AUTOMATIC HIGH BEAM SYSTEM Automatic High Beam Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects auto high beam switch signals.

The automatic high beam system can be turned on and off by operating the auto high beam switch.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   READ VALUE USING GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

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

   5. Read the display on the GTS.

      Table 1. Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Auto High Beam Main Switch	Auto high beam switch signal/ON or OFF	ON: Auto high beam switch pressed OFF: Auto high beam switch not pressed	-

      OK
      Normal conditions listed above are displayed.

   
   
   • OK

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

   • NGClick here
2. Click here

   INSPECT AUTO HIGH BEAM SWITCH

   
   

   1. Remove the auto high beam switch (Click here).

   2. Inspect the auto high beam switch (Click here).

      OK
      Auto high beam switch is normal.

   
   
   • OKClick here
   • NG

     REPLACE AUTO HIGH BEAM SWITCH (Click here)

3. Click here

   CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

   
   

   1. Disconnect the H7 auto high beam switch connector.

   2. Disconnect the H10 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition H7-6 (+B) - H10-17 (AHBI) Always Below 1 Ω H7-6 (+B) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - BODY GROUND)

   
   

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

      Standard Resistance
      Tester Connection Condition Specified Condition H7-3 (E) - Body ground Always Below 1 Ω

   
   
   • OK

     REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR