INTERMITTENT CONCERN TROUBLESHOOTING [LF]
VIBRATION METHOD
If malfunction occurs or becomes worse while driving on a rough road or when the engine is vibrating,
perform the steps below.
Inspection Method for Switch Connectors or Wiring Harnesses
1. Connect the M-MDS or equivalent to the DLC-2.
2. Turn the ignition switch to the ON position (Engine off).
3. Access PIDs for the switch you are inspecting.
[LF]
.)
17
Verify test results.
If normal, return to diagnostic index to service any additional
symptoms.
(See
ENGINE SYMPTOM TROUBLESHOOTING [LF]
.)
If malfunction remains, inspect related Service Bulletins and/or On-
line Repair Information and perform repair or diagnosis.
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information
is not available, replace the PCM.
(See
PCM REMOVAL/INSTALLATION [LF]
.)
NOTE:
There are several reasons vehicle or engine vibration could cause an
electrical malfunction. Inspect the following:
Connectors not fully seated
Wiring harnesses not having full play
Wiring harnesses laying across brackets or moving parts
Wiring harnesses 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.
NOTE:
If the engine starts and runs, perform the following steps during idle.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
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