How to Diagnose and Resolve Issues with a Faulty Coolant Temperature Gauge and Coolant Temperature Sensor on Toyota Tercel?

To troubleshoot issues with the coolant temperature gauge, start by checking the fuses if the gauge is inoperative. If the temperature indicator shows excessive temperature after running for a while, it may indicate a problem. In the case where the gauge indicates "Hot" shortly after starting the engine cold, disconnect the wire at the Coolant Temperature Sensor. If the gauge reading drops, replace the sending unit. If the reading remains high, there may be a shorted wire to the gauge or a faulty gauge. If the coolant temperature gauge fails to indicate after the engine has warmed up and the fuses are fine, shut off the engine. If the gauge still doesn't work, there may be an open circuit or a faulty gauge. For replacement, start by releasing any pressure in the radiator by removing and reinstalling the cap when the engine is cool. Disconnect the electrical connector from the sending unit and apply sealant to the threads of the new sending unit. Unscrew the old sending unit and quickly install the new one to prevent coolant loss. Tighten the sending unit securely and connect the wiring harness. Refill the cooling system, run the engine, and check for leaks and proper gauge operation.

Genuine Toyota Tercel Coolant Temperature Sensor

Coolant Water Temperature Sensor

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16 Coolant Temperature Sensors found

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Toyota Tercel Sensor, Water Temperature
Part Number: 89422-20010
$67.48 MSRP: $95.12
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Product Specifications
- Other Name: Sensor, Water Temperature (For E.F.I.)
- Manufacturer Note: ENGINE BLOCK
- Comment: (FOR E.F.I.)
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1989-1998 Toyota Tercel | BASE, DLX, DX, LE, STD | 4 Cyl 1.5L | 3E, 3EE, 5EFE; EL31L-NGKBSA, EL31L-ZDHDEA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHREA, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHREA, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHHRSK, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA, EL31L-ZHMRSK, EL42L-ADHDEK, EL42L-ADHREA, EL42L-ADHREK, EL42L-ADKBEA, EL42L-ADKBEK, EL42L-ADMDEK, EL42L-ADMREA, EL42L-ADMREK, EL42L-AEHDEA, EL42L-AEHDEK, EL42L-AEHREA, EL42L-AEHREK, EL42L-AEMDEA, EL42L-AEMDEK, EL42L-AEMREA, EL42L-AEMREK, EL53L-ADHBKA, EL53L-ADHBKK, EL53L-ADHRKA, EL53L-ADHRKK, EL53L-ADKBKA, EL53L-ADKBKK, EL53L-ADMRKA, EL53L-ADMRKK, EL53L-ADPRKA, EL53L-ADPRKK, EL53L-AEMRKA, EL53L-AEMRKK, EL53L-AEPRKA, EL53L-AEPRKK
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Toyota Tercel Sensor, Water Temperature
Part Number: 89422-16010
$67.48 MSRP: $95.12
You Save: $27.64 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Water Temperature (For E.F.I.)
- Comment: (FOR E.F.I.)
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1997-1999 Toyota Tercel | DX, STD | 4 Cyl 1.5L | 5EFE; EL53L-ADHBKA, EL53L-ADHBKK, EL53L-ADHRKA, EL53L-ADHRKK, EL53L-ADKBKA, EL53L-ADKBKK, EL53L-ADMRKA, EL53L-ADMRKK, EL53L-ADPRKA, EL53L-ADPRKK, EL53L-AEMRKA, EL53L-AEMRKK, EL53L-AEPRKA, EL53L-AEPRKK
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Toyota Tercel Sensor, Water Temperature
Part Number: 89422-22030
$68.55 MSRP: $96.62
You Save: $28.07 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Water Temperature (For E.F.I.)
- Comment: (FOR E.F.I.)
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1997-1999 Toyota Tercel | DX, STD | 4 Cyl 1.5L | 5EFE; EL53L-ADHBKA, EL53L-ADHBKK, EL53L-ADHRKA, EL53L-ADHRKK, EL53L-ADKBKA, EL53L-ADKBKK, EL53L-ADMRKA, EL53L-ADMRKK, EL53L-ADPRKA, EL53L-ADPRKK, EL53L-AEMRKA, EL53L-AEMRKK, EL53L-AEPRKA, EL53L-AEPRKK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-10100
$20.20 MSRP: $131.16
You Save: $110.96 (85%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Switch, Temperature Detect, NO.2; Fan Switch, Temperature Sending Unit
- Manufacturer Note: AISIN
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1987-1990 Toyota Tercel | B, BASE, DX, STD | 4 Cyl 1.5L | 3E, 3EE; EL31L-NGKBSA, EL31L-ZDHDEA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHREA, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHREA, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGKRSA, EL31L-ZGKRSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHHRSK, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA, EL31L-ZHMRSK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-12160
$122.49 MSRP: $174.13
You Save: $51.64 (30%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Switch, Temperature Detect, NO.2; Fan Switch, Temperature Switch
- Manufacturer Note: NIPPONDENSO
- Replaces: 89428-12150
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1992-1999 Toyota Tercel | DLX, DX, LE, STD | 4 Cyl 1.5L | 3EE, 5EFE; EL42L-ADHDEK, EL42L-ADHREA, EL42L-ADHREK, EL42L-ADKBEA, EL42L-ADKBEK, EL42L-ADMDEK, EL42L-ADMREA, EL42L-ADMREK, EL42L-AEHDEA, EL42L-AEHDEK, EL42L-AEHREA, EL42L-AEHREK, EL42L-AEMDEA, EL42L-AEMDEK, EL42L-AEMREA, EL42L-AEMREK, EL53L-ADHBKA, EL53L-ADHBKK, EL53L-ADHRKA, EL53L-ADHRKK, EL53L-ADKBKA, EL53L-ADKBKK, EL53L-ADMRKA, EL53L-ADMRKK, EL53L-ADPRKA, EL53L-ADPRKK, EL53L-AEMRKA, EL53L-AEMRKK, EL53L-AEPRKA, EL53L-AEPRKK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-15011
$138.40 MSRP: $196.76
You Save: $58.36 (30%)
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Product Specifications
- Other Name: Switch, Temperature Detect, NO.2
- Replaced by: 89428-32010
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1980-1982 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 1AC, 3A, 3AC; AL10L-ZDHDCA, AL10L-ZDHRCA, AL10L-ZDKRCA, AL10L-ZDKRCK, AL10L-ZDMDCA, AL10L-ZDMRCA, AL10L-ZGHDCA, AL10L-ZGHRCA, AL10L-ZGMDCA, AL10L-ZGMQCA, AL10L-ZGMRCA, AL12L-ZDHRCA, AL12L-ZDHRSK, AL12L-ZDKRCA, AL12L-ZDKRCK, AL12L-ZDKRSK, AL12L-ZDMDCA, AL12L-ZDMRCA, AL12L-ZDMRSK, AL12L-ZEHRCA, AL12L-ZEHRSK, AL12L-ZEKRSK, AL12L-ZEMRCA, AL12L-ZGHDCA, AL12L-ZGHDSK, AL12L-ZGHRSK, AL12L-ZGKRSK, AL12L-ZGMDCA, AL12L-ZGMDSK, AL12L-ZGMQCA, AL12L-ZGMQSK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89427-12090
$122.49 MSRP: $174.13
You Save: $51.64 (30%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Temperature Sending Unit
- Replaces: 89427-12100
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1987-1990 Toyota Tercel | B, BASE, DX, STD | 4 Cyl 1.5L | 3E, 3EE; EL31L-NGKBSA, EL31L-ZDHDEA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHREA, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHREA, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGKRSA, EL31L-ZGKRSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHHRSK, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA, EL31L-ZHMRSK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-15030
$126.69 MSRP: $180.11
You Save: $53.42 (30%)
Product Specifications
- Other Name: Switch, Temperature Detect, NO.2
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1983-1988 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 3A, 3AC; AL21LG-ZWHDCA, AL21LG-ZWHDCK, AL21LG-ZWMDCA, AL21LG-ZWMDCK, AL21L-ZGHDCA, AL21L-ZGHRCA, AL21L-ZGHRSK, AL21L-ZGKRCA, AL21L-ZGKRCK, AL21L-ZGKRSK, AL21L-ZGMDCA, AL21L-ZGMQCA, AL21L-ZGMQSK, AL21L-ZHHDCA, AL21L-ZHHDSK, AL21L-ZHHRCA, AL21L-ZHHRSK, AL21L-ZHKRSK, AL21L-ZHMDCA, AL21L-ZHMDSK, AL21L-ZHMRCA, AL25LG-ZWFDCA, AL25LG-ZWFDCK, AL25LG-ZWFQCA, AL25LG-ZWFQCK, AL25LG-ZWHDCA, AL25LG-ZWHDCK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-20060
Product Specifications
- Other Name: Switch, Temperature Detect, NO.2
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1989-1993 Toyota Tercel | BASE, DLX, DX, LE, STD | 4 Cyl 1.5L | 3E, 3EE; EL31L-NGKBSA, EL31L-ZDHDEA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHREA, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHREA, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHHRSK, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA, EL31L-ZHMRSK, EL42L-ADHDEK, EL42L-ADHREA, EL42L-ADHREK, EL42L-ADKBEA, EL42L-ADKBEK, EL42L-ADMDEK, EL42L-ADMREA, EL42L-ADMREK, EL42L-AEHDEA, EL42L-AEHDEK, EL42L-AEHREA, EL42L-AEHREK, EL42L-AEMDEA, EL42L-AEMDEK, EL42L-AEMREA, EL42L-AEMREK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89427-12060
Product Specifications
- Other Name: Temperature Sending Unit
- Manufacturer Note: WATER TEMPERATURE SWITCH
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1984-1988 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 3A, 3AC; AL21LG-ZWHDCA, AL21LG-ZWHDCK, AL21LG-ZWMDCA, AL21LG-ZWMDCK, AL21L-ZGHDCA, AL21L-ZGHRCA, AL21L-ZGHRSK, AL21L-ZGKRCA, AL21L-ZGKRCK, AL21L-ZGKRSK, AL21L-ZGMDCA, AL21L-ZGMQCA, AL21L-ZGMQSK, AL21L-ZHHDCA, AL21L-ZHHDSK, AL21L-ZHHRCA, AL21L-ZHHRSK, AL21L-ZHKRSK, AL21L-ZHMDCA, AL21L-ZHMDSK, AL21L-ZHMRCA, AL25LG-ZWFDCA, AL25LG-ZWFDCK, AL25LG-ZWFQCA, AL25LG-ZWFQCK, AL25LG-ZWHDCA, AL25LG-ZWHDCK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89427-16010
Product Specifications
- Manufacturer Note: CALIFORNIA SPEC
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1980-1982 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 1AC, 3A, 3AC; AL10L-ZDHDCA, AL10L-ZDHRCA, AL10L-ZDKRCA, AL10L-ZDKRCK, AL10L-ZDMDCA, AL10L-ZDMRCA, AL10L-ZGHDCA, AL10L-ZGHRCA, AL10L-ZGMDCA, AL10L-ZGMQCA, AL10L-ZGMRCA, AL12L-ZDHRCA, AL12L-ZDHRSK, AL12L-ZDKRCA, AL12L-ZDKRCK, AL12L-ZDKRSK, AL12L-ZDMDCA, AL12L-ZDMRCA, AL12L-ZDMRSK, AL12L-ZEHRCA, AL12L-ZEHRSK, AL12L-ZEKRSK, AL12L-ZEMRCA, AL12L-ZGHDCA, AL12L-ZGHDSK, AL12L-ZGHRSK, AL12L-ZGKRSK, AL12L-ZGMDCA, AL12L-ZGMDSK, AL12L-ZGMQCA, AL12L-ZGMQSK
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Toyota Tercel Switch, Temperature
Part Number: 89427-16020
Product Specifications
- Other Name: Switch, Temperature Detect; Temperature Sending Unit
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1983-1988 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 3A, 3AC; AL21LG-ZWHDCA, AL21LG-ZWHDCK, AL21LG-ZWMDCA, AL21LG-ZWMDCK, AL21L-ZGHDCA, AL21L-ZGHRCA, AL21L-ZGHRSK, AL21L-ZGKRCA, AL21L-ZGKRCK, AL21L-ZGKRSK, AL21L-ZGMDCA, AL21L-ZGMQCA, AL21L-ZGMQSK, AL21L-ZHHDCA, AL21L-ZHHDSK, AL21L-ZHHRCA, AL21L-ZHHRSK, AL21L-ZHKRSK, AL21L-ZHMDCA, AL21L-ZHMDSK, AL21L-ZHMRCA, AL25LG-ZWFDCA, AL25LG-ZWFDCK, AL25LG-ZWFQCA, AL25LG-ZWFQCK, AL25LG-ZWHDCA, AL25LG-ZWHDCK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-15010
Product Specifications
- Other Name: Switch, Temperature Detect, NO.2
- Manufacturer Note: 1POLE
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1980-1981 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 1AC, 3A, 3AC; AL10L-ZDHDCA, AL10L-ZDHRCA, AL10L-ZDKRCA, AL10L-ZDKRCK, AL10L-ZDMDCA, AL10L-ZDMRCA, AL10L-ZGHDCA, AL10L-ZGHRCA, AL10L-ZGMDCA, AL10L-ZGMQCA, AL10L-ZGMRCA, AL12L-ZDHRCA, AL12L-ZDHRSK, AL12L-ZDKRCA, AL12L-ZDKRCK, AL12L-ZDKRSK, AL12L-ZDMDCA, AL12L-ZDMRCA, AL12L-ZDMRSK, AL12L-ZEHRCA, AL12L-ZEHRSK, AL12L-ZEKRSK, AL12L-ZEMRCA, AL12L-ZGHDCA, AL12L-ZGHDSK, AL12L-ZGHRSK, AL12L-ZGKRSK, AL12L-ZGMDCA, AL12L-ZGMDSK, AL12L-ZGMQCA, AL12L-ZGMQSK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-16010
Product Specifications
- Manufacturer Note: OIL TEMPERATURE SWITCH
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1984-1988 Toyota Tercel | DLX, SR5, STD | 4 Cyl 1.5L | 3A, 3AC; AL21LG-ZWHDCA, AL21LG-ZWHDCK, AL21LG-ZWMDCA, AL21LG-ZWMDCK, AL21L-ZGHDCA, AL21L-ZGHRCA, AL21L-ZGHRSK, AL21L-ZGKRCA, AL21L-ZGKRCK, AL21L-ZGKRSK, AL21L-ZGMDCA, AL21L-ZGMQCA, AL21L-ZGMQSK, AL21L-ZHHDCA, AL21L-ZHHDSK, AL21L-ZHHRCA, AL21L-ZHHRSK, AL21L-ZHKRSK, AL21L-ZHMDCA, AL21L-ZHMDSK, AL21L-ZHMRCA, AL25LG-ZWFDCA, AL25LG-ZWFDCK, AL25LG-ZWFQCA, AL25LG-ZWFQCK, AL25LG-ZWHDCA, AL25LG-ZWHDCK
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Toyota Tercel Switch, Temperature Detect
Part Number: 89428-10110
Product Specifications
- Other Name: Switch, Temperature Detect, NO.2; Fan Switch
- Manufacturer Note: NIPPONDENSO
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1989-1990 Toyota Tercel | BASE, DX, STD | 4 Cyl 1.5L | 3E, 3EE; EL31L-NGKBSA, EL31L-ZDHDEA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHREA, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHREA, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHHRSK, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA, EL31L-ZHMRSK
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Toyota Tercel Switch, Temperature
Part Number: 89427-12070
Product Specifications
- Other Name: Switch, Temperature Detect; Temperature Sending Unit, Temperature Sensor
- Replaces: 87427-12070
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
Fits the following Vehicles:
- 1987-1988 Toyota Tercel | B, DX, STD | 4 Cyl 1.5L | 3E; EL31L-NGKBSA, EL31L-ZDHDSA, EL31L-ZDHDSK, EL31L-ZDHRSA, EL31L-ZDMDSA, EL31L-ZDMDSK, EL31L-ZDMRSA, EL31L-ZGHBSA, EL31L-ZGHDSA, EL31L-ZGHDSK, EL31L-ZGHRSA, EL31L-ZGHRSK, EL31L-ZGKBSA, EL31L-ZGKBSK, EL31L-ZGKRSA, EL31L-ZGKRSK, EL31L-ZGMDSA, EL31L-ZGMDSK, EL31L-ZGMRSA, EL31L-ZGMRSK, EL31L-ZHHDSA, EL31L-ZHHDSK, EL31L-ZHHRSA, EL31L-ZHMDSA, EL31L-ZHMDSK, EL31L-ZHMRSA

Toyota Tercel Coolant Temperature Sensor

If you are in demand for superior quality and affordable OEM Toyota Tercel Coolant Temperature Sensor, then shop with us! We own a wide range of the reduced-priced genuine Toyota Tercel Coolant Temperature Sensor. 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 Tercel Coolant Temperature Sensor Parts Questions & Experts Answers

Sensor, Water Temperature
89422-20010
Q: How to Diagnose and Resolve Issues with a Faulty Coolant Temperature Gauge and Coolant Temperature Sensor on Toyota Tercel?
A:
To troubleshoot issues with the coolant temperature gauge, start by checking the fuses if the gauge is inoperative. If the temperature indicator shows excessive temperature after running for a while, it may indicate a problem. In the case where the gauge indicates "Hot" shortly after starting the engine cold, disconnect the wire at the Coolant Temperature Sensor. If the gauge reading drops, replace the sending unit. If the reading remains high, there may be a shorted wire to the gauge or a faulty gauge. If the coolant temperature gauge fails to indicate after the engine has warmed up and the fuses are fine, shut off the engine. If the gauge still doesn't work, there may be an open circuit or a faulty gauge. For replacement, start by releasing any pressure in the radiator by removing and reinstalling the cap when the engine is cool. Disconnect the electrical connector from the sending unit and apply sealant to the threads of the new sending unit. Unscrew the old sending unit and quickly install the new one to prevent coolant loss. Tighten the sending unit securely and connect the wiring harness. Refill the cooling system, run the engine, and check for leaks and proper gauge operation.