Mazda 3 Workshop Manual page 404

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
VERIFY CURRENT INPUT SIGNAL
STATUS OF FRONT HO2S
• Connect the WDS or equivalent to the
DLC-2.
• Start the engine and warm it up
completely.
• Access O2S11 PID.
• Read O2S11 PID under following
accelerator pedal condition (in NEUTRAL).
- More than 0.45 V when
accelerator pedal is suddenly
depressed (rich condition).
- Less than 0.45 V just after
release of accelerator pedal (lean
condition)
• Is the PID normal?
INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE
INSPECTION".
9
(See FUEL LINE PRESSURE
INSPECTION.)
• Is there any malfunction?
INSPECT LONG TERM FUEL TRIM
• Connect the WDS or equivalent to the
DLC-2.
• Access LONGFT1 PID.
10
• Compare the LONGFT1 PID with recorded
FREEZE FRAME DATA at Step 1.
• Is the LONGFT1 PID above FREEZE
FRAME DATA?
VERIFY TROUBLESHOOTING OF DTC
P2097 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory
11
using the WDS or equivalent.
• Perform the PCM Adaptive Memory
Produce Drive Mode.
(See OBD DRIVE MODE
Downloaded from
No
Yes
No Go to the next step.
Yes
No Go to the next step.
Yes
No Go to the next step.
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Visually inspect for exhaust gas leakage
between the exhaust manifold and front
HO2S.
• If there is no leakage, replace front HO2S.
(See HEATED OXYGEN SENSOR (HO2S)
REMOVAL/INSTALLATION
Then go to Step 11.
Replace the fuel pump unit, then go to Step
11.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION.)
Inspect the purge valve.
(See PURGE SOLENOID VALVE
INSPECTION.)
• If there is any malfunction, replace the purge
valve.
(See INTAKE-AIR SYSTEM HOSE ROUTING
DIAGRAM [LF].)
Then go to Step 11.
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION
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