Ground Circuits
- Using an ohmmeter, check for continuity to ground on PCM ground terminals. See wiring diagram in WIRING DIAGRAMS - 1.0L article to determine PCM ground terminals. Resistance to ground should be zero ohms. If reading is other than zero ohms, repair open to circuit ground.
- Using a voltmeter, touch negative lead to a good ground. Touch positive lead to each ground terminal. With vehicle running, voltmeter should indicate less than one volt. If reading is greater than one volt, check for open, corroded or loose connection on ground lead.