Mitsubishi Lancer (4A9 engine). Manual — part 121

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-146

DIAGNOSIS CODE PROCEDURES

Code No. B2510 Auto levelling initialization not completed

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
When the headlamp automatic levelling system ini-
tialization

*

is not implemented, the headlamp auto-

matic levelling system warning is displayed on the
multi information display and the code No. B2510 is
stored. When the headlamp automatic levelling sys-
tem initialization is completed, the code No. B2510 is
cleared automatically.
NOTE:

*

: When the height sensor related diagnosis

code (B2514 or B2516) or headlamp automatic level-
ling-ECU related diagnosis code (B2511 or B2512) is
set, initialization of the headlamp automatic levelling
system is impossible, therefore perform the trouble-
shooting for the diagnosis code that has been set
previously.

JUDGEMENT CRITERIA
Initialization of the headlamp automatic levelling sys-
tem is not completed.

PROBABLE CAUSES

• Headlamp automatic levelling system initializa-

tion not completed

• 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. M.U.T.-III diagnosis code
Check if the height sensor related diagnosis code
(B2514 or B2516) or the headlamp automatic level-
ling-ECU related diagnosis code (B2511 or B2512) is
set.

Q: Is the diagnosis code set?

YES :

Perform the troubleshooting of the

diagnosis code that has been set previously.

NO :

Go to Step 3.

STEP 3. Check whether the diagnosis code is
reset.
Initialize the headlamp automatic levelling system
and check the diagnosis code of the headlamp auto-
matic levelling-ECU.
(1) Initialize the headlamp automatic levelling

system. Refer to .

(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 ).

U0141

ETACS CAN time-out

U1415

Coding not completed/failed

U1417

Abnormality in coding data

Diagnosis
code No.

Diagnostic item

Reference page

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-147

Code No. B2513 Levelling actuator output error

CAUTION

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.

DIAGNOSTIC FUNCTION
If a trouble occurs in headlamp assembly (headlamp
levelling unit), headlamp automatic levelling system
warnings are displayed on the multi information dis-
play and code No. B2513 is stored.

JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU detects the
short-circuit of the signal line to the headlamp level-
ling unit for 1 second or longer continuously.

PROBABLE CAUSES

• Malfunction of headlamp assembly (headlamp

levelling unit)

• Malfunction of the headlamp automatic levelling-

ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-36 headlamp
assembly (LH) connector, C-14 headlamp
automatic levelling-ECU connector

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector.

STEP 2. Wiring harness check between the A-36
headlamp assembly (LH) connector terminal No.
6 and the C-14 headlamp automatic levelling-ECU
connector terminal No. 14

• Check the signal lines for short circuit.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the wiring harness.

STEP 3. Check whether the diagnosis code is
reset.

Q: Is diagnosis code No. B2513 set?

YES :

Go to Step 4.

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 ).

STEP 4. Connector check: A-52 headlamp
assembly (RH) connector

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the defective connector.

STEP 5. Wiring harness check between the A-52
headlamp assembly (RH) connector terminal No.
6 and the C-14 headlamp automatic levelling-ECU
connector terminal No. 13

• Check the signal lines for short circuit.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the wiring harness.

ACA00916

A-52 (B)

Connectors: A-36, A-52

A-36 (B)

AC

ACA00892

Connector: C-14 <LHD>

AS

ACA00895AR

Connector: C-14 <RHD>

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-148

STEP 6. Check whether the diagnosis code is
reset.

Q: Is diagnosis code No. B2513 set?

YES :

Go to Step 7.

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 ).

STEP 7. M.U.T.-III data list
(1) Disconnect the headlamp assembly (LH) and

(RH) connector.

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

position to "ON" position.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Replace the headlamp automatic levelling-
ECU.

STEP 8. Check the headlamp assembly (LH).
Check the headlamp assembly (LH) for internal fail-
ure.
(1) Disconnect the headlamp assembly (RH)

connector.

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

position to "ON" position.

(3) Perform the drive test using the M.U.T.-III. Refer

to .

Q: Is the check result normal?

YES :

Go to Step 9.

NO :

Replace the headlamp assembly (LH).

STEP 9. Check the headlamp assembly (RH).
Check the headlamp assembly (RH) for internal fail-
ure.
(1) Disconnect the headlamp assembly (LH)

connector.

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

position to "ON" position.

(3) Perform the drive test using the M.U.T.-III. Refer

to .

Q: Is the check result normal?

YES :

Replace the headlamp automatic levelling

ECU.

NO :

Replace the headlamp assembly (RH).

Code No. B2514 Height sensor power supply error

CAUTION

Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communica-
tion circuit are normal.

Item No.

Item name

Normal
condition

Item 68

A/L actuator
output voltage

Indicates the
voltage value of
system voltage
within the range
of 20 to 80%.

ACB01925

A-01 (GR)

Connector: A-01

AB

ACA00892

Connector: C-14 <LHD>

AS

HEADLAMP AUTOMATIC LEVELLING SYSTEM

CHASSIS ELECTRICAL

54A-149

DIAGNOSTIC FUNCTION
If a trouble occurs in height sensor, headlamp auto-
matic levelling system warnings are displayed on the
multi information display and code No. B2514 is
stored.

JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU detects the
power supply error of the height sensor (less than
4.2 V, or 5.8 V or more) for 1 second or longer contin-
uously.

PROBABLE CAUSES

• Malfunction of the rear height sensor

• Malfunction of the headlamp automatic levelling-

ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-01 connector
assembly connector, C-14 headlamp automatic
levelling-ECU connector

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector.

STEP 2. Voltage measurement at the A-01
connector assembly connector.
(1) Disconnect the connector, and measure at the

wiring harness-side connector.

(2) Turn the ignition switch to the ON position.
(3) Voltage between the A-01 connector assembly

connector terminal No. 2 and the body earth

OK: 5 V

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Go to Step 3.

STEP 3. Wiring harness check between the A-01
connector assembly connector terminal No. 2
and the C-14 headlamp automatic levelling-ECU
connector terminal No. 21.

• Check the power supply lines for short circuit.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the wiring harness.

ACA00895AR

Connector: C-14 <RHD>

AC801775BU

Connector: F-02 <LANCER SPORTBACK>

ACA00901AD

Connector: F-02 <LANCER>

ACB01884

AB

A-01
Connector assembly

AB