Note On Intermittents

Manipulate circuits No. 410 and 476, coolant sensor and PCM connector while observing PCM parameter P.0.4. If failure is induced, coolant temperature will jump from its normal value to open circuit reading. Disconnect and reconnect coolant sensor and PCM connectors; ensure connectors are latched before replacing components.

Fig 1: PCM Code E15, Schematic, Open Coolant Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code E15, Flow Chart, Open Coolant Sensor Ckt

Courtesy of GENERAL MOTORS CORP.

Fig 3: PCM Code E15