How do relays work in electrical system, and how can I test and diagnose relay-related issues on 1997 through 2001 Toyota Avalon?

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.

Genuine Toyota Avalon Relay

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63 Relays found

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Toyota Avalon Relay Assembly
Part Number: 90987-02006
$38.57 MSRP: $53.91
You Save: $15.34 (29%)
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Product Specifications
- Other Name: Relay, Headlamp
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02027
$22.96 MSRP: $32.09
You Save: $9.13 (29%)
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Product Specifications
- Other Name: Relay, Cooling Fan
- Replaced by: 90080-87026
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2022 Toyota Avalon | Limited, Touring, XLE, XLE Premium, XLE Touring Or Touring, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
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Toyota Avalon Air Conditioning Clutch Relay
Part Number: 90987-02028
$82.00 MSRP: $115.59
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Product Specifications
- Other Name: Relay, Magnet-Clutch; Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2012 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA
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Toyota Avalon Relay
Part Number: 90987-04002
$26.88 MSRP: $37.58
You Save: $10.70 (29%)
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Product Specifications
- Other Name: Relay Assy (For Heater Blower Motor)
- Position: Front
- Replaced by: 90987-04002-83
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Circuit Opening Relay Assembly
Part Number: 90080-87024
$67.84 MSRP: $95.63
You Save: $27.79 (30%)
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Product Specifications
- Other Name: Relay, Headlamp
- Comment: (FOR EFI)
- Replaces: 90987-02025, 90987-T2002, 90987-02016
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2022 Toyota Avalon | Limited, Touring, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS, XSE | 4 Cyl 2.5L, 6 Cyl 3.0L, 6 Cyl 3.5L | 1MZFE; MCX20L-AEPGKA, 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Circuit Opening Relay Assembly
Part Number: 90084-98032
$57.94 MSRP: $80.99
You Save: $23.05 (29%)
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Product Specifications
- Other Name: Relay, Cooling Fan, NO.2; Fan Relay, Fuel Pump Relay, Relay, Relay Box Relay
- Comment: (AUTO DRIVE)
- Replaces: 90084-98026, 90080-87014, 90987-04004
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2022 Toyota Avalon | Limited, Touring, XLE, XLE Premium, XLE Touring Or Touring, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFE; AVX40L-AEXGBA, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
- 1998-2011 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.0L, 6 Cyl 3.5L | 1MZFE, 1MZFE; MCX10L-AEPGKA, 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02009
$47.95 MSRP: $67.02
You Save: $19.07 (29%)
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Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaces: 90084-98009, 90987-02010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Starter Relay Assembly
Part Number: 28300-10020
$81.41 MSRP: $114.75
You Save: $33.34 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assy, Starter; Relay, Relay Box Relay, Starter Relay
- Replaces: 28341-11010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Turn Signal Flasher Assembly
Part Number: 81980-12070
$54.97 MSRP: $76.83
You Save: $21.86 (29%)
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Product Specifications
- Other Name: Flasher Assy, Turn Signal
- Replaced by: 81980-32010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1998 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay
Part Number: 90987-04004
$57.94 MSRP: $80.99
You Save: $23.05 (29%)
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Product Specifications
- Other Name: Relay, Cooling Fan, NO.2
- Replaced by: 90084-98032
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2018 Toyota Avalon | Limited, XLE, XLE Premium, XLE Touring Or Touring | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
- 1998-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay
Part Number: 90987-02025
$67.84 MSRP: $95.63
You Save: $27.79 (30%)
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Product Specifications
- Other Name: Relay, Headlamp
- Replaced by: 90080-87024
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2002-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Circuit Opening Relay Assembly
Part Number: 90084-98031
$93.56 MSRP: $131.89
You Save: $38.33 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaces: 90084-98025, 90080-87008, 90080-87019, 90987-02012
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1998-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, 1MZFE; MCX20L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK, MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Circuit Opening Relay Assembly
Part Number: 90987-02012
$93.56 MSRP: $131.89
You Save: $38.33 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Relay, Computer (For EFI)
- Replaced by: 90084-98031
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2000-2004 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX20L-AEPGKA, MCX20L-AEPGKK, MCX20L-AEPNKA, MCX20L-AEPNKK, MCX20L-AESGKA, MCX20L-AESNKA
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Toyota Avalon Relay Assembly, Starter
Part Number: 28300-0A010
$74.45 MSRP: $104.94
You Save: $30.49 (30%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Relay Assy, Starter
- Replaced by: 28300-0A011
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2016 Toyota Avalon | Limited, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
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Toyota Avalon Horn Relay Assembly
Part Number: 86530-20070
$17.60 MSRP: $24.60
You Save: $7.00 (29%)
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Product Specifications
- Other Name: Relay Assembly, Horn; Horn Relay, Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1995-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Integration Relay
Part Number: 82641-33150
$150.22 MSRP: $213.56
You Save: $63.34 (30%)
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Product Specifications
- Other Name: Relay, Integration NO.1; Power Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2013-2015 Toyota Avalon | Limited, XLE, XLE Premium, XLE Touring Or Touring | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE; AVX40L-AEXGBA, AVX40L-AEXPBA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA
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Toyota Avalon Turn Signal Flasher Assembly
Part Number: 81980-02030
$58.89 MSRP: $82.32
You Save: $23.43 (29%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Flasher Assy, Turn Signal; Flasher, Flasher Relay, Relay, Turn Signal Flasher
- Replaces: 81980-05060, 81980-50030, 81980-05040
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2012 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA
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Toyota Avalon Relay Assembly for Heater Blower Motor
Part Number: 85925-17010
$62.88 MSRP: $88.64
You Save: $25.76 (30%)
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Product Specifications
- Other Name: Relay, Radiator Fan; Fan Relay, Main Relay, Relay
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1997-1999 Toyota Avalon | XL, XLS | 6 Cyl 3.0L | 1MZFE; MCX10L-AEPGKA, MCX10L-AEPGKK, MCX10L-AEPNKA, MCX10L-AEPNKK, MCX10L-AESGKA, MCX10L-AESGKK, MCX10L-AESNKA, MCX10L-AESNKK
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Toyota Avalon Relay Assembly
Part Number: 90080-87025
$67.72 MSRP: $95.46
You Save: $27.74 (30%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Relay, Defogger
- Comment: (FOR HEATER BLOWER MOTOR)
- Replaces: 90987-04006, 90987-04010, 90080-87031
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2019-2022 Toyota Avalon | Limited, Touring, XLE, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2GRFKS, A25AFKS, A25AFXS; AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA
- 2005-2011 Toyota Avalon | Limited, XL, XLS | 6 Cyl 3.5L | 2GRFE; GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA
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Toyota Avalon Relay
Part Number: 90080-87026
$22.96 MSRP: $32.09
You Save: $9.13 (29%)
Product Specifications
- Other Name: Relay, Fog Lamp; ECM Relay, Fan Relay, Horn Relay, Relay
- Replaces: 90080-87010, 90987-02027, 90987-T2001, 85915-12020
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 2005-2022 Toyota Avalon | Limited, Touring, XL, XLE, XLE Premium, XLE Touring Or Touring, XLS, XSE | 4 Cyl 2.5L, 6 Cyl 3.5L | 2ARFXE, 2GRFE, 2GRFKS, A25AFKS, A25AFXS; AVX40L-AEXGBA, AVX40L-AEXPBA, AXXA55L-AEZGBA, AXXA55L-AEZPBA, AXXH50L-AEXGBA, AXXH50L-AEXPBA, AXXH50L-AEXQBA, AXXH51L-AEXGBA, AXXH51L-AEXPBA, AXXH51L-AEXQBA, GSX30L-AEAGKA, GSX30L-AEANKA, GSX30L-AEAPKA, GSX30L-AETGKA, GSX30L-AETNKA, GSX30L-AETPKA, GSX40L-AETGKA, GSX40L-AETPKA, GSX40L-AETQKA, GSX50L-AEZGBA, GSX50L-AEZPBA, GSX50L-AEZQBA, GSX50L-AEZSBA

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Toyota Avalon Relay

The operation of the climate system is preserved thanks to the smart electric switch, which is actually a powerful Relay. Consequently, small control signals can command larger loads like the fan or blower motor. Thus, cabin comfort is maintained. Housed in a compact housing, the Relay depends on an electromagnet to shift contacts so that it can open or close a circuit as soon as a sensor or control module sends a prompt. This prevents expensive parts from straining when there is a change in conditions. Earlier versions of a Relay applied classic electromechanical hardware while newer styles added solid state designs for quieter operation and longer life, but all have the same purpose, which is to switch power on and off at precise intervals. Another variety is the latching Relay, which only requires a brief pulse to stay engaged. These are useful when power dips but the setting must remain unchanged. When any of the Relay sticks or burns out, the fan may stop or the heater might blast on a summer day. Then, swap the small unit to restore things back to normal without having to replace any big components. Throughout the generations of Toyota Avalon models, Toyota Avalon Relay network is an essential, inexpensive guardian of reliable air conditioning in every Toyota sedan named Avalon.

If you are in demand for superior quality and affordable OEM Toyota Avalon Relay, then shop with us! We own a wide range of the reduced-priced genuine Toyota Avalon Relay. You can purchase in confidence as all parts come with a manufacturer's warranty. Any issues with our products? No need to worry as we have a hassle-free return policy to guide you every step of the way.

Toyota Avalon Relay Parts Questions & Experts Answers

Starter Relay Assembly
28300-10020
Q: How do relays work in electrical system, and how can I test and diagnose relay-related issues on 1997 through 2001 Toyota Avalon?
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.