To avoid damage to the ECM/PCM or other ignition system components, do not use electrical test equipment such as a battery or AC-powered voltmeter, ohmmeter, etc., or any type of tester other than specified.
- Check for trouble codes, as described in Section 4. If any are found, refer to the appropriate diagnostic procedure in Section 4.
- When performing electrical tests on the system, use a high impedance multimeter or quality digital voltmeter (DVM). Use of a 4 volt test light is not recommended.
- To prevent electrostatic discharge damage when working with the ECM, do not touch the connector pins or soldered components on the circuit board.
- When handling a PROM, CAL-PAK or MEM-CAL, do not touch the component leads. Also, do not remove the integrated circuit from the carrier.
- Never pierce a high tension lead or boot for any TESTING purpose; otherwise, future problems are guaranteed.
- Do not allow extension cords for power tools or droplights to lie on, near or across any vehicle electrical wiring.
- Leave new components and modules in the shipping package until ready to install them.