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
• Exhaust gas amount is within specified value or exhaust gas temperature sensor No.4 is 19.96 °C {247.93 °F} or more
• 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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