NO.15 EMISSION COMPLIANCE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))


15	Emission compliance
DESCRIPTION	• Emission compliance test is failed.
POSSIBLE CAUSE	• 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 • Excessive carbon built up in combustion chamber • Improper engine compression • Improper valve timing Warning • The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: - Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. - Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or 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 BEFORE SERVICE PRECAUTION [AJ].) (See AFTER SERVICE PRECAUTION [AJ].)


STEP	INSPECTION		ACTION
1	• Inspect 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 normal?	Yes	Go to next step.
1		No	Service as necessary. Repeat Step 1.
2	• Connect WDS or equivalent to DLC-2. • Turn ignition switch to ON (Engine OFF). • Retrieve any DTCs. • Is "PASSED" displayed?	Yes	No DTC is displayed: • Go to next step.
2		No	DTC is displayed: • Go to appropriate DTC test.
3	• Is any other drivability concern present?	Yes	Go to appropriate symptom troubleshooting.
3	• Is any other drivability concern present?	No	Go to next step.
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 PCM Inspection Using the SST (WDS or equivalent).) • Is ECT PID correct?	Yes	Go to next step.
4		No	Inspect for coolant leakage. Inspect cooling fan and operation or thermostat operation.
5	• Perform spark test. (See Spark Test.) • Is strong blue spark visible at each cylinder?	Yes	Inspect for following: • Spark plugs malfunction • CMP sensor is installed improperly. • Damage of trigger wheel on camshaft • Open or short circuit on CMP sensor • Open or short circuit between CMP sensor and PCM terminal 2 or 28 Repair or replace malfunctioning part. • If normal, go to next step.
5		No	Repair or replace malfunctioning part according to spark test results.
6	• Install fuel pressure gauge between pulsation damper and fuel distributor. • Start engine and run it at idle. • Measure fuel line pressure at idle. • Is fuel line pressure correct at idle? (See FUEL LINE PRESSURE INSPECTION [AJ].)	Yes	Go to next step.
6		No	Zero or low: • Inspect fuel pump circuit. • Inspect for open fuel pump relief valve. • Inspect for fuel leakage inside pressure regulator. • Inspect for clogged main fuel line. High: • Inspect pressure regulator for high pressure cause. • Inspect for clogged fuel return line.
7	• Remove and shake PCV valve. • Does PCV valve rattle?	Yes	Go to next step.
7	• Remove and shake PCV valve. • Does PCV valve rattle?	No	Replace PCV valve.
8	• Inspect for fuel saturation inside charcoal canister. • Is excess amount of liquid fuel present in canister?	Yes	Replace charcoal canister.
8		No	Inspect fuel tank vent system. Then, go to next step.
9	• Inspect for restriction in the exhaust system. • Is there any restriction?	Yes	Inspect exhaust system.
9		No	Inspect EGR system.
10	• Verify test results. - If normal, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Information and perform repair or diagnosis. • If vehicle is repaired, troubleshooting completed. • If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram PCM.