Diagnostic Circuit Check: Notes

CAUTION: Ensure ignition is off when performing resistance tests. Perform all resistance and voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm impedance, unless stated otherwise in test procedures.

NOTE: Powertrain Control Module (PCM) diagnostic memory is retained by direct power supply from battery. Memory is not erased by turning off ignition, but it will be erased if battery or PCM is disconnected. If PCM is replaced on vehicles with immobilizer system, immobilizer ECU and ignition key may also need to be replaced.

NOTE: All scan tool functions required in test procedures are available on manufacturer's MUT-II scan tool. Generic scan tools may not have the capability to carry out all tests.

NOTE: For terminal identification, see TERMINAL IDENTIFICATION . For circuit and wire color identification, see WIRING DIAGRAMS article.