1992 Lexus ES 300 AutomaticFACTORY OEM SERVICE PROCEDURE

Coolant Temperature Sensor

Using a DVOM, measure resistance between coolant temperature sensor terminals. For coolant temperature sensor location, see Fig 1. See COOLANT TEMPERATURE SENSOR RESISTANCEΒ  table. If coolant temperature sensor is not within specification, replace sensor.

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature Ohms
176Β°F (80Β°C) 1480-1580
Fig 1: Locating System Components
G92B26121Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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