Mazda 3 Workshop Manual page 459

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Connect the WDS or equivalent to the
DLC-2.
11 Access RPM PID.
Is RPM PID indicating the engine speed
while the engine is cranking?
Visually inspect the CKP sensor and
teeth of the crankshaft pulley.
12
Are the CKP sensor and teeth of the
crankshaft pulley normal?
Measure gap between the CKP sensor
and teeth of crankshaft pulley.
Specification
13
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
14
short circuit) for all cylinders.
Are wiring harness conditions normal?
Perform the spark test.
(See Spark Test.)
15
Is strong blue spark visible at each
cylinder?
Inspect the spark plug condition.
16
Is the spark plug wet, covered with
carbon or grayish white?
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Go to the next step.
Inspect for the following:
• Open or short circuit in CKP sensor
• Open or short circuit between CKP
sensor terminal A and PCM terminal 2T
• Open or short circuit between CKP
sensor terminal B and PCM terminal 2P
• Open or short circuit between CKP
sensor terminal C and PCM terminal 2BF
• 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 part.
Go to the next step.
Replace the crankshaft pulley.
Go to the next step.
Repair the wiring harnesses.
Go to the next step.
If symptom occurs with the A/C on, go to
Step 21.
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.
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