Mazda 6 2002 - Dtc P0032

F76
ON-BOARD DIAGNOSTIC
End Of Sie
DTC P0032
A6E397001084W05
6 INSPECT CONTROL CIRCUIT OF FRONT HO2S
HEATER FOR SHORT TO GROUND
• Inspect continuity between front HO2S terminal
D (harness-side) and body ground.
• Is there continuity?
Yes Repair or replace harness for short to ground, then go to
Step 8.
No Go to next step.
7 INSPECT CONTROL CIRCUIT OF FRONT HO2S
HEATER FOR OPEN CIRCUIT
• Remove PCM with PCM connector connected.
• Inspect continuity between front HO2S terminal
D (harness-side) and PCM terminal 4A.
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit, then go to Step
8.
8 VERIFY TROUBLESHOOTING OF DTC P0031
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
(See F66 KOEO/KOER SELF-TEST.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See F43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
9 VERIFY AFTER REPAIR PROCEDURE
• Perform After Repair Procedure.
(See F66 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F67 DTC TABLE.)
No Troubleshooting completed.
STEP INSPECTION ACTION
DTC P0032 Front HO2S heater circuit high input
DETECTION
CONDITION
• PCM monitors front HO2S heater control signal at PCM terminal 4A. If PCM turns front HO2S heater on but
front HO2S heater circuit has high voltage, PCM determines that front HO2S heater circuit has malfunction.
Note
• Front HO2S heater is controlled by a duty signal.
Diagnostic support note
• This is a continuous monitor (O
2
sensor heater).
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles or in one
drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.
POSSIBLE
CAUSE
• Short to power circuit between front HO2S terminal D and PCM terminal 4A
• Front HO2S or PCM terminal is shorted
• Front HO2S heater malfunction
• PCM malfunction