Notes On Intermittents

Manipulate affected wiring and connectors while observing ECM parameter ED02. Apply and release vacuum to MAP sensor vacuum port using a vacuum source. If ECM parameter code ED02 displays greater than 105 kPa, condition has been induced and cause of intermittent should be repaired. If wiring and connectors are okay, substitute a known good sensor and retest.

Review snapshot data parameters stored with this code to verify failure. If failure is verified, check and repair intermittent wiring connection or sensor.

Fig 1: Schematic, Code EO31, Shorted MAP Sensor Circuit

Fig 2: Flow Chart, Code EO31, Shorted MAP Sensor Circuit

NOTE: If a hard code EO31 is accompanied by a hoard code EO38, See DFI Chart A, "Multiple ECM Codes Stored Hard".

Fig 3: Flow Chart, Code EO31, Shorted MAP Sensor Circuit