Diagnostic Aids

Check wiring for poor connections at PCM connector and transmission. Check for bent, backed out or broken terminals, or misaligned connectors. Inspect for damaged VSS or for damaged output speed sensor rotor teeth. Check for moisture and corrosion. Ensure VSS is aligned correctly and secured to transmission case properly. If diagnosing for intermittent short or open condition, move wiring harness while observing scan tool for value changes.