Inspection Procedure

1. Remove the AM2 fuse from the main body ECU RH.
2. Measure the resistance of the fuse.

   Standard resistance: Below 1 Ω 

NG: REPLACE FUSE 

OK: GO TO Next Step 

1. Disconnect the K73 ECU connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   K73-33 (AM1) - Body ground	10 to 14 V
   K73-12 (AM2) - Body ground	10 to 14 V

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   K73-6 (GND2) - Body ground	Below 1 Ω

Fig 1: Identifying K73 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE POWER SOURCE CONTROL ECU