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.