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Home >> Mazda >> 2022 >> 3 Base >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Introduction >> Circuit Inspection >> Inspection for Open Circuit in Circuit >> Circuit between module and part
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Circuit between module and part

  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.
    G14587577Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • For the connector disconnection procedure, refer to the removal/installation procedure for each part in the Appropriate Service Information.
  4. Inspect for continuity between the applicable terminals of the module-side connector and the part-side connector.
    G14587578Courtesy of MAZDA MOTORS CORP.
    NOTE:
    • If the inspection is difficult due to the distance between the module-side and part-side connectors being too far, the inspection can be performed using only one of the connectors by shorting one of the connector terminals using a jumper wire.
    G14587579Courtesy of MAZDA MOTORS CORP.

    If there is continuity: 

    • There is no open circuit in the circuit, therefore the inspection is completed.

    If there is no continuity: 

    • To specify the malfunctioning location, go to the next step.
  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 .)
      G14587580Courtesy of MAZDA MOTORS CORP.
    • Inspect each common connector for continuity to determine the malfunctioning location.
      • Repair or replace the vehicle wiring harness which has an open circuit.

    If there is no common connector: 

    • Repair or replace the vehicle wiring harness.