DTC P220B:00 [DOSING CONTROL UNIT (SKYACTIV-D 2.2)]

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Details On DTCs

DESCRIPTION	NOx sensor No.2: power supply voltage malfunction
DETECTION CONDITION	Determination conditions	•  The NOx sensor No.2 internal supply voltage is not within the specified value for a continuous 30 s.
	Preconditions	•  Battery voltage: 10.9—16 V •  CAN communication is normal at engine start for a continuous 20 s or more •  The following DTCs is not detected: ―  NOx sensor No.1: U029E:00
	Drive cycle	•  1
	Self test type	•  CMDTC self test
	Sensor used	•  NOx sensor No.2 •  Dosing control unit
FAIL-SAFE FUNCTION	•  Not applicable
VEHICLE STATUS WHEN DTCs ARE OUTPUT	•  DTC P1640:00 is also stored in the PCM. •  P0615:00 may be stored if the remaining distance to empty is 0 km {0 mile} and the engine cannot be restarted.
POSSIBLE CAUSE	•  NOx sensor No.2 connector or terminals malfunction •  SCR relay No.2 malfunction •  SCR4 15 A fuse malfunction •  Short to ground in wiring harness between SCR4 15 A fuse and NOx sensor No.2 terminal E •  Open circuit in wiring harness between the following terminals: ―  SCR relay No.2 terminal C—NOx sensor No.2 terminal E ―  SCR relay No.1 terminal C—SCR relay No.2 terminal A ―  SCR relay No.2 terminal E—body ground •  Dosing control unit connector or terminals malfunction •  NOx sensor No.2 malfunction ―  Internal malfunction •  Battery malfunction •  Dosing control unit malfunction

System Wiring Diagram

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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 30 s.

PID Item/Simulation Item Used In Diagnosis

Function Inspection Using M-MDS

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY •  Verify related Service Information availability. •  Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA •  Is the DTC P220B:00 on FREEZE FRAME DATA?	Yes	Go to the next step.
		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
3	PURPOSE: RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION •  Recording can be facilitated using the screen capture function of the PC. •  Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (NOx sensor No.2 related) on the repair order.	—	Go to Troubleshooting Diagnostic Procedure to perform the procedure from step 1.

Troubleshooting Diagnostic Procedure

―  Perform inspection of NOx sensor No.2 power supply related parts.

―  Perform inspection of the battery.

―  Verify that the primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: INSPECT NOx SENSOR NO.2 CONNECTOR CONDITION •  Switch the ignition off. •  Disconnect the NOx sensor No.2 connector. •  Inspect for poor connection (such as damaged/pulled-out pins, corrosion). •  Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 3.
		No	Go to the next step.
2	PURPOSE: INSPECT SCR RELAY NO.2 •  Switch the ignition off. •  Remove the SCR relay No.2. (See RELAY LOCATION.) •  Inspect the SCR relay No.2. (See RELAY INSPECTION.) •  Is there any malfunction?	Yes	Replace the SCR relay No.2, then go to Step 7. (See RELAY LOCATION.)
		No	Go to the next step.
3	PURPOSE: INSPECT SCR4 15 A FUSE •  Remove the SCR4 15 A fuse. (See RELAY LOCATION.) •  Inspect the SCR4 15 A fuse. (See RELAY INSPECTION.) •  Is there any malfunction?	Yes	Go to the next step.
		No	If the fuse is blown: •  Refer to the wiring diagram and verify whether or not there is a common connector between SCR4 15 A fuse and NOx sensor No.2 terminal E. If there is a common connector: ―  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. ―  Repair or replace the malfunctioning part. If there is no common connector: ―  Repair or replace the wiring harness which has a short to ground. ―  Replace the fuse. If the fuse is damaged: •  Replace the fuse. Go to Step 7.
4	PURPOSE: INSPECT NOx SENSOR NO.2 CIRCUIT FOR OPEN CIRCUIT •  Verify that the urea level sensor/urea temperature sensor/urea tank heater and dosing control unit connectors are disconnected. •  Switch the ignition off. •  Inspect for continuity between the following terminals (wiring harness-side): ―  SCR relay No.2 terminal C—NOx sensor No.2 terminal E ―  SCR relay No.1 terminal C—SCR relay No.2 terminal A ―  SCR relay No.2 terminal E—body ground •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: •  SCR relay No.2 terminal C—NOx sensor No.2 terminal E •  SCR relay No.1 terminal C—SCR relay No.2 terminal A •  SCR relay No.2 terminal E—body ground If there is a common connector: •  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. •  Repair or replace the malfunctioning part. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 7.
5	PURPOSE: INSPECT DOSING CONTROL UNIT CONNECTOR CONDITION •  Switch the ignition off. •  Disconnect the dosing control unit connector. •  Inspect for poor connection (such as damaged/pulled-out pins, corrosion). •  Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 7.
		No	Go to the next step.
6	INSPECT BATTERY •  Inspect the battery. (See BATTERY INSPECTION.) •  Is there any malfunction?	Yes	Recharge or replace the battery, then go to the next step. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
		No	Replace the NOx sensor No.2, then go to the next step. (See NOx SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
7	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Clear the DTC from the dosing control unit memory using the M-MDS. (See CLEARING DTC [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) •  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].) •  Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the dosing control unit. (See DOSING CONTROL UNIT REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Go to the next step.
		No	Go to the next step.
8	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION •  Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [DOSING CONTROL UNIT (SKYACTIV-D 2.2)].)
		No	DTC troubleshooting completed.