Inspection method for sensor connectors or wires

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.
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: Checking Sensor Connector Or Wiring Harness By Shaking
Courtesy of MAZDA MOTORS CORP.