| P0698 | EGR valve position sensor circuit or fuel pressure sensor circuit low input |
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DETECTION CONDITION
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• The PCM monitors the input signal from EGR valve position sensor or fuel pressure sensor. If the voltage from EGR valve position sensor or fuel pressure sensor is less than 0.25 V, the PCM determines that there is a malfunction in the EGR valve position sensor circuit or fuel pressure sensor circuit.
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POSSIBLE CAUSE
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• EGR valve position sensor malfunction
• Fuel pressure sensor malfunction
• Connector or terminal malfunction
• Short to ground in wiring harness between EGR valve position sensor terminal E and PCM terminal 201
• Short to ground in wiring harness between fuel pressure sensor terminal A and PCM terminal 202
• PCM malfunction
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Diagnostic procedure
| 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 the next step.
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2
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VERIFY RELATED 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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INSPECT EGR VALVE POSITION SENSOR CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the EGR valve position sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 10.
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No
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Go to the next step.
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4
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INSPECT FUEL PRESSURE SENSOR CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the fuel pressure sensor connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 10.
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No
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Go to the next step.
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5
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INSPECT EGR VALVE POSITION SENSOR POWER CIRCUIT FOR SHORT TO GROUND
• Turn the engine switch off.
• Disconnect the EGR valve position sensor connector.
• Inspect for continuity between EGR valve position sensor terminal E (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
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No
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Go to the next step.
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6
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INSPECT FUEL PRESSURE SENSOR POWER CIRCUIT FOR SHORT TO GROUND
• Turn the engine switch off.
• Disconnect the fuel pressure sensor connector.
• Inspect for continuity between fuel pressure sensor terminal A (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
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No
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Go to the next step.
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7
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INSPECT EGR VALVE POSITION SENSOR
• Inspect the EGR valve position sensor.
• Is there any malfunction?
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Yes
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Replace the EGR valve, then go to Step 10.
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No
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Go to the next step.
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8
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INSPECT FUEL PRESSURE SENSOR
• Inspect the fuel pressure sensor.
• Is there any malfunction?
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Yes
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Replace the common rail, then go to Step 10.
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No
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Go to the next step.
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9
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to the next step.
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No
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Go to the next step.
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10
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VERIFY TROUBLESHOOTING OF DTC P0698 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine.
• Is the same DTC present?
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Yes
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Replace the 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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11
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VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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