Inspection Procedure

1. Disconnect the H16 HV control ECU connector.
   Fig 1: Disconnecting H16 HV Control ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the C3 No. 1 circuit breaker sensor connector.
3. Turn the power switch ON (IG).
4. Measure the voltage between the terminals of the HV control ECU connector and body ground.

   Standard voltage 

   TERMINALS VOLTAGE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   AS1 (H16-15) - Body ground	Below 1 V
   AS1G (H16-16) - Body ground	Below 1 V

   Fig 2: Identifying Circuit Breaker Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Turn the power switch OFF.
6. Measure the resistance between the wire harness side connectors.

   Standard resistance (Check for open) 

   TERMINALS RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   AS1 (H16-15) - SIF+ (C3-2)	Below 1 Ω
   AS1G (H16-16) - SIF- (C3-1)	Below 1 Ω

   Standard resistance (Check for short) 

   TERMINALS RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   AS1 (H16-15) or SIF+ (C3-2) - Body ground	10 kΩ or higher
   AS1G (H16-16) or SIF- (C3-1) - Body ground	10 kΩ or higher

7. Reconnect the No. 1 circuit breaker sensor connector.
8. Reconnect the HV control ECU connector.

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : REPLACE NO. 1 CIRCUIT BREAKER SENSOR