Note On Intermittents

Manipulate wiring on circuit No. 410, coolant sensor, and PCM connector while observing PCM parameter ED04. If failure is induced, coolant temperature will jump from its normal value to the shorted reading of 148°C or greater. Disconnect and reconnect coolant sensor and PCM connectors, and ensure they properly latch. If wiring and connectors are okay, substitute a known good sensor and retest.

Fig 1: PCM Code EO14, Schematic, Shorted Coolant Sensor Circuit

Fig 2: Flow Chart, PCM Code EO14, Shorted Coolant Sensor Circuit