Inspection Procedure

1. Inspect IG1 relay continuity.
   Fig 1: Identifying Relay Test terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the IG1 relay from the instrument panel J/B.
   2. Measure the resistance according to the value(s) in the table below.
      STANDARD RESISTANCE CONDITION CHART
      
      

      Tester Connection	Specified Condition
      3 - 5	10 k or higher
      3 - 5	Below 1 (When battery voltage is applied to terminal 1 - 2)

NG: REPLACE IG1 RELAY 

OK: Go to Next Step 

Fig 2: Identifying Terminals Of Headlight Beam Level Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A21-14 - A21-1	Ignition switch off --> Ignition switch on (IG)	Below 1 V --> 10 to 14 V

NG: Go to step 3 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

1. Disconnect connector A21 of the headlight beam level control ECU.
   Fig 3: Disconnecting Connector A21 Of The Headlight Beam Level Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.
   STANDARD VOLTAGE CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A21-14 - Body ground	Ignition switch off --> Ignition switch on (IG)	Below 1 V --> 10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

Fig 4: Identifying Terminals Of Headlight Beam Level Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   A21-1 (E1) - Body ground	Always	Below 1

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE