Power Source Circuit [12/2019 - 10/2022]: Procedure

1. Disconnect the H8 integration control sub-assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H8-20 (GND) - Body ground	Always	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Integration Control Sub-assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H8-1 (B) - H8-20 (GND)	Always*3 Ignition switch off*4	11 to 14 V*1 10.5 to 16 V*2
   H8-3 (ACC) - H8-20 (GND)	Ignition switch ACC	11 to 14 V*1 10.5 to 16 V*2
   G3-4 (IG+) - H8-20 (GND)	Ignition switch ON	11 to 14 V*1 10.5 to 16 V*2

   *1: w/o Stop and Start System

   *2: w/ Stop and Start System

   *3: for Gasoline Model

   *4: for HV Model

   Result

   Result	Proceed to
   OK	A
   NG (w/o Stop and Start System)	B
   NG (w/ Stop and Start System)	C

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022] 

Result: 

B 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

C 

GO TO STOP AND START SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 10/2022]