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Home >> Mazda >> 2012 >> CX-9 Touring, 3.7L Eng VIN A, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [Engine Control System MZI-3.7] >> Engine Control System Operation Inspection >> Main Relay No. 1 Operation Inspection
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Main Relay No. 1 Operation Inspection

  1. Verify that the main relay clicks when the ignition switch is turned to ON position and off.
    • If there is no operation sound, inspect the following:
      • Main relay (See RELAY INSPECTION article.)
      • Harness and connector between battery and main relay terminal A.
      • Harness and connector between PCM terminal 1Q and main relay terminal E.
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