DTC P229F:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]
id0102k1727300
Details On DTCs
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DESCRIPTION |
NOx sensor No.2 system: NOx concentration malfunction |
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DETECTION CONDITION
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Determination conditions
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• With the following conditions met, the value of the NOx sensor No.2 on-board diagnostic result is not within the specified value 2 times.
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Preconditions
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• Exhaust gas temperature sensor No.5: 849.96 °C {1561.9 °F} or less for 30 s or more
• Engine speed: 0—1,500 rpm for 4 s or more
• Diesel particulate filter regeneration control is performed for 10 min or more
• Vehicle speed: 1 km/h {0.6 mph}
• Diesel particulate filter regeneration control is not operating
• DeNOx control is not operating (After DeNOx control is completed, diagnostics are stopped for 30 s period at maximum)
• DeSOx control is not operating
• Condition in which exhaust gas flow amount is within specified value and diesel exhaust fluid (DEF) dosing amount is specified value or more for specified time or more does not occur.
• NOx sensor No.2 heater temperature is normal
• NOx sensor No.2 supply voltage is normal
• Battery voltage: 10.9—16 V
• The following DTCs is not detected:
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Drive cycle
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• 2
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Self test type
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• CMDTC self test
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Sensor used
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• NOx sensor No.2
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FAIL-SAFE FUNCTION
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• Not applicable
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VEHICLE STATUS WHEN DTCs ARE OUTPUT
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• Illuminates selective catalytic reduction (SCR) warning light.
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POSSIBLE CAUSE
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• NOx sensor No.2 connector or terminals malfunction
• Dosing control unit connector or terminals malfunction
• NOx sensor No.2 loose
• Exhaust gas leakage from exhaust system
• NOx sensor No.2 malfunction
• Dosing control unit malfunction
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System Wiring Diagram
Function Explanation (DTC Detection Outline)
Repeatability Verification Procedure
1. Perform the "COMPULSORY DIESEL PARTICULATE FILTER REGENERATION". (See COMPULSORY DIESEL PARTICULATE FILTER REGENERATION [SKYACTIV-D 2.2].)
2. Idle the engine for 3 min.
3. Switch the ignition off and leave it idling for 5 min.
4. Start the engine.
PID Item/Simulation Item Used In Diagnosis
PID/DATA monitor item table
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Item |
Definition |
Unit |
Condition/Specification |
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NOX_C_B1S2
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NOx sensor No.2
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— (ppm)
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• Displays the exhaust gas NOx concentration after SCR converter
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Function Inspection Using M-MDS
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STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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PURPOSE: VERIFY RELATED REPAIR 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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2
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PURPOSE: RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (NOx sensor No.2) on the repair order.
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—
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Go to the next step.
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3
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PURPOSE: VERIFY IF DIAGNOSTIC RESULT IS AFFECTED BY OTHER RELATED DTCs OCCURRING
• Switch the ignition off, then ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Is the PENDING CODE/DTC P220B:00 or U029E:00 also present?
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Yes
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Go to the applicable DTC inspection.
Repair or replace the applicable wiring harness or connector parts.
Go to the troubleshooting procedure to perform the procedure from Step 4.
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No
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Go to the next step.
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4
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PURPOSE: VERIFY IF THERE IS PID ITEM CAUSING DRASTIC CHANGES OF ACCELERATION FLUCTUATION BY INPUT SIGNAL TO PCM OR DOSING CONTROL UNIT
• Access the following PIDs using the M-MDS:
• Is there any signal that is far out of specification?
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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 Diagnostic Procedure to perform the procedure from Step 1.
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5
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PURPOSE: VERIFY CONNECTOR CONNECTIONS
• Access the following PIDs using the M-MDS:
• When the following parts are shaken, does the PID value include a PID item which has changed?
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Yes
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Inspect the related wiring harness and connector.
• Repair or replace the malfunctioning part.
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No
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Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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Troubleshooting Diagnostic Procedure
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STEP |
INSPECTION |
RESULTS |
ACTION |
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1
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PURPOSE: INSPECT INSTALLATION OF NOx SENSOR No.2
• Inspect installation of NOx sensor No.2.
• Is the NOx sensor No.2 installed securely?
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Yes
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Go to the next step.
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No
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Retighten the NOx sensor No.2, then go to Step 3.
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2
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PURPOSE: VERIFY IF MALFUNCTION RELATED TO EMISSION SYSTEM AFFECTS NOx SENSOR No.2 SIGNAL
• Inspect for exhaust gas leakage from the exhaust system.
• Is there any malfunction?
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Yes
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Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
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No
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Replace the NOx sensor No.2, then go to the next step.
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3
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PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION
• Clear the DTC from the dosing control unit memory using the M-MDS.
• Implement the repeatability verification procedure.
• Perform the Pending Trouble Code Access Procedure.
• Is the same Pending DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the dosing control unit.
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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PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION
• Is any other DTC or pending code stored?
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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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