Mazda 3 Workshop Manual page 199

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Verify related service repair information
availability.
• Is any related repair information
available?
VERIFY RELATED PENDING CODE OR
STORED DTC
• Turn the ignition switch off, then ON
position (Engine off).
3
• Verify the related PENDING CODE or
stored DTCs.
• Is the DTC P2177 or P2187 also
present?
IDENTIFY TRIGGER DTC FOR FREEZE
FRAME DATA
4
• Is DTC P2096 on FREEZE FRAME
DATA?
VERIFY CURRENT INPUT SIGNAL
STATUS OF REAR HO2S
• Connect the WDS or equivalent to the
DLC-2.
• Start the engine and warm it up
completely.
• Access the O2S12 PID.
• Read the O2S12 PID under following
5
accelerator pedal condition (in PARK or
NEUTRAL).
- More than 0.45 V when
suddenly depressing accelerator
pedal (rich condition)
- Less than 0.45 V just after
releasing accelerator pedal (lean
condition)
• Is the PID normal?
VERIFY CURRENT INPUT SIGNAL
STATUS
• Connect the WDS or equivalent to the
DLC-2.
6
• Verify the following PIDs.
(See PCM INSPECTION
- ECT
- MAF
Downloaded from
No Go to the next step.
Yes
No Go to the next step.
Yes Go to the next step.
No
Yes Go to the next step.
No
Yes Go to the next step.
No
[Z6].)
https://carmanualshub.com/
• If the vehicle is not repaired, go to the next
step.
Go to the applicable DTC troubleshooting.
(See DTC TABLE [Z6].)
Go to the FREEZE FRAME DATA DTC
inspection.
(See DTC TABLE [Z6].)
Visually inspect for gas leakage between the
TWC and rear HO2S.
• If there is no leakage, replace the rear HO2S.
(See REAR HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION
Then go to Step 17.
Inspect the malfunctioning part according to the
inspection results.
Then go to Step 17.
- automotive repair manuals website
[Z6].)