Hybrid Control System: Inspection

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