Inspect Engine Coolant Temperature Sender Gauge Resistance

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

Connect the wire harness as shown in the illustration, and adjust the ammeter pointer to indicate "O" using the slide rheostat, then read the rheostat indication.

Fig 1: Testing Engine Coolant Temperature Sender Gauge

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Fig 2: Engine Coolant Temperature Sender Gauge Specifications

If resistance value is not as specified, replace the engine coolant sender gauge.