Inspection Procedure

1. Disconnect the H34 connector from the HV control ECU.
2. Remove the IGCT relay from the R/B No. 2.
3. Measure the voltage according to the value(s) in the table below when the ignition switch is in the ON position.
   NOTE: Turning the ignition switch to the ON position with the HV control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing the inspection.

   Standard voltage 

   HV CONTROL ECU - IGCT RELAY
   
   

   Tester Connection	Specified Condition
   MREL (H34-12) - Body ground	Below 1 V

   Fig 1: Checking Harness And Connector (HV Control ECU - IGCT Relay)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Remove the IGCT relay from the engine room R/B No. 2.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   IGCT RELAY
   
   

   Tester Connection	Specified Condition
   3 - 5	10 kΩ or more
   3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

   Fig 2: Inspecting IGCT Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE IGCT RELAY 

OK: REPLACE HYBRID VEHICLE CONTROL ECU