DTC P0030:00 [MZR-CD 2.2]
id0102f3700300
DTC P0030:00 |
A/F sensor heater control circuit malfunction |
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DETECTION CONDITION
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• OBD system monitors the output signal current from A/F sensor which is in proportion to the element impedance of A/F sensor. If the output signal current is below 0.573 A or above 6.072 A after specified time from engine start, heater performance is considered failed.
Monitoring condition
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA (mode2) and snapshot data are available.
• The DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• A/F sensor connector or terminal malfunction
• A/F sensor heater malfunction
• Open circuit in the wiring harness between A/F sensor heater terminal C and main relay
• Short to ground in the wiring harness between A/F sensor heater terminal C and main relay
• Short to ground in the wiring harness between A/F sensor heater terminal D and PCM terminal 2BD
• PCM connector or terminal malfunction
• Short to power supply in the wiring harness between A/F sensor heater terminal D and PCM terminal 2BD
• Open circuit in wiring harness between A/F sensor heater terminal D and PCM terminal 2BD
• PCM malfunction
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Diagnostic procedure
STEP |
INSPECTION |
ACTION |
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1
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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2)
• Is DTC P0030:00 on FREEZE FRAME DATA (mode2)?
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Yes
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Go to the next step.
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No
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Go to troubleshooting for DTC on FREEZE FRAME DATA (mode2).
(See DTC TABLE [MZR-CD 2.2].)
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2
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VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED
• Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA (mode2) and snapshot data on the repair order, then go to the next step.
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3
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VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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4
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INSPECT A/F SENSOR CONNECTOR FOR POOR CONNECTION
• Switch the ignition to off.
• Disconnect the A/F sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 11.
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No
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Go to the next step.
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5
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INSPECT A/F SENSOR HEATER
• Inspect the A/F sensor heater.
• Is there any malfunction?
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Yes
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Replace the A/F sensor, then go to Step 11.
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No
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Go to the next step.
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6
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INSPECT A/F SENSOR HEATER POWER CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
• Disconnect the A/F sensor connector.
• Switch the ignition to ON (Engine off).
• Measure the voltage between A/F sensor terminal C (wiring harness-side) and body ground.
• Is the voltage B+?
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Yes
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Go to the next step.
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No
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Inspect the A/F sensor heater related fuse condition.
If the fuse is melt-down, repair for short to ground circuit.
If the fuse is deterioration, replace the fuse.
If the fuse is normal, repair for open circuit.
Then go to Step 11.
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7
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INSPECT A/F SENSOR HEATER CONTROL CIRCUIT FOR SHORT TO GROUND
• Switch the ignition to off.
• Inspect for continuity between A/F sensor terminal D (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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If the short to ground circuit could be detected:
• Repair or replace the wiring harness for a possible short to ground.
If the short to ground circuit could not be detected:
• Replace the PCM (short to ground in the PCM internal circuit).
Go to Step 11.
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No
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Go to the next step.
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8
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Switch the ignition to off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction detected?
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Yes
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Repair or replace the terminal, then go to Step 11.
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No
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Go to the next step.
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9
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INSPECT A/F SENSOR CONTROL CIRCUIT FOR SHORT TO POWER
• Disconnect the A/F sensor connector and PCM connector.
• Switch the ignition to ON.
• Inspect the voltage between A/F sensor heater terminal D (wiring harness side) and body ground.
• Is the voltage B+?
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Yes
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Repair or replace the wiring harness for a possible a short to power, then go to Step 11.
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No
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Go to the next step.
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10
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INSPECT A/F SENSOR HEATER CONTROL CIRCUIT FOR OPEN CIRCUIT
• Switch the ignition to off.
• Inspect for continuity between A/F sensor terminal D (wiring harness-side) and PCM terminal 2BD (wiring harness-side)
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace the wiring harness for a possible open circuit, then go to the next step.
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11
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VERIFY TROUBLESHOOTING OF DTC P0030:00 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Switch the ignition to ON.
• Perform the DTC Reading Procedure.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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12
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VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZR-CD 2.2].)
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No
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DTC troubleshooting completed.
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