Headlight Leveling ECU Power Source Circuit [04/2013 - 10/2016]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL AutoLeveling / Data List.
5. Read the display on the Techstream.

   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

   OK

   Normal condition listed above is displayed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [04/2013 - 10/2016] 

Result: 

NG 

See step  2

1. Disconnect the A65 headlight leveling ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Headlight Leveling ECU Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A65-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   A65-1 (IG) - Body ground	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A65-9 (E1) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY. Refer to  REMOVAL [04/2013 - 10/2016] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR