Diagnostic procedure
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STEP
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INSPECTION
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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 the next step.
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2
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VERIFY REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair 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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3
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INDETIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is DTC P1409 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 [YF (2.0L Zetec)].)
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4
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PERFORM KEY ON ENGINE OFF (KOEO) SELF TEST
• Perform KOEO self test.
• Is DTC P1409 displayed?
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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 Step 9.
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5
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CHECK EGR SOLENOID VALVE RESISTANCE
• Disconnect EGR solenoid valve.
• Measure EGR solenoid valve terminals resistance at the component side connector.
• Is the resistance 26-40 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 EGR solenoid valve, then go to Step 11.
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6
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CHECK VPWR VOLTAGE TO EGR SOLENOID VALVE
• Turn the ignition switch to ON.
• Measure voltage between EGR solenoid valve terminal 1 and chassis ground.
• Is 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 11.
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7
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CHECK EGR SOLENOID VALVE CONTROL CIRCUIT FOR OPEN IN HARNESS
• Disconnect PCM.
• Measure resistance of EGR solenoid valve control circuit between PCM terminal 79 and EGR solenoid valve terminal 2 at harness side connectors.
• 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 for open circuit, then go to Step 11.
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8
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CHECK EGR SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER IN HARNESS
• Turn the ignition switch to ON.
• Measure voltage between PCM harness side connector terminal 79 and battery negative post.
• Is voltage less than 1.0 V?
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Yes
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Go to the next step.
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No
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Replace short to power supply, then go to Step 11.
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9
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CHECK EGR SOLENOID VALVE CONTROL CIRCUIT SHORT TO GROUND IN HARNESS
• Measure resistance between terminal 79 and 24, 51, 76, 103 at PCM harness side connector.
• Is resistance greater than 10,000 ohms?
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Yes
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Replace PCM, then go to Step 11.
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No
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Repair short to ground circuit, then go to Step 11.
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10
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WIGGLE EGR SOLENOID VALVE WHILE MOITORING VPWR
• Disconnect PCM.
• Turn the ignition switch to ON.
• Measure voltage between EGR solenoid valve terminal 2 and 24, 51, 76, 103 at PCM harness side connector.
• Voltage must read greater than 10.5 V. For an indication of a fault, look for this voltage to drop while performing the following:
• Is a fault indicated?
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Yes
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Isolate fault and repair or replace malfunctioning part, then go to the next step.
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No
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Intermittent concern exists, go to Intermittent Troubleshooting Procedure.
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11
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VERIFY TROUBLESHOOTING OF DTC P1409 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• 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 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 "After Repair Procedure".
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [YF (2.0L Zetec)].)
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No
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Troubleshooting completed.
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