Inspection Method For Switch And/Or Sensor Connectors Or Wires

WARNING: This page is about a different car, the 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Connect the WDS or equivalent to the DLC-2.
Turn the ignition switch to the ON position (engine off).
NOTE:
- If the engine starts and runs, perform the following steps at idle.
Access PIDs for the switch you are inspecting.
Turn the switch on manually.
Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID.
- If the PID value is unstable, inspect for poor connection.
  
  Fig 1: Shaking Connector Or Wiring Harness Vertically & Horizontally
  Courtesy of MAZDA MOTORS CORP.