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Home >> Mazda >> 2010 >> 3 Mazdaspeed, 2.3 3 >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting [L3 With TC] - Engine >> Engine Control System Operation Inspection >> Main Relay Operation Inspection

Main Relay Operation Inspection

  1. Verify that the main relay clicks when the ignition is switched to ON and then to off.
    • If there is no operation sound, inspect the following:
      • Main relay (See RELAY INSPECTION .)
      • Wiring harness and connector between battery positive terminal and main relay terminal A
      • Wiring harness and connector between PCM terminal 1AT and main relay terminal B
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