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Testing Procedure: 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 cleared/erased by turning off ignition, but it will be cleared/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: The following procedure requires functions available on manufacturer's MUT-II scan tool (MB991502). Generic scan tools may not have capability to carry out all tests.
NOTE: For PCM terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.