Circuit Open/Short Inspection

1. Inspect the following wiring harnesses for open or short circuit (continuity check).
   Fig 1: Identifying Fuel Pump Relay Connector Terminals

   Courtesy of MAZDA MOTORS CORP.

Open circuit 

• If there is no continuity, there is an open circuit. Repair or replace the harness.
  • Fuel pump unit terminal C(California emission regulation applicable model), A(Except for California emission regulation applicable model) and fuel pump relay terminal C
  • Fuel pump unit terminal B(California emission regulation applicable model), E(Except for California emission regulation applicable model) and body ground

  Short circuit 

  • If there is continuity, there is a short circuit. Repair or replace the harness.
    • Fuel pump unit terminal C(California emission regulation applicable model), A (Except for California emission regulation applicable model) and body ground
    • Fuel pump unit terminal B(California emission regulation applicable model), E(Except for California emission regulation applicable model) and power supply
  Fig 2: Identifying Fuel Pump Unit Connectors

  Courtesy of MAZDA MOTORS CORP.

  Call outs for  Fig 2 

  *1: California emission regulation applicable model

  *2: Except for California emission regulation applicable model