DTC P0443[AJ (3.0L Duratec)]
id0102a4807600
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DTC P0443 |
Purge solenoid valve control circuit malfunction |
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DETECTION CONDITION
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• The PCM monitors that the purge solenoid valve control circuit signal at PCM terminal 56. If the PCM detects that the signal moves outside minimum or maximum allowance calibrated parameters for specified purge duty cycle by PCM commanded, the PCM determines that the purge solenoid valve control circuit malfunction.
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POSSIBLE CAUSE
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• Open circuit in wiring between purge solenoid valve terminal A and main relay terminal B
• Short to ground in purge solenoid valve terminal B and PCM terminal 56
• Damaged purge solenoid valve
• Open circuit in wiring between purge solenoid valve terminal B and PCM terminal 56
• Short to power supply circuit in wiring between purge solenoid valve terminal B and PCM terminal 56
• Damaged PCM
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME 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 on the repair order, then go to next step.
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2
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VERIFY 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 next step.
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No
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Go to the next step.
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3
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INDETIFY TRIGGER DTC FOR FEEZE FRAME DATA
• Is DTC P0443 on FREEZE FRAME DATA?
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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 FREEZE FRAME DATA DTC inspection.
(See DTC TABLE[AJ (3.0L Duratec)].)
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4
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INSPECT PURGE SOLENOID VALVE CIRCUIT FOR INTERMITTENT FAILURE
• Rerun KOEO, KOER self test and Continuous Memory DTCs.
• Is DTC P0443 present in Continuous Memory self test only?
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Yes
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Intermittent concern exists, go to Intermittent Troubleshooting Procedure.
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No
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Go to the next step.
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5
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CHECK POWER SUPPLY VOLTAGE TO PURGE SOLENOID VALVE CIRCUIT
• Turn the ignition switch to off.
• Disconnect purge solenoid valve.
• Turn the ignition switch to the ON position.
• Measure voltage between purge solenoid valve terminal A at harness side connector and battery negative post.
• Is the voltage greater than 10.5 V?
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Yes
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Go to the next step.
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No
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Repair open circuit, then go to Step 10.
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6
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CHECK PURGE SOLENOID VALVE RESISTANCE
• Disconnect purge solenoid valve.
• Measure purge solenoid valve resistance.
• Is resistance 30—38 ohms?
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Yes
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Go to the next step.
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No
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Replace purge solenoid valve, then go to Step 10.
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7
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CHECK PURGE SOLENOID VALVE CONTROL CIRCUIT FOR OPEN IN HARNESS
• Disconnect PCM.
• Measure the resistance between PCM terminal 56 and purge solenoid valve terminal B at harness side connector.
• Is resistance less than 5.0 ohms?
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Yes
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Go to the next step.
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No
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Repair open circuit, then go to Step 10.
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8
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CHECK PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO GROUND IN WIRING
• Measure resistance between purge solenoid valve terminal B at harness side connector and battery negative post.
• Is resistance greater than 10,000 ohms?
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Yes
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Go to the next step.
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No
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Repair short to ground, then go to Step 10.
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9
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CHECK PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER IN HARNESS
• Turn the ignition switch to the ON position.
• Measure voltage between purge solenoid valve terminal B at harness side connector and battery negative post.
• Is the voltage greater than 10.5 V?
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Yes
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Repair short to power circuit, then go to the next step.
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No
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Replace PCM, then go to the next step.
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10
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VERIFY TROUBLESHOOTING OF DTC P0443 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Perform KOEO/KOER self test.
• Is the PENDING CODE same DTC present?
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Yes
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Replace PCM, then go to next step.
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No
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Go to the next step.
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11
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VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
• Is there any DTC present?
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Yes
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Go to applicable DTC inspection.
(See DTC TABLE[AJ (3.0L Duratec)].)
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No
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Troubleshooting completed.
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