Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (ANTI-LOCK)COMPONENT TESTSDECELERATION SENSOR CHECK
2004 Toyota Celica GT, Standard
Deceleration Sensor Check
2004 Toyota Celica GT, StandardSECTION Deceleration Sensor Check
WARNING: This page is about a different car, the 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
When inspecting deceleration sensor, remove it with bracket. Do not remove sensor from bracket. Do not apply voltage of 6 volts or more to terminals VGS and GGND.
- Connect 3 1.5 volt batteries in series.
- Connect VGS terminal to batteries' positive terminal, and GGND terminal to batteries' negative terminal. Apply about 4.5 volts between VGS and GGND terminals. See Fig 1.
- Check output voltage of GL1 and GL2 terminals. See Fig 2.
- Do not tilt sensor too much or it may show wrong values. If dropped, sensor should be replaced with a new one. Sensor removed from vehicle should not be placed upside down.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.