Note. For circuit reference, see WIRING DIAGRAMS - 4.3L article.
Circuit Description
This DTC indicates that VCM's internal program memory has not been flashed with any vehicle software. If a replacement VCM is installed and not flashed, engine will not run. This DTC is used to indicate that engine cranks, but will not run due to an unflashed VCM.
Conditions for setting DTC
- No software data is present in VCM.