Mazda 6 2002, Руководство по ремонту

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ON-BOARD DIAGNOSTIC
F–109
F
3 VERIFY RELATED PENDING AND STORED
DTCS
•
Turn ignition key to OFF, then ON (Engine
OFF).
•
Verify pending and /or stored DTCs using WDS
or equivalent.
•
Is DTC P0443 also present?
Yes Go to DTC P0443 troubleshooting procedures, then go to
Step 13.
No Go to next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME
DATA
•
Is DTC P0133 on FREEZE FRAME DATA?
Yes Go to next step.
No Go to troubleshooting procedures for DTC on FREEZE
FRAME DATA.
(See
F–67 DTC TABLE .)
5 VERIFY CURRENT INPUT SIGNAL STATUS
•
Warm up engine.
•
Access O2S11 PID using WDS or equivalent.
•
Inspect PID under following accelerator pedal
conditions (in PARK (ATX) or NEUTRAL
(MTX)).
•
Is PID reading okay?
—
More than 0.55 V when suddenly depress
accelerator pedal (rich condition).
— Less than 0.55 V just after release of
accelerator pedal (lean condition).
Yes Go to step 8.
No Go to next step.
6 INSPECT INSTALLATION OF FRONT HO2S
•
Inspect if front HO2S is loosely installed.
•
Is sensor installed securely?
Yes Go to next step.
No Retighten sensor, then go to Step 13.
7 INSPECT GAS LEAKAGE FROM EXHAUST
SYSTEM
•
Visually check if any gas leakage is found
between exhaust manifold and front HO2S.
•
Is there any gas leakage?
Yes Repair or replace any faulty exhaust parts, then go to Step
13.
No Replace sensor, then go to Step 13.
8 INSPECT LONG TERM FUEL TRIM
•
Access LONGFT1 PIDs
•
Compare it with FREEZE FRAME DATA
recorded at Step 1.
•
Is it below FFD value?
Yes Engine is driven under rich condition. Go to next step.
No Engine is driven under lean condition. Go to step 10.
9 INSPECT FUEL LINE PRESSURE (Excessive
fuel line pressure)
•
Turn ignition key to OFF.
•
Inspect fuel line pressure while engine running.
(See
F–20 FUEL LINE PRESSURE
INSPECTION .)
•
Is fuel line pressure okay?
Yes Go to next step.
No Inspect fuel pump maximum pressure and fuel return pipe
for clogging.
(See
F–25 FUEL PUMP UNIT INSPECTION .)
•
If any problem is found, repair or replace suspected
parts.
•
If all items above are okay, replace fuel pump unit.
Then go to Step 13.
10 INSPECT FUEL LINE PRESSURE (Low fuel line
pressure)
•
Turn ignition key to OFF.
•
Inspect fuel line pressure while engine running.
(See
F–20 FUEL LINE PRESSURE
INSPECTION .)
•
Is fuel line pressure okay?
Yes Go to step 13.
No Go to next step.
11 INSPECT FUEL LINE FROM FUEL PUMP TO
FUEL DELIVERY PIPE
•
Visually inspect fuel line for any leakage.
•
Is any fuel leakage found?
Yes Replace suspected fuel line, then go to Step 13.
No Inspect fuel filters for following:
•
Restriction or clogging at fuel filter (high-pressure side)
•
Foreign materials or stain inside fuel filter (low-pressure
side)
Perform following actions according to result.
•
If restriction or clogging is found at fuel filter (high-
pressure side), replace fuel filter.
•
If foreign material or stain is found inside fuel filter (low-
pressure side), clean of fuel tank and filter.
•
If all items above are okay, replace pressure regulator.
Then go to Step 13.
STEP INSPECTION ACTION