LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2005 >> 3 SP23, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System] >> DTC P2097 >> Diagnostic procedure

Diagnostic procedure

DTC P2097 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED 
  • Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (Fuel system related) been recorded?
 Yes Go to the next step.
No Record the FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2 VERIFY REPAIR INFORMATION AVAILABILITY 
  • Verify related service repair information availability.
  • Is any related repair information available?
 Yes Perform repair or diagnosis according to the available repair information.
If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY RELATED PENDING CODE OR STORED DTC 
  • Turn the ignition switch off, then to the ON position (Engine off).
  • Verify the related PENDING CODE or stored DTCs.
  • Is the DTC P2178 or P2188 also present?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE )
No Go to the next step.
4 IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA 
  • Is DTC P2097 on FREEZE FRAME DATA?
 Yes Go to the next step.
No Go to FREEZE FRAME DATA DTC inspection.
(See DTC TABLE )
5 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 O2S12 PID.
  • Read O2S12 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?
 Yes Go to the next step.
No Visually inspect for the exhaust gas leakage between TWC and middle(1)/rear(2) HO2S.

Then go to Step 11.
6 VERIFY CURRENT INPUT SIGNAL STATUS 
  • Connect the WDS or equivalent to the DLC-2.
  • Verify the following PIDs:

    (See PCM INSPECTION .)

    • ECT
    • MAF
    • TP
    • VSS
  • Are the PIDs normal?
 Yes Go to the next step.
No Inspect the malfunctioning part according to the inspection results.
Then go to Step 11.
7 VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA CONDITION 
  • Connect the WDS or equivalent to the DLC-2.
  • Verify the following PIDs under FREEZE FRAME DATA condition.

    (See PCM INSPECTION .)

    • ECT
    • MAF
    • TP
    • VSS
  • Are the PIDs normal?
 Yes Go to the next step.
No Inspect the malfunctioning part according to the inspection results.
Then go to Step 11.
8 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).

    Except for California emission regulation applicable model: 

    • 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).

    California emission regulation applicable model: 

    • Less than 1 mA  when accelerator pedal is suddenly depressed (rich condition).
    • More than 1 mA  just after release of accelerator pedal (lean condition).
  • Is the PID normal?
 Yes Go to the next step.
No Visually inspect for exhaust gas leakage between the exhaust manifold and front HO2S.

Then go to Step 11.
9 INSPECT FUEL LINE PRESSURE  Yes Replace the fuel pump unit, then go to Step 11.
(See FUEL PUMP UNIT REMOVAL/INSTALLATION .)
No Go to the next step.
10 INSPECT LONG TERM FUEL TRIM 
  • Connect the WDS or equivalent to the DLC-2.
  • Access LONGFT1 PID.
  • Compare the LONGFT1 PID with recorded FREEZE FRAME DATA at Step 1.
  • Is the LONGFT1 PID above FREEZE FRAME DATA?
 Yes Inspect the purge valve.
(See PURGE SOLENOID VALVE INSPECTION .)

Then go to Step 11.
No Go to the next step.
11 VERIFY TROUBLESHOOTING OF DTC P2097 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Perform the PCM Adaptive Memory Produce Drive Mode.

    (See OBD-II DRIVE MODE )

  • Is the PENDING CODE for this DTC present?
 Yes Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No Go to the next step.
12 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC inspection.
(See DTC TABLE )
No Troubleshooting completed.
(1) California emission regulation applicable model
(2) Except for California emission regulation applicable model
scientia non olet · About LEMON Manuals