ECU Power Source Circuit [09/2014 - ]: Procedure

1. Disconnect the O25, O33 or N41 ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   O25-1 (IG) - Body ground*1 O33-1 (IG) - Body ground*2 N41-1 (IG) - Body ground*3	Ignition switch ON	10 to 16 V
   	Ignition switch off	Below 1 V

   • *1: w/o Intuitive Parking Assist System with Smart Key System
   • *2: w/o Intuitive Parking Assist System without Smart Key System
   • *3: w/ Intuitive Parking Assist System
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O25-12 (GND) - Body ground*1 O33-12 (GND) - Body ground*2 N41-12 (GND) - Body ground*3	Always	Below 1 Ω

   • *1: w/o Intuitive Parking Assist System with Smart Key System
   • *2: w/o Intuitive Parking Assist System without Smart Key System
   • *3: w/ Intuitive Parking Assist System
   TEXT IN ILLUSTRATION
   
   

   *A	w/o Intuitive Parking Assist System with Smart Key System
   *B	w/o Intuitive Parking Assist System without Smart Key System
   *C	w/ Intuitive Parking Assist System
   *a	Front view of wire harness connector (to Tire Pressure Warning ECU and Receiver)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2