Mazda 6 2002, Руководство по ремонту

Страница: 352 / 1248

F–222
TROUBLESHOOTING
End Of Sie
NO.26 EXHAUST SULPHUR SMELL
A6E398018881W28
Diagnostic procedure
2 Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed? Yes DTC is displayed:
Go to appropriate DTC test.
No No DTC is displayed:
Inspect TP sensor for proper adjustment.
3 Verify test results.
•
If okay, return to diagnostic index to service any additional symptoms.
•
If malfunction remains, replace PCM.
STEP INSPECTION RESULTS ACTION
26 EXHAUST SULPHUR SMELL
DESCRIPTION Rotten egg smell (sulphur) from exhaust
POSSIBLE CAUSE
•
Electrical connectors are disconnected or connected poorly
•
Charcoal canister malfunction
•
Vacuum lines are disconnected or connected improperly.
•
Improper fuel pressure
•
Poor fuel quality
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
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
F–17 BEFORE REPAIR PROCEDURE .)
(See F–17 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 Are any driveability or exhaust smoke concerns
present? Yes Go to appropriate flow chart.
No Go to next step.
2 Inspect following:
•
Electrical connections
•
Vacuum lines
•
Fuel quality
Are all items okay?
Yes Go to next step.
No Service as necessary.
Repeat Step 2.
3 Connect WDS or equivalent to DLC-2.
Retrieve any continuous memory, KOEO and
KOER DTCs.
Are there any DTCs displayed? Yes DTC is displayed:
Go to appropriate DTC test.
No No DTC is displayed:
Go to next step.
4 Install fuel pressure gauge between fuel pipe
and fuel distributor.
Start engine and run it at idle.
Is fuel line pressure correct at idle?
(See
F–20 FUEL LINE PRESSURE
INSPECTION )
Yes Go to next step.
No Zero or low:
Inspect for clogged fuel line.
If okay, replace fuel pump unit.
High:
Replace fuel pump unit.
5 Inspect charcoal canister for fuel saturation.
Is excess amount of liquid fuel present in
canister? Yes Replace charcoal canister.
No Inspect fuel tank vent system.
If fuel tank vent system is okay, since sulfur content
can vary in different fuels, suggest trying a different
brand.
If fuel tank vent system is not okay, repair or replace
malfunctioning parts.
6 Verify test results.
•
If okay, return to diagnostic index to service any additional symptoms.
•
If malfunction remains, replace PCM.