No.1 AUTO LEVELING WARNING LIGHT ILLUMINATES WHEN THE IGNITION SWITCH TURNED TO ON POSITION [HEADLIGHT AUTO LEVELING SYSTEM]
id0903d0930100
|
1
|
Auto leveling warning light illuminates when the ignition switch turned to ON position
|
|
POSSIBLE CAUSE
|
• Headlight auto leveling function related electrical part the malfunction
• Vehicle speed signal is above 180 km/h {112 mph} or more
• Auto leveling warning light control circuit the malfunction
|
Diagnostic Procedure
|
STEP |
INSPECTION |
ACTION |
|
|---|---|---|---|
|
1
|
VERIFY THAT THE FRONT AND REAR AUTO LEVELING SENSER INSTALLATION
• Verify that the front and rear auto leveling sensor installation.
• Is there any bend, damage or dislocated link at the bracket?
|
Yes
|
Repair or replace the malfunctioning part.
|
|
No
|
Go to the next step.
|
||
|
2
|
INSPECT AUTO LEVELING CONTROL MODULE POWER SUPPLY VOLTAGE
• Turn the ignition switch to ON position.
• Measure the voltage between auto leveling control module terminal H and GND.
• Is the voltage B+?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace for open circuit between the ignition switch and auto leveling control module terminal H.
|
||
|
3
|
INSPECT AUTO LEVELING CONTROL MODULE GND CIRCUIT FOR OPEN
• Turn the ignition switch to OFF.
• Disconnect the auto leveling control module connector.
• Verify that continuity between auto leveling control module terminal F and GND.
• Is there continuity?
|
Yes
|
Connector the auto leveling control module connector, then go to Step 5.
|
|
No
|
Go to the next step.
|
||
|
4
|
INSPECT GND POINT
• Verify that the GND point for auto leveling control module.
• Is there loose or poor connection at GND point?
|
Yes
|
Retighten the GND point.
|
|
No
|
Repair or replace for open circuit between auto leveling control module terminal F and GND.
|
||
|
5
|
INSPECT IF THE MALFUNCTION IS IN FRONT AUTO LEVELING SENSOR OR ELSEWHERE
• Turn the ignition switch to ON position.
• Turn the headlight to ON.
• Measure the voltage between auto leveling control module terminal G and GND.
• Is the voltage 0.25—4.75 V?
|
Yes
|
Go to the next step.
|
|
No
|
Go to Step 9.
|
||
|
6
|
INSPECT IF THE MALFUNCTION IS IN REAR AUTO LEVELING SENSOR OR ELSEWHERE
• Turn the ignition switch to ON position.
• Turn the headlight to ON.
• Measure the voltage between auto leveling control module terminal E and GND.
• Is the voltage 0.25—4.75 V?
|
Yes
|
Go to Step 11.
|
|
No
|
Go to the next step.
|
||
|
7
|
INSPECT THE REAR AUTO LEVELING SENSOR SIGNAL CIRCUIT
• Inspect the wiring harness between auto leveling control module terminal E and rear auto leveling sensor terminal D.
• Is there open or short circuit detected?
|
Yes
|
Repair or replace for open short circuit.
|
|
No
|
Go to the next step.
|
||
|
8
|
INSPECT REAR AUTO LEVELING SENSOR
• Inspect the rear auto leveling sensor.
• Is the rear auto leveling sensor normal?
|
Yes
|
Repair or replace for open circuit at following.
• Between auto leveling control module terminal M and rear auto leveling sensor terminal A.
• Between auto leveling control module terminal D and rear auto leveling sensor terminal B.
|
|
No
|
Replace the rear auto leveling sensor.
|
||
|
9
|
INSPECT IF THE MALFUNCTION IS IN AUTO LEVELING SENSOR POWER OR GND CIRCUIT OR ELSEWHERE
• Turn the ignition switch to ON position.
• Turn the headlight to ON.
• Measure the voltage between auto leveling control module terminal E and GND.
• Is the voltage 0.25—4.75 V?
|
Yes
|
Go to the next step.
|
|
No
|
Repair or replace for open circuit at following.
• Between auto leveling control module terminal M and front auto leveling sensor terminal A.
• Between auto leveling control module terminal M and rear auto leveling sensor terminal A.
• Between auto leveling control module terminal D and front auto leveling sensor terminal D.
• Between auto leveling control module terminal D and rear auto leveling sensor terminal B.
|
||
|
10
|
INSPECT FRONT AUTO LEVELING SENSOR SIGNAL CIRCUIT
• Inspect the wiring harness between auto leveling control module terminal G and front auto leveling control sensor terminal C.
• Is there open or short circuit detected?
|
Yes
|
Repair or replace for open or short circuit.
|
|
No
|
Inspect the front auto leveling sensor. Replace the malfunctioning part.
|
||
|
11
|
INSPECT IF THE MALFUNCTION IS IN AUTO LEVELING WARNING LIGHT CONTROL CIRCUIT OR ELSEWHERE
• Turn the ignition switch to OFF.
• Disconnect the auto leveling control module and instrument cluster connectors.
• Verify that continuity between auto leveling control module terminal V and GND.
• Is there continuity?
|
Yes
|
Repair or replace for short to GND circuit.
|
|
No
|
Go to the next step.
|
||
|
12
|
INSPECT IF THE MALFUNCTION IS IN INSTRUMENT CLUSTER
• Turn the ignition switch to OFF.
• Connect the instrument cluster connector (with auto leveling control module connector disconnected).
• Short to GND at auto leveling control module terminal V using the jumper wire.
• Turn the ignition switch to ON position.
• Dose the auto leveling warning light illuminate?
|
Yes
|
Go to the next step.
|
|
No
|
Replace the instrument cluster.
|
||
|
13
|
INSPECT IF THE MALFUNCTION IS IN VEHICLE SPEED SIGNAL CIRCUIT OR ELSEWHERE
• Turn the ignition switch to OFF.
• Disconnect the auto leveling control module connector.
• Turn the ignition switch to ON position.
• Measure the voltage between auto leveling control module terminal R and GND.
• Is the voltage B+?
|
Yes
|
Repair or replace for short to power supply.
|
|
No
|
Replace the auto leveling control module.
|
||