AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) AFS ECU Power Source Circuit

DESCRIPTION

This circuit detects the state of the ignition switch, and sends it to the AFS ECU (headlight swivel ECU assembly).

WIRING DIAGRAM

*1	from IG1 NO. 1 Relay
*2	ECU-IG NO. 1
*3	ECU-IG NO. 3
*4	AFS ECU (Headlight Swivel ECU Assembly)

CAUTION / NOTICE / HINT

PROCEDURE

1. READ VALUE USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Body Electrical / AFS / Data List.

   5. Read the display on the GTS.

      
      Body Electrical > AFS > 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 > AFS > Data List

      Tester Display
      +B

      OK
      Normal condition listed above is displayed.

      Result
      Proceed to OK NG

   
   

   OK

   PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

   NG

2. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - POWER SOURCE AND BODY GROUND)

   
   

   1. Disconnect the A93 AFS ECU (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 A93-14 (IGS) - Body ground Ignition switch ON 11 to 14 V Ignition switch off Below 1 V A93-15 (IG) - Body ground Ignition switch ON 11 to 14 V Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition A93-22 (E1) - Body ground Always Below 1 Ω

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR