Headlight Signal Circuit: Procedure

1. Measure the voltage of the wire harness side connector.
   Fig 1: Identifying K67 Connector Terminal

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   Standard voltage

   Tester Connection	Specified Condition
   K67-23 (HEAD) - Body ground	10 to 14 V

OK → See step   2 

NG → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Disconnect the K67 ECU connector.
   Fig 2: Identifying K67 ECU Connector And K22 Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the K22 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   K67-23 (HEAD) - K22-4 (HEAD)	Below 1 Ω
   K67-23 (HEAD) or K22-4 (HEAD) - Body ground	10 kΩ or higher
   K22-5 (E) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

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