Circuit Description

By using the G-sensor, the PCM can determine if changes in crankshaft speed are due to engine misfire or are educed by driveline condition. If the G-sensor detects a rough road condition, the PCM misfire detection diagnostic will be deactivated. At rest, G-sensor output is 2.5 volts. During operation, G-sensor output can vary between .5-4.5 volts.

Conditions required to set DTC are:

• Engine is running.
• Vehicle is not moving.
• G-sensor signal indicates greater than 2.5 volts or less than 1.5 volts for one minute.