Inspection Procedure

Fig 1: Measuring Voltage Between Terminals Of HV Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the H15 and H16 HV control ECU connectors.
2. Disconnect the I11 A/C inverter connector.
3. Turn the power switch ON (IG).
4. Measure the voltage between the terminals of the HV control ECU connector and body ground.
   1. Standard: 
   VOLTAGE CHECK
   
   

   Tester Connection	Specified Condition
   CLK (H16-17)- Body ground	Below 1 V
   ITE (H16-14) - Body ground	Below 1 V
   ETI (H15-24) - Body ground	Below 1 V
   STB (H15-25) - Body ground	Below 1 V

5. Turn the power switch OFF.
6. Check the resistance between the wire harness side connectors.
   1. Standard (Check for open): 
   RESISTANCE CHECK
   
   

   Tester Connection	Specified Condition
   CLK (H16-17) -CLK (I11-4)	Below 1Ω
   ITE (H16-14) - TOECU (I11-2)	Below 1Ω
   ETI (H15-24) - TOINV (I11-3)	Below 1Ω
   STB (H15-25) -STB (I11-5)	Below 1Ω

   Fig 2: Identifying A/C Inverter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Standard (Check for short): 
   RESISTANCE CHECK
   
   

   Tester Connection	Specified Condition
   CLK (H16-17) or CLK (I11-4) - Body ground	10 kΩ or higher
   ITE (H16-14) or TOECU (I11-2) - Body ground	10 kΩ or higher
   ETI (H15-24) or TOINV (I11-3) - Body ground	10 kΩ or higher
   STB (H15-25) or STB (I11-5) - Body ground	10 kΩ or higher

7. Reconnect the A/C inverter connector.
8. Reconnect the HV control ECU connectors.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE W/CONVERTER INVERTER ASSY (See  W/CONVERTER INVERTER ASSY  in HYBRID CONTROL SYSTEM )