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

Engine Control Module: Testing and Inspection

ECM Connector Identification:

ECM CONNECTOR PIN-VOLTAGE CHECK

1. Check voltage at the connector terminals as listed, under the stated conditions with the ECM connected. Measure voltage with a DVOM through a "break-out box" or use a straight pin inserted from the back of the connector into the appropriate terminal.

CAUTION: Do not short between terminals! Damage to the ECM may result.