NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)


20	FUEL ODOR (IN ENGINE COMPARTMENT)
DESCRIPTION	Gasoline fuel odor or visible leakage
POSSIBLE CAUSE	• Excessive fuel pressure • Purge solenoid valve malfunction • Fuel tank vent system blockage/restriction or opening • Charcoal canister malfunction • Charcoal canister improper installation • Fuel leakage from fuel system Warning The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing fuel system: • 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 REPAIR PROCEDURE.) (See AFTER REPAIR PROCEDURE.) Caution • Disconnecting/connecting quick release connector without cleaning it may possibly cause 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.


STEP	INSPECTION	RESULTS	ACTION
1	Inspect for blockage/restriction or opening between the engine vacuum port and the charcoal canister. Inspect for blockage/restriction or opening in the fuel tank vent system. Is fault indicated?	Yes	Replace the vacuum hose.
1		No	Go to the next step.
2	Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION.) Is the solenoid operating properly?	Yes	Go to the next step.
2		No	Replace the purge solenoid valve.
3	Visually inspect for fuel leakage at the fuel injector O-ring and the fuel line. Service if necessary. Install the fuel pressure gauge between the fuel pipe and the fuel distributor. Start engine and run it at idle. Measure the fuel line pressure at idle. Is the fuel line pressure correct at idle? (See FUEL LINE PRESSURE INSPECTION.)	Yes	Go to the next step.
3		No	Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.)
4	Verify that charcoal canister is installed properly. Is the charcoal canister installed properly?	Yes	Go to the next step.
4		No	Install the charcoal canister properly.
5	Inspect for air leakage from the charcoal canister. (See CHARCOAL CANISTER INSPECTION.) Is there air leakage from the charcoal canister?	Yes	Replace the charcoal canister.
5		No	Go to the next step.
6	Connect the WDS or equivalent to the DLC-2. Retrieve any continuous memory, KOEO and KOER DTCs. Are there any DTCs displayed?	Yes	DTC is displayed: Go to the applicable DTC inspection. (See DTC TABLE.)
6		No	No DTC is displayed: Inspect the charcoal canister for fuel saturation. If there is an excess amount of liquid fuel present, replace the charcoal canister.
7	Verify test results. • If normal, return to the diagnostic index to service any additional symptoms. • If the malfunction remains, inspect the related Service Information and perform the repair or diagnosis.