Mazda Mazda6 Workshop Manual Supplement page 379

INTERMITTENT CONCERN TROUBLESHOOTING
Vibration Method
1. If a malfunction occurs or becomes worse while driving on a rough road, or due to engine vibration, perform the
steps below.
Note
• There are several reasons 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 fire wall, body
panels, etc. are the major areas to be checked.
Inspection Method for Switch Connectors or Wires
1. Connect the WDS or equivalent to the DLC-2.
2. Turn the engine switch to ON (Engine OFF).
Note
• If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch you are inspecting.
4. Turn switch on manually.
5. Shake each connector or wire harness a bit
vertically and horizontally while monitoring the
PID.
• If the PID value is unstable, check for poor
connection.
Inspection Method for Sensor Connectors or Wires
1. Connect the WDS or equivalent to the DLC-2.
2. Turn the engine switch to ON (Engine OFF).
Note
• If engine starts and runs, perform the following steps at idle.
3. Access PIDs for the switch you are inspecting.
4. Shake each connector or wire harness a bit
vertically and horizontally while monitoring the
PID.
• If the PID value is unstable, check for poor
connection.
TROUBLESHOOTING
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