Vibration method

• If malfunction occurs or becomes worse while driving on a rough road or when engine is vibrating, perform the steps below.
  NOTE:

  • There are several reasons why vehicle or engine vibration could cause an electrical malfunction. Some of the things to check for are:
    • Connectors not fully seated.
    • Wire harnesses not having full play.
    • Wires laying across brackets or moving parts.
    • Wires routed too close to hot parts.
  • An improperly routed, improperly clamped, or loose harness can cause wiring to become pinched between parts.
  • The connector joints, points of vibration, and places where wire harnesses pass through the firewall, body panels, etc. are the major areas to be checked.

Inspection method for switch and/or sensor connectors or wires

1. Connect the M-MDS to the DLC-2.
2. Switch the ignition to ON (engine off).
   NOTE:

   • If the engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch or sensor you are inspecting.
4. Turn the switch on manually.
5. Slightly shake each connector or wiring harness vertically and horizontally while monitoring the PID.

   Courtesy of MAZDA MOTORS CORP.

   • If the PID value is unstable, inspect for poor connection.

Inspection method for switches and/or sensors

1. Connect the M-MDS to the DLC-2.
2. Switch the ignition to ON (engine off).
   NOTE:

   • If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch or sensor you are inspecting.
4. Vibrate the sensor slightly with your finger.
   • If PID value is unstable or malfunction occurs, check for poor connection and/or poorly mounted sensor.