Mazda 3 Workshop Manual page 156

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
INSPECT THROTTLE BODY PASSAGE
• Remove the throttle body.
8
(See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION
• Is throttle body clogged?
INSPECT PURGE SOLENOID VALVE
• Inspect the purge solenoid valve.
9
(See PURGE SOLENOID VALVE
INSPECTION.)
• Is there any malfunction?
INSPECT IAT SENSOR
• Inspect the IAT sensor.
10
(See INTAKE AIR TEMPERATURE (IAT)
SENSOR INSPECTION
• Is there any malfunction?
INSPECT ECT SENSOR
• Inspect the ECT sensor.
11
(See ENGINE COOLANT TEMPERATURE
(ECT) SENSOR INSPECTION
• Is there any malfunction?
INSPECT CKP SENSOR
• Inspect the CKP sensor.
12
(See CRANKSHAFT POSITION (CKP)
SENSOR INSPECTION
• Is there any malfunction?
INSPECT ENGINE COMPRESSION
• Inspect the engine compression.
13
(See COMPRESSION INSPECTION
• Is there any malfunction?
INSPECT OIL PUMP
• Inspect the oil pump.
14
(See OIL PUMP INSPECTION
• Is there any malfunction?
15 INSPECT ENGINE OIL CONDITION
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Yes
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No Go to the next step.
Yes
No Go to the next step.
Yes
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No Go to the next step.
Yes
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No Go to the next step.
Yes
[Z6].)
No Go to the next step.
Yes Go to the next step.
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No Go to Step 16.
Yes
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No Go to the next step.
Yes Go to the next step.
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Clean the throttle body passage or replace the
throttle body, then go to Step 19.
(See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION
Replace the purge solenoid valve, then go to
Step 19.
(See PURGE SOLENOID VALVE
REMOVAL/INSTALLATION
Replace the MAF/IAT sensor, then go to Step
19.
(See MASS AIR FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION
Replace the ECT sensor, then go to Step 19.
(See ENGINE COOLANT TEMPERATURE
(ECT) SENSOR REMOVAL/INSTALLATION
[Z6].)
Replace the CKP sensor, then go to Step 19.
(See CRANKSHAFT POSITION (CKP)
SENSOR REMOVAL/INSTALLATION
Repair or replace the malfunctioning part
according to the inspection results.
Overhaul or replace the engine.
Then go to Step 19.
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