Index of all Tutorials

Temperature Sensors

Checking the ECU’s Water Temperature Sensor:

There are two water temp sensors. One goes to the ECU and one goes to the temp gauge. The sensor with the F.I. type(Red) connector is the one you need to look at. (It’s the LEFT one of the 2- as you look over the radiator at the engine.)

Temperature Deg. F. ........... Resistance k Ohms

68 degrees......................... 2.10 - 2.90 k ohms
122 degrees....................... 0.68 - 1.00 k ohms
176 degrees....................... 0.30 - 0.33 k ohms

Use a Multimeter to measure across the sensor (with the connector removed). Check the connections too.... if the connector is all gooped up and corroded, this could cause higher readings to the ECU and give more fuel dump.

If you end up removing the sensor, don't forget to bleed the cooling system.

Also test the harness. Ignition on: terminal a to ground shoud read 5 volts.
Ignition off: terminal b to ground should have continuity.

Location of the two coolant temperature sensors:

Original article

Interchangeability: at some point after 1994, the sensors changed for the DOHC.

Modified by vancouverbc at 9:35 PM 11/20/2007

Modified by vancouverbc at 7:35 AM 8/10/2008

Modified by vancouverbc at 7:36 AM 8/10/2008

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