On-Vehicle Inspection Of Converter & Inverter Assembly

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Inspect inverter :
1. Turn the IG switch OFF and disconnect the 4 connectors.
2. Apply battery positive voltage to connector B terminal 5 (IGCT) on the inverter side through a fuse, and battery negative voltage to connector B terminal 6 (GND).
3. Measure the voltage and resistance between each terminal shown in Fig 1 and Fig 2 and ground.
  
  Fig 1: Identifying Inverter Terminals Of Connectors A-D
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 2: Identifying Inverter Connector Terminal Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Inspect converter :
1. Function check
  Measure the voltage of an auxiliary battery terminal when the "READY" lamp is OFF and ON.
  
  Fig 3: Locating The Driving Ready Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  READY lamp is OFF: Approximately 12 V .
  
  READY lamp is ON: Approximately 14 V .
2. Output current check
  1. Disconnect the MG2 power cable from the inverter. See ( a.
  2. Install AC/DC 400 A probe to the wire harness of the IP connector of the converter.
  3. Connect the MG2 power cable to the inverter. See ( i.
  4. With the READY lamp ON, operate electric devices one by one and measure the output current.

Standard: 100 A or less .

NOTE:

If more than 100 A is shown momentarily, check for the following:

Ground short of electric device.
Overload caused by installation of excessive device.
PTC heater operation.