Mazda 3 Workshop Manual page 483

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Connect the WDS or equivalent to the
DLC-2.
Access RPM, VPWR, MAF, TP and
VSS PIDs.
4
Drive vehicle with monitoring PIDs.
Are PIDs within specifications?
(See PCM INSPECTION
Visually inspect the CKP sensor and
teeth of the crankshaft pulley.
5
Are the CKP sensor and teeth of the
crankshaft pulley normal?
Measure gap between the CKP sensor
and teeth of the crankshaft pulley.
Specification
6
0.5-1.5 mm {0.02-0.05 in}
Is gap within specification?
Inspect the spark plug conditions.
7
Is the spark plug wet, covered with
carbon or grayish white?
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Yes
No
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Yes
No
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No
Yes
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Go to the next step.
Go to the next step.
RPM PID:
Inspect the CKP sensor and related harness
for such as vibration, intermittent open/short
circuit.
VPWR PID:
Inspect for open circuit intermittently.
MAF PID:
Inspect for open circuit of the MAF sensor
and related wire harness intermittently.
TP PID:
Inspect if output signal from the TP sensor
changes smoothly.
VSS PID:
Inspect for open circuit of the VSS and
related wire harness intermittently. (except
MTX with ABS)
Inspect the ABS or DSC system . (MTX with
ABS)
Go to the next step.
Replace the malfunctioning part.
Go to the next step.
Replace the crankshaft pulley.
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.
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