NO.26 INTERMITTENT CONCERNS [F2]
id010394851900
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26 |
INTERMITTENT CONCERNS |
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DESCRIPTION
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Symptom occurs randomly and is difficult to diagnose.
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Diagnostic procedure
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STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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Talk to customer.
Retrieve vehicle service history.
Does vehicle have a number of previous repairs and components replaced for a certain symptom?
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Yes
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Go to the next step.
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No
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Go to Symptom Index.
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2
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Connect the M-MDS to the DLC-2.
If input is switch-type component, turn on manually
Turn the ignition switch to the ON position.
Access PIDs for suspect component.
Lightly tap on suspect component, wiggle and pull each wire/connector ar suspect component or PCM.
Are any PID values out of range, or do they suddenly change and go back into range?
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Yes
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Inspect each wire for corrosion, bent or loose terminal crimps.
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No
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Go to the next step.
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3
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Start engine.
Lightly tap on suspect component, wiggle and pull each wire/connector at suspect component or PCM.
Are any PID values out of range, or do they suddenly change and go back into range?
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Yes
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Inspect each wire for corrosion, bent or loose terminal crimps.
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No
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Go to the next step.
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4
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Start engine.
Accurately spray water on suspect component wire, component or vacuum line related to possible fault area.
Are any PID values out of range, or do they suddenly change and go back into range, or was there a noticeable engine misfire/stumble?
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Yes
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Fuel occurred while spraying component:
Replace part and verify repair.
Fuel occurred while spraying wiring:
Inspect each wire for corrosion, bent or loose terminals and poor wire terminal crimps.
Fuel occurred while spraying vacuum line:
Repair vacuum hoses.
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No
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Inspect wire and connector at suspect component for corrosion, bent or loose terminals, poor wire terminal crimps and high tension of wire.
Repair if necessary.
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