Lighting System Headlight (Hi-Beam) Circuit

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (HEADLIGHT)

INSPECT HEADLIGHT RELAY (H-LP HI)

CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY [H-LP HI] - BATTERY)

CHECK HARNESS AND CONNECTOR (HEADLIGHT RELAY [H-LP HI] - MAIN BODY ECU AND BODY GROUND)

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

1. Using the intelligent tester, perform the Active Test (LandCruiser RM000000PKV0J6X.html).
   
   

   Main Body

   Tester Display	Test Part	Control Range	Diagnostic Note
   Head Light Hi	Headlight dimmer relay	ON/OFF	-

   OK:

   Relay operates (high beam headlights illuminate).
   

1. Remove the headlight relay from the engine room relay block.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   3 - 5	Battery voltage not applied between terminals 1 and 2	10 kΩ or higher
   3 - 5	Battery voltage applied between terminals 1 and 2	Below 1 Ω

1. Remove the headlight relay from the engine room relay block.
   

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   Headlight dimmer relay terminal 1 - Body ground	Always	11 to 14 V
   Headlight dimmer relay terminal 5 - Body ground

   Text in Illustration

   *a	Front view of wire harness connector (to Headlight Dimmer Relay)

1. Remove the headlight relay from the engine room relay block.
   

2. Disconnect the G64 main body ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   Headlight dimmer relay terminal 2 - G64-15 (DIM)	Always	Below 1 Ω
   G64-15 (DIM) - Body ground	Always	10 kΩ or higher