Mazda 3 Workshop Manual page 466

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Visually inspect the CKP sensor and teeth
of the crankshaft pulley.
13
Are the CKP sensor and teeth of the
crankshaft pulley normal?
Measure the gap between the CKP sensor
and teeth of the crankshaft pulley.
Specification
14
0.5-1.5 mm {0.02-0.05 in}
Is the gap within specification?
Inspect the ignition coil related wiring
harness condition (intermittent open or
15
short circuit) for all cylinders.
Are wiring harness conditions normal?
Perform the spark test.
(See Spark Test.)
16
Is strong blue spark visible at each
cylinder?
Inspect the spark plug conditions.
17
Is the spark plug wet, covered with carbon
or grayish white?
Remove and shake the PCV valve.
18
Does the PCV valve rattle?
Visually inspect the exhaust system part.
19
Is there any deformed exhaust system
part?
20
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• Open or short circuit in CKP sensor
wiring harnesses
If the CKP sensor and wiring harness
are normal, go to the next step.
Go to the next step.
Replace the malfunctioning crankshaft
pulley.
Go to the next step.
Replace the crankshaft pulley.
Go to the next step.
Repair the wiring harnesses.
Go to the next step.
Repair or replace the malfunctioning
part according to spark test result.
Spark plug is wet or covered with
carbon:
Inspect for fuel leakage from the fuel
injector.
Spark plug is grayish white:
Inspect for clogged the fuel injector.
Install the spark plugs on original
cylinders.
Go to the next step.
Go to the next step.
Replace the PCV valve.
Replace the suspected part.
Go to the next step.
Go to the next step.
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