Deputy of Mayberry
Join Date: Dec 2007
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There are actually three coolant temperature sensors.
1) The ECT which feeds the ECU. That one's in your picture; the one on the left with the green connector on it.
2) The fan sensor, or more accurately, switch. On the 4 cylinder, it's mounted in the radiator at the bottom on the passenger side.
3) The sensor the gauge uses. Not sure where it is on the 4 cyl, but I *think* it's in your pic, the one next to the green one.
2015 RAV4 Limited, AWD, tech pkg, Barcelona red metallic, 19k miles
1996 Avalon XLS, ABS brakes, super white II, acquired w/ 139k, now at 342k
1992 Camry LE, V6 (3VZ-FE), ABS brakes, dark emerald pearl, owned since new. Replaced HGs @332k, totaled at 384k miles