Section 326 (Air Conditioning System): Relay: Inspection

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.

Remove relay :
1. Remove the relay from the engine room J/B.
  
  Fig 1: Locating A/C Related Relays (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Remove the relay from the engine room R/B No. 3.
  
  Fig 2: Locating A/C Related Relays (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Inspect heater main relay continuity .

Fig 3: Identifying Heater Main Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Heater Main Relay Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the relay.
Inspect cooling fan No. 2 relay continuity .

Fig 5: Identifying Cooling Fan No. 2 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Cooling Fan No. 2 Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the relay.
Inspect magnetic clutch, cooling fan No. 1, 3, heater 1, 2, water pump relay continuity .

Fig 7: Identifying Magnetic Clutch, Cooling Fan No. 1 & 3, Heater 1& 2, & Water Pump Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Magnetic Clutch, Cooling Fan No. 1 & 3, Heater 1& 2, & Water Pump Relay Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the relay.
Inspect heater 3 relay continuity .

Fig 9: Identifying Heater No. 3 Relay Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 10: Identifying Heater No. 3 Relay Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the relay.