Mitsubishi Lancer (4A9 engine). Manual — part 109

HEADLAMP

CHASSIS ELECTRICAL

54A-98

Code No.L0432 RLS RS adaptation error

DIAGNOSTIC FUNCTION
When the lighting control sensor is installed with the
wrong procedure, code No. L0432 is stored by LIN.

COMMENTS ON TROUBLE SYMPTOM
The lighting control sensor may have been installed
with the wrong procedure.

• Incorrect installation procedure: Connect the con-

nector before mounting the lighting control sensor
onto the optical coupler of the windshield.

• Correct installation procedure: Mount the lighting

control sensor onto the optical coupler of the
windshield. Wipe the windshield surface thor-
oughly, and check that the surface is dry. Then,
connect the connector.

PROBABLE CAUSES

• Lighting control sensor improperly installed

• Lighting control sensor (rain sensor) abnormal

operation

DIAGNOSIS PROCEDURE

STEP 1. Check whether the diagnosis code is
reset.
Disconnect the connector from the lighting control
sensor, and connect the connector to the lighting
control sensor again. Then, check again if the diag-
nosis code is set to LIN.
(1) Disconnect the connector of lighting control

sensor, and connect it again.
NOTE: When connecting the connector, follow
the correct installation procedure.

(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Go to Step 2.

NO :

The lighting control sensor is installed with
the wrong procedure.

STEP 2. Lighting control sensor installation
surface check
Visually check the presence of scratches or air bub-
bles (diameter of 5 mm or more) on the windshield to
which the lighting control sensor is installed. In addi-
tion, visually check that the optical coupler is not bro-
ken and that the lighting control sensor can be
installed.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the windshield (Refer to GROUP
42A

− Windshield )

STEP 3. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to LIN.
(1) Wipe the windshield surface of the lighting control

sensor section thoroughly, and check that the
surface is dry. Then, perform the lighting control
sensor (rain sensor) adaptation. <Refer to
GROUP 51

− Lighting Control Sensor (Rain

Sensor) Adaptation >.

(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Replace the lighting control sensor.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Code No.L0434 RLS light sensor error

Code No.L0436 RLS rain sensor error

DIAGNOSTIC FUNCTION
If a trouble occurs in the lighting control sensor, code
Nos. L0434 and L0436 are stored to LIN.

PROBABLE CAUSE
Malfunction of the lighting control sensor

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to LIN.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

HEADLAMP

CHASSIS ELECTRICAL

54A-99

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Replace the lighting control sensor.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Code No. B2358 AFS OFF SW short circuit

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
DIAGNOSTIC FUNCTION
If a trouble occurs in headlamp automatic levelling-
ECU, AFS warnings are displayed on the multi infor-
mation display and code No. B2358 is stored.

JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU detects an
internal circuit error.

PROBABLE CAUSE
Malfunction of the headlamp automatic levelling-
ECU

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to headlamp
automatic levelling-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(3) Check if diagnosis code is set after 60 seconds.

Q: Is the diagnosis code set?

YES :

Replace the headlamp automatic levelling-

ECU.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Code No. B2507 Steering wheel sensor error

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnosis code may be set. Prior
to this diagnosis, always diagnose the CAN
bus lines.

• Before replacing the ECU, ensure that the

power supply circuit, the earth circuit and the
communication circuit are normal.

DIAGNOSTIC FUNCTION
If a trouble of the steering wheel sensor occurs or the
neutral position is not learned, AFS warnings are dis-
played on the multi information display and the code
No. B2507 is stored.

JUDGEMENT CRITERIA
The internal error or the neutral position not learned
signal is received from the steering wheel sensor for
2 seconds continuously.

PROBABLE CAUSES

• Malfunction of the steering wheel sensor

• Steering wheel sensor neutral position not

learned

• Malfunction of the headlamp automatic levelling-

ECU.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES (vehicles with ASC) :

Go to Step 2.

YES (vehicles without ASC) :

Go to Step 3.

NO :

Repair the CAN bus line (Refer to GROUP
54C

− Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code is set to the steering wheel
sensor.

Q: Is the diagnosis code set?

HEADLAMP

CHASSIS ELECTRICAL

54A-100

YES :

Troubleshoot the steering wheel sensor.

Refer to GROUP 35C

− Troubleshooting .

NO :

Go to Step 5.

STEP 3. Check whether the diagnosis code is
reset.
When the steering wheel sensor neutral position has
been learned, check if the diagnosis code is set to
headlamp automatic levelling-ECU.
(1) When the steering wheel sensor neutral position

has been initialised, make the sensor learn the
neutral point. Refer to GROUP 35C

− On-vehicle

service .

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(4) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Go to Step 4.

NO :

The diagnosis is complete.

STEP 4. M.U.T.-III data list
Turn the steering wheel.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Replace the steering wheel sensor.

STEP 5. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to headlamp
automatic levelling-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Replace the headlamp automatic levelling-

ECU.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Code No. B2509 Steering wheel sensor not initialized

CAUTION

• If there is any problem in the CAN bus lines,

an incorrect diagnosis code may be set. Prior
to this diagnosis, always diagnose the CAN
bus lines.

• Before replacing the ECU, ensure that the

power supply circuit, the earth circuit and the
communication circuit are normal.

DIAGNOSTIC FUNCTION
If a trouble of the steering wheel sensor occurs or the
neutral position is not learned, AFS warnings are dis-
played on the multi information display and the code

No. B2509 is stored. When the neutral position of the
steering wheel sensor is learned, the code No.
B2509 is cleared automatically.

JUDGEMENT CRITERIA
The neutral position not learned signal is received
from the steering wheel sensor for 2 seconds contin-
uously.

PROBABLE CAUSES

• Malfunction of the steering wheel sensor

• Steering wheel sensor neutral position not

learned

Item No.

Item name

Normal
condition

Item 5

Steering angle
(CAN input)

The display on
M.U.T.-III
changes
together with
the steering
wheel
operation.

Item 7

SAS status
(CAN input)

Normal

HEADLAMP

CHASSIS ELECTRICAL

54A-101

• Malfunction of the headlamp automatic levelling-

ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the CAN bus line (Refer to GROUP
54C

− Troubleshooting ).

STEP 2. Check whether the diagnosis code is
reset.
When the steering wheel sensor neutral position has
been learned, check if the diagnosis code is set to
headlamp automatic levelling-ECU.
(1) When the steering wheel sensor neutral position

has been initialised, make the sensor learn the
neutral point. Refer to GROUP 35C

− On-vehicle

service .

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(4) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Go to Step 3.

NO :

The diagnosis is complete.

STEP 3. M.U.T.-III data list
Turn the steering wheel.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Replace the steering wheel sensor.

STEP 4. Check whether the diagnosis code is
reset.
Check again if the diagnosis code is set to headlamp
automatic levelling-ECU.
(1) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(2) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Replace the headlamp automatic levelling-

ECU.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Code No. B2511 ECU internal error (ROM)

CAUTION

Before replacing the ECU, ensure that the power
supply circuit, the earth circuit and the communi-
cation circuit are normal.
DIAGNOSTIC FUNCTION
If a trouble occurs in headlamp automatic levelling-
ECU, AFS or headlamp automatic levelling system
warnings are displayed on the multi information dis-
play and code No. B2511 is stored.

JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU detects a
ROM data error.

PROBABLE CAUSE
Malfunction of the headlamp automatic levelling-
ECU

DIAGNOSIS PROCEDURE

Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to headlamp
automatic levelling-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF)

position to "ON" position.

(3) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES :

Replace the headlamp automatic levelling-

ECU.

NO :

The trouble can be an intermittent
malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

Item No.

Item name

Normal
condition

Item 7

SAS status
(CAN input)

Normal