Mazda RX-8 Workshop Manual page 650

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2011 - RX-8 - Engine
INTERMITTENT CONCERN TROUBLESHOOTING [13B-MSP]
Vibration Method
If a malfunction occurs or becomes worse while driving on a rough road or when the
engine is vibrating, perform the steps below.
NOTE:
Inspection Method for Switch Connectors or Wires
1. Connect the M-MDS to the DLC-2.
2. Turn the ignition switch to the ON position (engine off).
NOTE:
If the engine starts and runs, perform the following steps at idle.
3. Access the PIDs for the switch you are inspecting.
4. Turn the switch on manually.
5. Shake each connector or wiring harness a bit vertically and horizontally while monitoring the
PID.
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.
Wiring 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 wiring harness can
cause wiring to become pinched between parts.
The connector joints, points of vibration, and places where wiring
harnesses pass such as through the firewall and body panels are the
major areas to be checked.