Mazda 2002 6 Workshop Manual page 323

STEP INSPECTION
14 Connect WDS or equivalent to DLC-2.
Access RPM PID.
Is RPM PID indicating engine speed during
engine cranking?
15 Visually inspect CKP sensor and teeth of
crankshaft pulley.
Are CKP sensor and teeth of crankshaft pulley
okay?
16 Measure gap between CKP sensor and teeth of
crankshaft pulley.
Specification
0.5—1.9 mm {0.020—0.075 in}
Is gap within specification?
17 Inspect for cracks on high-tension leads.
Are there any cracks on high-tension leads?
18 Is strong blue spark visible at each disconnected
high-tension lead while cranking engine?
19 Inspect spark plug condition.
Is spark plug wet, covered with carbon or
grayish white?
20 Remove and shake PCV valve.
Does PCV valve rattle?
21 Inspect for restriction in the exhaust system.
Is there any restriction?
22 Install fuel pressure gauge between fuel pipe
and fuel distributor.
Connect jumper wire between F/P terminal at
DLC-2 in engine compartment and GND.
Turn ignition switch to ON position.
Is fuel line pressure correct with ignition switch
ON?
(See F–20 FUEL LINE PRESSURE
INSPECTION)
23 Visually inspect for fuel leakage at fuel injector
O-ring and fuel line. Service as necessary.
Is fuel line pressure held after ignition switch is
turned off?
(See F–20 FUEL LINE PRESSURE
INSPECTION)
TROUBLESHOOTING
RESULTS
Yes Go to next step.
No Inspect for following:.
• Open or short circuit in CKP sensor
• Open or short circuit between CKP sensor and
PCM terminal 2C or 2D
• Open or short circuit in CKP sensor harnesses
If CKP sensor and harness are okay, go to next step.
Yes Go to next step.
No Replace malfunctioning parts.
Yes Go to next step.
No Adjust CKP sensor.
Yes Repair suspected high-tension leads.
No Go to next step.
Yes Go to next step.
If symptom occurs with A/C on, go to Step 24.
No Inspect for following:
• Open or short circuit in ignition coil
• Open circuit in high-tension leads
• Open circuit between ignition coil connector GND
terminal and body GND
• Open circuit between ignition switch and ignition
coil
• Open circuit between ignition coil and PCM
terminal 1A or 1B
Yes Spark plug is wet or covered with carbon:
Inspect for fuel leakage from injector.
Spark plug is grayish white:
Inspect for clogged fuel injector.
No Install spark plugs on original cylinders.
Go to next step.
Yes Go to next step.
No Replace PCV valve.
Yes Inspect exhaust system.
No Go to next step.
Yes Go to next step.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
Yes Go to next step.
No Inspect fuel injector.
If fuel injector is okay, replace fuel pump unit.
ACTION
F–193
F