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DTC P049D:00 [PCM (SKYACTIV-X)]

id0102u9203100

Note

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

Details On DTCs

Description

EGR valve system: Fully-closed learning error

Detection condition

Determination conditions

•  The following conditions are met:.

―  The voltage of the EGR valve position sensor fully-closed learning exceeds the specified range.

―  The EGR valve position sensor fully-closed learning is not completed normally.

Preconditions

•  Battery voltage: 8 V or more^*1

^*1: Standard can be verified by displaying PIDs using M-MDS

Drive cycle

•  2

Self test type

•  CMDTC self test, KOEO self test, KOER self test

Sensor used

•  EGR valve position sensor

Fail-safe function

•  Inhibits the EGR control.

Vehicle status when DTCs are output

•  Not applicable

Possible cause

•  EGR valve/EGR valve position sensor connector or terminals malfunction

•  PCM connector or terminals malfunction

•  Open circuit in EGR valve control circuit

•  EGR valve malfunction

•  EGR valve position sensor malfunction

•  PCM malfunction

Description	EGR valve system: Fully-closed learning error
Detection condition	Determination conditions	• The following conditions are met:. ― The voltage of the EGR valve position sensor fully-closed learning exceeds the specified range. ― The EGR valve position sensor fully-closed learning is not completed normally.
Preconditions	• Battery voltage: 8 V or more^1 ^1: Standard can be verified by displaying PIDs using M-MDS
Drive cycle	• 2
Self test type	• CMDTC self test, KOEO self test, KOER self test
Sensor used	• EGR valve position sensor
Fail-safe function	• Inhibits the EGR control.
Vehicle status when DTCs are output	• Not applicable
Possible cause	• EGR valve/EGR valve position sensor connector or terminals malfunction • PCM connector or terminals malfunction • Open circuit in EGR valve control circuit • EGR valve malfunction • EGR valve position sensor malfunction • PCM malfunction

Function Explanation (DTC Detection Outline)

• The PCM learns the standard of the EGR valve position sensor, when fully-closed, when it commands the EGR valve to fully close.

• If the learning value is excessively large or small, or the learning operation is not performed normally, the PCM stores a DTC.

Repeatability Verification Procedure

1. Switch the ignition ON (engine off or on) and wait for 30 s.

2. Switch the ignition OFF and wait for 30 s.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

PIDs	Reference
EGR_ACT	(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)

Simulation item table

Simulation items	Reference
EGR_COMD	(See SIMULATION TABLE [PCM (SKYACTIV-X)].)

Function Inspection Using M-MDS

Step

Inspection

Results

Action

1

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.

2

PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA

•  Is the DTC P049D:00 on freeze frame data?

Yes

Go to the next step.

No

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [PCM (SKYACTIV-X)].)

Go to the next step.

3

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 Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

4

PURPOSE: VERIFY CONFORMITY OF EGR VALVE

•  Start the engine and idle it.

•  Access the following PIDs and simulation item using the M-MDS:
(See PID/DATA MONITOR INSPECTION.)

PIDs

―  EGR_ACT

Simulation item

―  EGR_COMD

•  Perform the following:

―  Change the simulation item EGR_COMD between 0% and 100%.

―  Verify that the PID EGR_ACT monitor value conforms to the simulation item EGR_COMD.

•  Does the monitor value of the PID item EGR_ACT conform to the EGR_COMD monitor value?

Yes

Go to the next step.

No

Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

5

PURPOSE: VERIFY CONNECTOR CONNECTIONS

•  Access the following PIDs using the M-MDS:
(See PID/DATA MONITOR INSPECTION.)

PCM

―  EGR_ACT

•  Does the PID value fluctuate when the following connectors are shaken?

―  EGR valve/EGR valve position sensor

―  PCM

Yes

Inspect the related wiring harness and connector.

•  Repair or replace the malfunctioning part.

Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.

No

Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

Step	Inspection	Results	Action
1	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.
2	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is the DTC P049D:00 on freeze frame data?	Yes	Go to the next step.
No	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-X)].) Go to the next step.
3	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 Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
4	PURPOSE: VERIFY CONFORMITY OF EGR VALVE • Start the engine and idle it. • Access the following PIDs and simulation item using the M-MDS: (See PID/DATA MONITOR INSPECTION.) PIDs ― EGR_ACT Simulation item ― EGR_COMD • Perform the following: ― Change the simulation item EGR_COMD between 0% and 100%. ― Verify that the PID EGR_ACT monitor value conforms to the simulation item EGR_COMD. • Does the monitor value of the PID item EGR_ACT conform to the EGR_COMD monitor value?	Yes	Go to the next step.
No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
5	PURPOSE: VERIFY CONNECTOR CONNECTIONS • Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) PCM ― EGR_ACT • Does the PID value fluctuate when the following connectors are shaken? ― EGR valve/EGR valve position sensor ― PCM	Yes	Inspect the related wiring harness and connector. • Repair or replace the malfunctioning part. 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

Intention of troubleshooting procedure

• Step 1

― Perform an inspection of the wiring harnesses between the EGR valve and the PCM.

• Step 2

― Perform a unit inspection of the EGR valve.

• Repair completion verification

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

Step

Inspection

Results

Action

1

PURPOSE: INSPECT EGR VALVE CONTROL 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.

2

PURPOSE: INSPECT EGR VALVE FOR MALFUNCTION

•  Inspect the applicable part.
(See EGR VALVE 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 EGR VALVE 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.

Step	Inspection	Results	Action
1	PURPOSE: INSPECT EGR VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification.
2	PURPOSE: INSPECT EGR VALVE FOR MALFUNCTION • Inspect the applicable part. (See EGR VALVE INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See EGR VALVE 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].)
Repair completion verification 1		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.
Repair completion verification 2		No	DTC troubleshooting completed.