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Home >> Mazda >> 2022 >> 3 Base >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Introduction >> Circuit Inspection >> Inspection for Short Circuit in Circuits
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Inspection for Short Circuit in Circuits

  1. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(US)] .)
  2. Disconnect the ground plate. (For servicing Mazda M Hybrid related parts) (See GROUND PLATE DISCONNECTION/CONNECTION .)
  3. Disconnect the connector on the module side and the connector on the part side of the circuit to be inspected.
    G14587584Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • For the connector disconnection procedure, refer to the removal/installation procedure for each part in the.
  4. Inspect for continuity between the applicable terminals of the module-side or part-side connector.
    G14587585Courtesy of MAZDA MOTORS CORP.

    If there is continuity: 

    • To specify the malfunctioning location, go to the next step.

    If there is no continuity: 

    • There is no short between circuits, therefore the inspection is completed.
  5. Refer to the wiring diagram and verify if there is a common connector between the applicable circuits.

    If there is a common connector: 

    • Disconnect the common connector and inspect the connector and terminal. (See CONNECTOR INSPECTION .)
    • Inspect each common connector for continuity to determine the malfunctioning location.
      G14587586Courtesy of MAZDA MOTORS CORP.
      • Repair or replace the vehicle wiring harness which is shorted.

    If there is no common connector: 

    • Repair or replace the vehicle wiring harness.
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