Checking sealing quality of system
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Proceed as follows if a fine or large leak was found during the functional test of the EVAP canister assembly.
- Check whether cap of fuel tank is completely closed and whether sealing ring is leaking; replace if necessary.
- Repeat functional test.
If the malfunction is still present:
- Fold rear seat bench forward.
- Remove cover under seat bench.
- Check whether union nut of fuel delivery unit is tight and whether sealing ring is leaking; replace as necessary.
- Retighten union nut with Union nut tool 3217. Check feed and return lines of fuel delivery unit for leaks.
- Repeat functional test.
If the malfunction still exists:
- Remove right rear wheel housing liner: Refer to 66 EXTERIOR EQUIPMENT
- Check discharge hose for leaks between leak detection pump and EVAP canister. Replace if necessary
- Check lines and connections for leaks between EVAP canister and fuel filler door and EVAP canister purge regulator valve, refer to Evaporative emissions system, diagram .
- Repeat functional test.
If the malfunction is still present:
- Remove EVAP canister and check for cracks and leaks; replace if necessary.
- Repeat functional test.