Circuit Open/Short Inspection

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the following wiring harnesses for open or short circuit (continuity check).
1. Open circuit
  - If there is no continuity, there is an open circuit. Repair or replace the harness.
    - Fuel pump unit terminal A and fuel pump relay terminal C
    - Fuel pump unit terminal E and body GND (except for California emission regulation applicable model)
    - Fuel pump unit terminal B and body GND (for California emission regulation applicable model)
2. Short circuit
  - If there is continuity, there is a short circuit. Repair or replace the harness.
    - Fuel pump unit terminal A and body GND
    - Fuel pump unit terminal E and power supply (except for California emission regulation applicable model)
    - Fuel pump unit terminal B and power supply (for California emission regulation applicable model)
      
      Fig 1: Identifying Fuel Pump Relay & Fuel Pump Unit Connector Terminals
      Courtesy of MAZDA MOTORS CORP.