Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 1999 >> Astro Van L AWD V6-4.3L VIN W >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Ignition 1 on
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Ignition 1 on

YES/NO
The Ignition 1 On parameter indicates when the VCM is detecting Ignition voltage. The normal Ignition voltage is approximately 13.8 volts, but may vary between 11-16 volts. The VCM monitors the Ignition voltage to compensate for low voltage operation of the injectors and to increase the dwell time of the ignition coil.
pro multis · About Operation CHARM