFS/ACL:Bending lamp
RH(CAN out)

When the bending lamp (RH) is OFF.

OFF

When the bending lamp (RH) is ON.

ON

52

A/L:Fail indicator (CAN
output)

When the headlamp automatic levelling
warning is not displayed.

OFF

When the headlamp automatic levelling
warning is displayed.

ON

56

A/L:Actuator output fail flag When the output voltage to the headlamp

automatic levelling motor is normal.

OFF

When the output voltage to the headlamp
automatic levelling motor is abnormal.

ON

57

A/L:HS power fail flag

When the output voltage to the height
sensor is normal.

OFF

When the output voltage to the height
sensor is abnormal.

ON

59

A/L:Rear HS signal fail flag When the signal voltage from the rear

height sensor is normal.

OFF

When the signal voltage from the rear
height sensor is abnormal.

ON

67

A/L:Actuator line voltage

Ignition switch: ON position

System voltage

68

A/L:Actuator output voltage Ignition switch: ON position

20% to 80% of system
voltage

69

A/L:Indicating voltage ratio

Ignition switch: ON position

0

− 100 %

Item No. M.U.T.-III display

Condition

Normal condition

Item No. Item name

Test item

Driven content

5

A/L:Actuator

Headlamp automatic
levelling motor

The headlamp automatic levelling motor
activates.

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-160

HEADLAMP AUTOMATIC LEVELLING-ECU TERMINAL VOLTAGE

M1540301900677

AC900372 AI

Connector No. C-14

Terminal
No.

Check items

Check condition

Normal condition

1

Bending lamp (RH) input

Headlamp switch: ON

System voltage

Headlamp switch: OFF

1 V or less

2

Earth

Always

1 V or less

3

Bending lamp (LH) input

Headlamp switch: ON

System voltage

Headlamp switch: OFF

1 V or less

4, 5

−

−

−

6

Headlamp levelling unit (RH) earth

Always

1 V or less

7

Headlamp levelling unit (LH) earth

Always

1 V or less

8, 9

−

−

−

10

Headlamp relay (LO) ON signal
(LH)

Headlamp: ON

System voltage

11

Headlamp relay (LO) ON signal
(RH)

Headlamp: ON

System voltage

12

ECU power supply (Ignition switch:
IG1)

Ignition switch: ON

System voltage

Ignition switch: OFF

1 V or less

13

Output to the headlamp levelling
unit (RH)

Ignition switch: ON

When the
levelling motor
is stopped

1 V or less

When the
levelling motor
is operating

16% to 84% of
system voltage

14

Output to the headlamp levelling
unit (LH)

Ignition switch: ON

When the
levelling motor
is stopped

1 V or less

When the
levelling motor
is operating

16% to 84% of
system voltage

15

−

−

−

16

Rear height sensor earth

Always

1 V or less

17

Input from the rear height sensor

Ignition switch: ON

0.5 to 4.5 V

18, 19

−

−

−

20

Rear height sensor power supply

Ignition switch: ON

5 V

21

−

Ignition switch: ON

5 V

22

CAN_L

−

−

23

CAN_H

−

−

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-161

ON-VEHICLE SERVICE

INITIALISATION OF HEADLAMP AUTOMATIC LEVELLING-ECU

M1540303300176

After the operation below is completed, initialise the
headlamp automatic levelling-ECU.

• The headlamp automatic levelling-ECU is

replaced.

• The rear height sensor is replaced or removed/

installed.

• The suspension related components are replaced

or removed/installed.

INITIALISATION PROCEDURE

Before the initialisation operation, check that the
diagnosis code No. B2511, B2512, B2514, B2516 is
not set to the headlamp automatic levelling-ECU. If it
is set, perform the troubleshooting before the initiali-
sation. (Refer to .)
1. Park the vehicle on a level surface.
2. If the fuel tank is not filled up, put weight in the

luggage compartment to make up for the fuel
shortage so that the weight will become 90% of
full-state weight or heavier. (0.8 kg per litter)

3. There should be no other load in the vehicle other

than driver or substituted weight of approximately
75 kg placed in driver's position.
NOTE: Remove any load from the vehicle (Vehi-
cle tool kit and spare wheel should not be
removed).

4. 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 ).

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

start up the engine.)

6. Select the M.U.T.-III screen menu as follows.

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

selection" screen.

(2) Select "Special function."
(3) Select "HS initial position clear."

7. The headlamp automatic levelling warning is

displayed on the multi information display in the
combination meter.

8. Select the M.U.T.-III screen menu as follows.

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

selection" screen.

(2) Select "Special function."
(3) Select "HS initial position learning."

9. The headlamp automatic levelling warning on the

multi information display in the combination meter
is not displayed.

10.The headlamp automatic levelling-ECU

initialisation is completed.

11.Perform the headlamp aiming (Refer to Headlamp

Aiming .)

OPERATION CHECK OF HEADLAMP AUTOMATIC LEVELLING

M1540303400010

With this inspection, it is simply checked that the
headlamp automatic levelling motor incorporated in
the headlamp assembly moves in accordance with
the vehicle posture.

INSPECTION PROCEDURE

1. Park the vehicle on a level surface.
2. Turn the ignition switch to "ON" position. (Do not

start up the engine.)

3. At the front or rear jack up point, raise the front

wheels or rear wheels off the earth.

4. Turn ON the headlamp switch.
5. When the front wheels are raised, the upward

headlamp beam is controlled with the control
value applicable to the present vehicle posture,
and the headlamp beam moves downward.

6. When the rear wheels are raised, the downward

headlamp beam is controlled with the control
value applicable to the present vehicle posture,
and the headlamp beam moves upward.

24

−

−

−

25

Headlamp levelling unit (RH) power
supply

Ignition switch: ON

System voltage

26

Headlamp levelling unit (LH) power
supply

Ignition switch: ON

System voltage

Terminal
No.

Check items

Check condition

Normal condition