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Home >> Mazda >> 2006 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3) >> DTC P0032 >> Diagnostic Procedure

Diagnostic Procedure

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 (HO2S heater 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 RELATED REPAIR INFORMATION AVAILABILITY 
  • Verify related Service Bulletins and/or on-line 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 INSPECT POOR CONNECTION OF FRONT HO2S CONNECTOR 
  • Turn the ignition switch off.
  • Disconnect front HO2S connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair or replace the terminal, then go to Step 9.
No Go to the next step.
4 INSPECT FRONT HO2S HEATER  Yes Go to the next step.
No Replace the front HO2S, then go to Step 9.
5 INSPECT POWER CIRCUIT OF FRONT HO2S HEATER FOR OPEN CIRCUIT 
  • Turn the ignition switch to the ON position. (Engine off).
  • Measure voltage between front HO2S terminal C and body ground.
  • Is the voltage B+  ?
 Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to Step 9.
6 INSPECT POOR CONNECTION OF PCM CONNECTOR 
  • Turn the ignition switch off.
  • Disconnect the PCM connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Repair terminal, then go to Step 9.
No Go to the next step.
7 INSPECT CONTROL CIRCUIT OF FRONT HO2S HEATER FOR SHORT TO GROUND 
  • Inspect for continuity between front HO2S terminal D and body ground.
  • Is there continuity?
 Yes Repair or replace the wiring harness for short to ground, then go to Step 9.
No Go to the next step.
8 INSPECT CONTROL CIRCUIT OF FRONT HO2S HEATER FOR OPEN CIRCUIT 
  • Remove the PCM with the PCM connector connected.
  • Inspect for continuity between front HO2S terminal D and PCM terminal 2G.
  • Is there continuity?
 Yes Go to the next step.
No Repair or replace the wiring harness for open circuit, then go to the next step.
9 VERIFY TROUBLESHOOTING OF DTC P0032 COMPLETED 
  • Make sure to reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the WDS or equivalent.
  • Perform the KOEO self-test with WDS or equivalent, or HO2S heater, HO2S, and TWC Repair Verification 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.
10 VERIFY AFTER REPAIR PROCEDURE  Yes Go to the applicable DTC troubleshooting.
(See DTC TABLE ).
No Troubleshooting completed.
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