ECU Power Source Circuit [10/2016 - 09/2020]: 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 / AFS / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > AFS > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   +B	Headlight swivel ECU assembly IG power supply voltage value	0.00 to 19.75 V	11.00 to 14.00 V	-

   Body Electrical > AFS > 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 [10/2016 - 09/2020] 

Result: 

NG 

See step  2

1. Disconnect the A104 headlight swivel ECU assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A104-14 (IGS) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (IG)	11 to 14 V
   A104-15 (IG) - Body ground	Engine switch off	Below 1 V
   	Engine switch on (IG)	11 to 14 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
   A104-22 (E1) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY. Refer to  REMOVAL [10/2016 - 09/2020] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR