Section 150 (Hybrid Control System): Inspection

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT INTEGRATION RELAY (IGCT RELAY)

Check the HEV fuse.
1. Remove the 20 A fuse. Using an ohmmeter, measure the resistance between the terminals.
1. Standard: Below 1 Ω
If the standard is not met, replace the fuse.

Fig 1: Identifying Integration Relay Connection Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the IGCT relay.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
7J-1 - 7J-4	10 kΩ or higher
7J-1 - 7K-1	Below 1 Ω
7J-2 - 7J-3	Below 1 Ω
7J-4 - 7K-1	10 kΩ or higher

If the standards are not met, replace the integration relay.

Using an ohmmeter, measure the resistance between the terminals when battery voltage is applied to terminals 7J-2 and 7J-3.

Standard:

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
7J-1 - 7J-4	Below 1 Ω
7J-1 - 7K-1	Below 1 Ω

If the standards are not met, replace the integration relay.

INSPECT WATER W/MOTOR & BRACKET PUMP ASSY
1. Check the operation.
  1. Connect the battery positive terminal to terminal 1 and the battery negative terminal to terminal 2, then check that the pump motor operates properly.
  NOTE:
  - Do not connect the positive and negative poles of the battery to the wrong terminals.
  - Complete the check within 10 seconds of connection.
  If it does not operate properly, replace the water pump with motor and bracket.
  
  Fig 2: Identifying Water/Motor & Bracket Pump Assy Connector Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002