Note On Intermittents
Manipulate wiring, coolant sensor connector, engine-to-dash connector and PCM connector while observing PCM data P.0.4 or meter. If a failure is induced, data or meter will change from its current reading.
When voltage increases and temperature parameter decreases, an open circuit is indicated. If voltage decreases and temperature parameter increases from its current value, a short to ground is indicated. If an intermittent cannot be found, substitute a known good sensor, and retest.