Inspection Procedure

1. Remove the AM2 fuse from the cowl side J/B 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 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   K73-6 (GND2) - Body ground	10 kΩ or higher

Fig 1: Identifying K73 ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPLACE POWER SOURCE CONTROL ECU