No.15 Emission Compliance - Mazda 2002 6 Workshop Manual

NO.15 EMISSION COMPLIANCE

15 EMISSION COMPLIANCE
DESCRIPTION Fails emissions test.
• Vacuum lines leakage or blockage
• Cooling system malfunction
• Spark plug malfunction
• Leakage from intake manifold
• Erratic or no signal from CMP sensor
• Inadequate fuel pressure
• PCV valve malfunction or incorrect valve installation
• EGR valve malfunction
• Exhaust system clogging
• Fuel tank ventilation system malfunction
• Charcoal canister damage
• Air cleaner element clogging or restriction
• Throttle body malfunction
• Spark leakage from high-tension leads
• Improper air/fuel mixture ratio control operation
• Catalyst converter malfunction
• Engine internal parts malfunction
• Excessive carbon is built up in combustion chamber
• Improper engine compression
POSSIBLE CAUSE
• Improper valve timing
Warning
The following troubleshooting flow chart contains fuel system diagnosis and repair
procedures. Read following warnings before performing fuel system services:
• Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always
• Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or
Caution
• Disconnecting/connecting quick release connector without cleaning it may possibly cause
Diagnostic procedure
STEP INSPECTION
1 Inspect for following:
• Vacuum lines for leakage or blockage
• Electrical connections
• Proper maintenance schedule followed
• Intake-air system and air cleaner element
concerns: obstructions, leakage or dirtiness
Are all items okay?
2 Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed?
3 Is any other drivability concern present?
4 Connect WDS or equivalent to DLC-2.
Access ECT PID.
Warm up engine and run it at idle.
Verify ECT PID is correct.
(See F–45 PCM INSPECTION.)
Is ECT PID correct?
TROUBLESHOOTING
keep sparks and flames away from fuel.
death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete
"BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this
manual.
(See F–17 BEFORE REPAIR
(See F–17 AFTER REPAIR
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
PROCEDURE.)
PROCEDURE.)
RESULTS
Yes Go to next step.
No Service as necessary.
Repeat Step 1.
Yes DTC is displayed:
Go to appropriate DTC test.
No No DTC is displayed:
Go to next step.
Yes Go to appropriate symptom troubleshooting.
No Go to next step.
Yes Go to next step.
No Inspect for coolant leakage, cooling fan and condenser
fan operation or thermostat operation.
A6E398018881W17
ACTION
F–213
F