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

1. Disconnect the H20 parking assist ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H20-4 (GND1) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the H20 parking assist ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   H20-1 (+B) - H20-4 (GND1)	Always*1	11 to 14 V
   	Ignition switch off*2
   H20-2 (ACC) - H20-4 (GND1)	Ignition switch ACC	11 to 14 V
   	Ignition switch off	Below 1 V
   H20-3 (IG) - H20-4 (GND1)	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V

   1. *1: for Gasoline Model
   2. *2: for HV Model

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR