Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2013 Toyota Prius TwoFACTORY OEM SERVICE PROCEDURE

Integration Relay: Installation: Installation

INSTALL NO. 1 INTEGRATION RELAY
1. Connect the 3 connectors.
  
  Fig 1: Identifying No. 1 Integration Relay & Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Engage the 2 claws to install the No. 1 integration relay as shown in the illustration.
  
  Fig 2: Identifying No. 1 Integration Relay & Claws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL NO. 1 RELAY BLOCK COVER
1. Engage the 3 claws to install the No. 1 relay block cover.
  
  Fig 3: Identifying No. 1 Relay Block Cover & Claws
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
NOTE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.