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DTC P220A:00 [PCM (SKYACTIV-X)]

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Note

•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs

Description	NOx sensor: power supply voltage malfunction
Detection condition	Determination conditions	•  The NOx sensor power supply voltage is not within the specified value for a continuous 5 s.
	Preconditions	•  The following conditions are met: ―  Battery voltage: 11—16 V ―  Engine is running ―  NOx sensor is activating
	Drive cycle	•  2
	Self test type	•  CMDTC self test
	Sensor used	•  NOx sensor
Fail-safe function	•  Inhibits the SPCCI control with a large amount of intake air introduced (lean A/F).
Vehicle status when DTCs are output	•  Not applicable
Possible cause	•  Battery malfunction •  PCM connector or terminals malfunction •  Short to ground or open circuit in SCU relay power supply circuit •  SCU relay malfunction •  NOx sensor connector or terminals malfunction •  Short to ground in NOx sensor power supply circuit •  Short to power supply in NOx sensor power supply circuit •  Open circuit in NOx sensor power supply circuit •  NOx sensor malfunction •  PCM malfunction

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

1.  Display the PID NOX_SEN_ACTIVITY using the M-MDS. (See PID/DATA MONITOR INSPECTION.)

2.  Drive the vehicle until the PID NOX_SEN_ACTIVITY value turns on.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Function Inspection Using M-MDS

Step	Inspection	Results	Action
1	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION •  Record the freeze frame data/snapshot data. Note •  Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY •  Verify related Service Bulletins, on-line repair information, or Service Information availability. •  Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. •  If the vehicle is not repaired, go to the next step.
		No	Go to the next step.
3	PURPOSE: INSPECT FOR OTHER RELATED DTCs •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-X)].) Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

―  Perform a unit inspection of the battery.

―  Perform a unit inspection of the PCM connector.

―  Perform an inspection of the wiring harnesses between the battery positive terminal and SCU relay.

―  Perform a unit inspection of the SCU relay.

―  Perform an inspection of the connectors and wiring harnesses between the SCU relay and NOx sensor.

―  Perform a unit inspection of the NOx sensor.

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

Step	Inspection	Results	Action
1	PURPOSE: INSPECT BATTERY FOR MALFUNCTION •  Inspect the applicable part. (See BATTERY INSPECTION [(E)].) •  Is the part normal?	Yes	Go to the next step.
		No	Recharge or replace the battery and perform the repair completion verification. (See BATTERY RECHARGING [(E)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
2	PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	INSPECT SCU RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT •  Inspect the power supply circuit for an open circuit and short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	PURPOSE: INSPECT SCU RELAY FOR MALFUNCTION •  Inspect the applicable part. (See RELAY INSPECTION.) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location then perform the repair completion verification. (See RELAY LOCATION [(E)].)
5	PURPOSE: INSPECT NOx SENSOR CONNECTOR FOR MALFUNCTION •  Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) •  Are the connector and terminal normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT NOx SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND •  Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT NOx SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO POWER SUPPLY •  Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT NOx SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT •  Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) •  Is the circuit normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	PURPOSE: INSPECT NOx SENSOR FOR MALFUNCTION •  Inspect the applicable part. (See NOx SENSOR INSPECTION [SKYACTIV-X 2.0].) •  Is the part normal?	Yes	Go to the next step.
		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See NOx SENSOR REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED •  Install/connect the part removed/disconnected during the troubleshooting procedure. •  Clear the DTC recorded in the memory. (See CLEARING DTC.) •  Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ―  Implement the repeatability verification procedure. (See Repeatability Verification Procedure) •  Perform the DTC inspection for the PCM. (See DTC INSPECTION.) •  Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. •  If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs DISPLAYED •  Perform the DTC inspection. (See DTC INSPECTION.) •  Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
		No	DTC troubleshooting completed.