LIGHTING (EXT)  AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM  Headlight Leveling ECU Power Source Circuit  


DESCRIPTION

This circuit detects the state of the ignition switch and sends it to the headlight leveling ECU assembly.

WIRING DIAGRAM

E223770E37
4.844,2.75 7.021,2.938 2.177,0.188 10 false Headlight Leveling ECU Assembly 4.844,2.583 5.823,2.875 0.979,0.292 10 false A60 0.615,1.063 1.979,1.25 1.365,0.188 10 false from IG1 NO. 1 Relay 5.479,1.083 5.677,1.281 0.198,0.198 10 false IG 5.479,2.167 5.677,2.365 0.198,0.198 10 false E1 5.281,2.063 5.385,2.208 0.104,0.146 10 false 9 5.271,0.969 5.396,1.146 0.125,0.177 10 false 1 3.396,1.25 4.406,1.573 1.01,0.323 10 false ECU-IG NO. 3

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

If the headlight leveling ECU assembly has been replaced, it is necessary to initialize the headlight leveling ECU assembly.

Click hereVehicle Exterior>LIGHTING (EXT)>AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM>INITIALIZATION



PROCEDURE

1.READ VALUE USING GTS
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Body Electrical / HL AutoLeveling / Data List.


e.

Read the Data List according to the display on the GTS.

Body Electrical > HL AutoLeveling > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
+B IG power supply voltage value 0.00 to 19.75 V 11.00 to 14.00 V -
Body Electrical > HL AutoLeveling > Data List
Tester Display
+B
50003 165 7
OK:

Normal condition listed above is displayed.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM>PROBLEM SYMPTOMS TABLE


NG

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE - HEADLIGHT LEVELING ECU ASSEMBLY)
2.CHECK HARNESS AND CONNECTOR (POWER SOURCE - HEADLIGHT LEVELING ECU ASSEMBLY)
a.

Disconnect the A60 headlight leveling ECU assembly connector.


b.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition
A60-1 (IG) - Body ground Ignition switch off Below 1 V
A60-1 (IG) - Body ground Ignition switch ON 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BODY GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - BODY GROUND)
a.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
A60-9 (E1) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY

Click hereVehicle Exterior>LIGHTING (EXT)>HEADLIGHT LEVELING ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR