Genuine Toyota Solara Relay

Toyota Solara Relay Parts Questions & Answers

• Relay Assembly, Starter
  28300-10020
  Q: What is the purpose of relays in a Toyota Solara and Toyota Avalon electrical system?

  A: Several electrical accessories in the vehicle, such as the fuel injection system, Horns, starter, and fog lamps use relays to transmit the electrical signal to the component. Relays use a low-current circuit to open and close a high-current circuit. If the relay is defective, that component will not operate properly. Most relays are mounted in the engine compartment fuse/relay box, with some specialized relays located in the underhood box at the right fender. On some models, the ABS relays are located in a separate underhood relay box at the left side of the radiator. If a faulty relay is suspected, it can be removed and tested. Defective relays must be replaced as a unit. Identification of the circuit the relay controls is often marked on the top of the relay, but the decal or imprint inside the cover of the relay box should also indicate which circuits they control. To test a relay, connect an ohmmeter across the two terminals of the power circuit. Continuity should not be indicated. Now connect a fused jumper wire between one of the two control circuit terminals and the positive battery terminal. Connect another jumper wire between the other control circuit terminal and ground. When the connections are made, the relay should click and continuity should be indicated on the meter. If the relay fails the test, replace it.
• Flasher Assy, Turn Signal
  81980-AA021
  Q: How do relays work in the Lexus ES300,Toyota Solara and Toyota Avalon's electrical system, and how can I test and diagnose relay-related issues?

  A: Various electrical accessories within the vehicle, such as the fuel injection system, Horns, starter, air conditioning/heating system, and fog lights, utilize relays to transmit electrical signals to the respective components. Relays function by utilizing a low-current control circuit to open and close a high-current power circuit. A defective relay can result in improper component operation. These relays are typically situated in engine compartment fuse/relay boxes. In case of suspected relay malfunction, they can be removed and tested. Faulty relays need to be replaced as a complete unit. To test relays, usually marked for identification, it's important to recognize the control circuit terminals (connected to the relay coil) and the power circuit terminals (connected when the control circuit coil is energized). Fused jumper wires are used to connect the control circuit terminals to the positive battery terminal and the ground. A functional relay should click with these connections. Continuity checks are then performed between the power circuit terminals, following the relay markings. If any of the tests fail, the relay should be replaced.