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.

Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .)
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 wiring harness.
    - Purge solenoid valve terminal A and PCM terminal 2AN
    - Purge solenoid valve terminal B and main relay terminal B
      
      Fig 1: Identifying Purge Solenoid Valve & PCM Connector Terminals
      Courtesy of MAZDA MOTORS CORP.
2. Short circuit
  - If there is no continuity, there is a short circuit. Repair or replace the wiring harness.
    - Purge solenoid valve terminal A and body GND