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 spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Voltage Signal: Description and Operation

PURPOSE

Supplies Powertrain Control Module (PCM), with current charging system voltage.

OPERATION

If the PCM senses low battery voltage:

- PCM increases injector pulse width to compensate for low voltage.

- PCM increases generator field voltage.

If the PCM senses high battery voltage:

- PCM decreases injector pulse width to compensate for high voltage.

- PCM decreases generator field voltage.