Turn Signal And Hazard Warning System: 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.

Inspect Turn Signal Switch Continuity

Fig 1: Identifying Turn Signal Switch Positions & Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Turn Signal Switch Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
Inspect Hazard Warning Switch Continuity

Fig 3: Identifying Hazard Warning Switch Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Hazard Warning Switch Terminal Specifications
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
Inspect Turn Signal Flasher Operation
1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 3.
  
  Fig 5: Testing Turn Signal Flasher & Identifying Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the 2 turn signal light bulbs parallel to each other to terminals 1 and 3. Check that the bulbs flash.
  NOTE:
  - The turn signal lights should flash 60 or 120 times per minute.
  - If one of the front or rear turn signal lights has an open circuit, the number of flashers will be more than 140 per minute.
  If operation is not as specified, replace the flasher.