Ground Circuits
WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2002 Saturn SL2, 2002 Saturn SL1, 2002 Saturn SL, 2002 Saturn SC2, and 2002 Saturn SC1. However, it is still accessible from the selected car via links, so may be relevant.
- Using DVOM, check for continuity to ground at PCM ground terminals. For connector terminal identification, see appropriate SELF-DIAGNOSTICS article. See WIRING DIAGRAMS article. Resistance should be less than 5 ohms. If resistance is not less than 5 ohms, repair open in ground circuit.
- Connect negative lead of DVOM to a known-good ground. Backprobe positive lead of voltmeter to each PCM ground terminal. With vehicle running, DVOM should indicate less than one volt. If DVOM reading is greater than one volt, check for open, short to voltage, corrosion or loose connection in ground circuit.