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: Service Precautions

CONTROL UNIT DAMAGE PRECAUTIONS;
- Do not try to disassemble the control unit.
- Before performing electrical welding, disconnect the battery, climate control, injection, cruise control, control unit, and radio.
- If temperatures may exceed 176°F (80°C), remove all control units.
- Avoid getting water on any fuel and engine control system components.
- Never apply battery power to a component unless directed to do so in a test procedure.