NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) [MZR 1.6]

id0103f9802600

20

FUEL ODOR (IN ENGINE COMPARTMENT)
DESCRIPTION
•  Gasoline fuel smell or visible leakage.
POSSIBLE CAUSE
•  Excessive fuel pressure
•  Fuel leakage from fuel system
•  Fuel tank vent system blockage
•  Purge solenoid valve malfunction
•  Continuous memory DTC is stored
•  Charcoal canister malfunction
•  PCM malfunction
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 the "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [MZR 1.6].) (See AFTER SERVICE PRECAUTION [MZR 1.6].)
Caution
•  If there is foreign material on the connecting area of the quick release connector, it might damage the connector or fuel pipe. To prevent this, disconnect the connector and clean the connecting area before connecting.

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
Visually inspect for fuel leakage at the fuel injector O-ring and fuel line.
Install the fuel pressure gauge between fuel pipe and fuel distributor.
Start the engine and idle it.
Measure the fuel line pressure at idle.
Is the fuel line pressure correct at idle?
(See FUEL LINE PRESSURE INSPECTION [MZR 1.6].)
Yes
Go to the next step.
No
Replace the fuel pump unit.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZR 1.6].)
2
Inspect for blockage/restriction in vacuum hose between the engine vacuum port and the charcoal canister.
Inspect for blockage in the fuel tank vent system.
Is there any malfunction?
Yes
Replace the vacuum hose.
No
Go to the next step.
3
Inspect the purge solenoid valve operation.
(See PURGE SOLENOID VALVE INSPECTION [MZR 1.6].)
Is there any malfunction?
Yes
Replace the purge solenoid valve.
(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 1.6].)
No
Go to the next step.
4
Connect the M-MDS to the DLC-2.
Perform the KOEO or KOER self test.
(See KOEO/KOER SELF TEST [MZR 1.6].)
Are any continuous memory DTCs present?
Yes
Go to the appropriate DTC inspection.
(See DTC TABLE [MZR 1.6].)
No
Inspect the charcoal canister for fuel saturation.
(See CHARCOAL CANISTER INSPECTION [MZR 1.6].)
•  If excess amount of liquid fuel is present:
―  Replace the charcoal canister.
5
Verify the test results.
•  If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [MZR 1.6].)
•  If malfunction remains, inspect related Service information perform repair or diagnosis.
―  If vehicle repaired, troubleshooting completed.
―  If vehicle not repaired or additional diagnostic information not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 1.6].)