Ho2S (Front) - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Diagnostic procedure
STEP
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
1
• Has FREEZE FRAME DATA been
recorded?
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
• Verify related service repair information
2
availability.
• Is any related repair information available?
VERIFY RELATED PENDING AND
STORED DTC
• Turn the ignition switch off, then to the ON
position (Engine off).
3
• Verify pending and /or stored DTCs using
the WDS or equivalent.
• Is DTC P0443 also present?
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
4
• Is DTC P0133 on FREEZE FRAME DATA?
VERIFY CURRENT INPUT SIGNAL
STATUS
• Warm up the engine.
• Access O2S11 PID using WDS or
equivalent.
• Inspect PID under following accelerator
5 pedal conditions in NEUTRAL.
• Is PID normal?
- 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).
INSPECT INSTALLATION OF FRONT
HO2S
6
• Inspect if the front HO2S is loosely
installed.
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INSPECTION
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ACTION
Yes Go to the next step.
Record the FREEZE FRAME DATA on repair
No
order, then go to the next step.
Perform repair or diagnosis according to the
available repair information.
Yes
• If vehicle is not repaired, go to the next step.
No Go to the next step.
Go to DTC P0443 troubleshooting
Yes
procedures, then go to Step 13.
No Go to the next step.
Yes Go to the next step.
Go to troubleshooting procedures for DTC on
FREEZE FRAME DATA.
No
(See DTC TABLE [LF].)
Yes Go to step 8.
No Go to the next step.
Yes Go to the next step.
No Retighten the sensor, then go to Step 13.
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