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CMTC Test 5A - CMTC Mileage Inoperative Or Wrong

NOTE: Perform CMTC TEST 1A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAM. Perform TEST VER-1A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
  1. Turn ignition on, engine off. Using scan tool, select ENGINE. If scan tool displays NO RESPONSE, go to TEST 9A  under VEHICLE COMMUNICATIONS. If scan tool does not display NO RESPONSE, go to next step.
  2. Using scan tool, read PCM trouble codes. If any related codes are present, see the TESTS W/CODES article in the ENGINE PERFORMANCE section. If no codes are present, system is currently operating correctly.
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