Mitsubishi Lancer (4A9 engine). Manual — part 122
HEADLAMP AUTOMATIC LEVELLING SYSTEM
CHASSIS ELECTRICAL
54A-150
STEP 4. Check whether the diagnosis code is
reset.
Q: Is diagnosis code No. B2514 set?
YES :
Go to Step 5.
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to cope with Intermittent
Malfunctions ).
STEP 5. Connector check: F-02 rear height
sensor connector, C-14 headlamp automatic
levelling-ECU connector
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Repair the defective connector.
STEP 6. Voltage measurement at the F-02 rear
height sensor 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 F-02 rear height sensor
connector terminal No. 1 and the body earth
OK: 5 V
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 7.
STEP 7. Wiring harness check between the F-02
rear height sensor connector terminal No. 1 and
the C-14 headlamp automatic levelling-ECU
connector terminal No. 20.
NOTE: Before the wiring harness check, check the
intermediate connectors C-67, D-12 and F-03, and
then repair that if necessary.
• Check the power supply lines for short circuit.
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Repair the wiring harness.
STEP 8. Check whether the diagnosis code is
reset.
Q: Is diagnosis code No. B2514 set?
YES :
Go to Step 9.
NO :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to cope with Intermittent
Malfunctions ).
STEP 9. M.U.T.-III data list
Disconnect the front and rear height sensor connec-
tor, and check the power supply voltage to the height
sensor.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Replace the headlamp automatic levelling-
ECU.
STEP 10. Rear height sensor check
Check the rear height sensor for the internal failure.
(1) Disconnect the rear height 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. 1.
OK: 5 V
Q: Is the check result normal?
YES :
Go to Step 11.
NO :
Replace the rear height sensor.
STEP 11. Check whether the diagnosis code is
reset.
Q: Is diagnosis code No. B2514 set?
YES :
Replace the headlamp automatic levelling-
ECU.
NO :
The diagnosis is complete.
Item No.
Item name
Normal
condition
Item 3
HS power
supply voltage
5 V
AC900275
Harness
side
Sensor side
AB
MB991658
HEADLAMP AUTOMATIC LEVELLING SYSTEM
CHASSIS ELECTRICAL
54A-151
Code No. B2516 Rear height sensor signal 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 rear height sensor, headlamp
automatic levelling system warnings are displayed
on the multi information display and code No. B2516
is stored.
JUDGEMENT CRITERIA
The headlamp automatic levelling-ECU detects the
error of the signal voltage from the rear height sensor
(less than 0.7 V, or 4.2 V or more) or 1 second or
longer continuously.
PROBABLE CAUSES
• Malfunction of the rear height sensor
• Malfunction of the rear height sensor installation
• Malfunction of the headlamp automatic levelling-
ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Check if diagnosis code No. B2514 is set.
Q: Is diagnosis code No. B2514 set?
YES :
Perform the troubleshooting of the
diagnosis code No. B2514.
NO :
Go to Step 2.
STEP 2. Rear height sensor installation status
check
Check that the rear height sensor is installed prop-
erly.
Q: Is the check result normal?
YES :
Go to Step 3.
NO :
Install the rear height sensor properly.
STEP 3. Connector check: F-02 rear height
sensor connector, C-14 headlamp automatic
levelling-ECU connector
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Repair the defective connector.
STEP 4. Voltage measurement at the F-02 rear
height sensor 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 F-02 rear height sensor
ACA00892
Connector: C-14 <LHD>
AS
ACA00895AR
Connector: C-14 <RHD>
AC801775BU
Connector: F-02 <LANCER SPORTBACK>
ACA00901AD
Connector: F-02 <LANCER>
HEADLAMP AUTOMATIC LEVELLING SYSTEM
CHASSIS ELECTRICAL
54A-152
terminal No. 1 and the body earth
OK: 5 V
Q: Is the check result normal?
YES :
Go to Step 6.
NO :
Go to Step 5.
STEP 5. Wiring harness check between the F-02
rear height sensor connector terminal No. 1 and
the C-14 headlamp automatic levelling-ECU
connector terminal No. 20.
NOTE: Before the wiring harness check, check the
intermediate connectors C-67, D-12 and F-03, and
repair that if necessary.
• Check the power supply line for open circuit.
Q: Is the check result normal?
YES :
Replace the headlamp automatic levelling-
ECU
NO :
Repair the wiring harness.
STEP 6. Resistance measurement at the F-02 rear
height sensor connector.
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the F-02 rear
height sensor connector terminal No. 3 and the
body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 8.
NO :
Go to Step 7.
STEP 7. Wiring harness check between the F-02
rear height sensor connector terminal No. 3 and
the C-14 headlamp automatic levelling-ECU
connector terminal No. 16.
NOTE: Before the wiring harness check, check the
intermediate connectors C-31, D-12 and F-03, and
repair that if necessary.
• Check the earth line for open circuit.
Q: Is the check result normal?
YES :
Replace the headlamp automatic levelling-
ECU
NO :
Repair the wiring harness.
STEP 8. Wiring harness check between the F-02
rear height sensor connector terminal No. 2 and
the C-14 headlamp automatic levelling-ECU
connector terminal No. 17.
NOTE: Before the wiring harness check, check the
intermediate connectors C-31, D-12 and F-03, and
repair that if necessary.
• Check the signal lines for open or short circuit.
Q: Is the check result normal?
YES :
Go to Step 9.
NO :
Repair the wiring harness.
STEP 9. rear height sensor check
Check that the rear height sensor is normal (Refer to
).
Q: Is the check result normal?
YES :
Go to Step 10.
NO :
Replace the rear height sensor.
STEP 10. M.U.T.-III data list
Check the rear height sensor for the signal voltage.
OK: Normal condition is displayed.
Q: Is the check result normal?
YES :
The trouble can be an intermittent
malfunction (Refer to GROUP 00
− How to
use Troubleshooting/inspection Service
Points
− How to cope with Intermittent
Malfunctions ).
NO :
Replace the headlamp automatic levelling-
ECU.
Item No.
Item name
Normal
condition
Item 5
Rear HS signal
voltage
0.7 V
− 4.1 V
HEADLAMP AUTOMATIC LEVELLING SYSTEM
CHASSIS ELECTRICAL
54A-153
TROUBLE SYMPTOM CHART
M1540301200300
CAUTION
Before or after the troubleshooting, check the operation of the headlamp automatic levelling system.
Refer to .
SYMPTOM PROCEDURES
Inspection Procedure 1: Malfunction of the power supply circuit system of headlamp automatic
levelling-ECU
CAUTION
Whenever the ECU is replaced, ensure that the
power supply circuit, the earth circuit and the
communication circuit are normal.
COMMENTS ON TROUBLE SYMPTOM
If the headlamp automatic levelling system or AFS
functions do not work at all, the headlamp automatic
levelling-ECU power supply system, earth system, or
headlamp automatic levelling-ECU may have a prob-
lem.
PROBABLE CAUSES
• Malfunction of the headlamp automatic levelling-
ECU
• Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Connector check: 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. Resistance measurement at the C-14
headlamp automatic levelling-ECU connector
(1) Disconnect the connector, and measure at the
wiring harness side.
(2) Measure the resistance between the C-14
headlamp automatic levelling-ECU connector
terminal No. 2 and the body earth.
OK: Continuity exists (2
Ω or less)
Q: Is the check result normal?
YES :
Go to Step 4.
NO :
Go to Step 3.
STEP 3. Wiring harness check from C-14
headlamp automatic levelling-ECU connector
terminal No. 2 to body earth
Check the earth wires for open circuit.
Q: Is the check result normal?
Trouble symptom
Inspection
Procedure No.
Reference
page
Malfunction of the power supply circuit system of headlamp automatic
levelling-ECU
1
The both headlamp automatic levelling systems (right and left) do not
work normally.
2
One of the automatic levellings does not work.
3
ACA00892
Connector: C-14 <LHD>
AS
ACA00895AR
Connector: C-14 <RHD>
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