DTC P049B:00 [SKYACTIV-D 1.5]

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Note

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

Details On DTCs

DESCRIPTION

LP-EGR flow insufficient detected

DETECTION CONDITION

Determination conditions

•  When the following condition is met, the LP-EGR volume is lower than the specification for the target value for a continuous specified time.

Preconditions

•  During LP-EGR control

•  During HP-EGR control

•  Fuel injection amount:15—50 mm³/stoke

•  Engine speed: 1,300—2,500 rpm

•  Engine torque: 70—240 N·m {7.2—24 kgf·m, 52—177 ft·lbf}

•  The following DTCs are not detected:

―  MAP sensor: P0107:00, P0108:00

―  MAF sensor: P0102:00, P0103:00

―  Exhaust gas pressure sensor No.1: P0472:00, P0473:00

―  Exhaust gas temperature sensor No.1: P0546:00

―  Intake shutter valve control: P2101:00, P2118:00, P1589:00

―  Intake shutter valve position sensor: P0122:00, P0123:00

―  HP-EGR control valve DC motor control system: P0404:00, P0488:00

―  HP-EGR control valve position sensor: P0405:00, P0406:00

―  LP-EGR control valve DC motor control system: P045B:00, P213B:00

―  LP-EGR control valve position sensor: P0407:00, P0408:00

―  Exhaust shutter valve DC motor control system: P0475:00, P0476:00

―  Exhaust shutter valve position sensor: P048D:00, P048E:00

―  Internal PCM malfunction: P062B:00

―  Fuel injector: P0201:00, P0202:00, P0203:00, P0204:00, P02EE:00, P02EF:00, P02F0:00, P02F1:00, P1378:00, P1379:00, P2146:00, P2147:00, P2148:00, P2149:00, P2150:00, P2151:00

Drive cycle

•  2

Self test type

•  CMDTC self test

Sensor used

•  LP-EGR control valve

•  HP-EGR control valve

•  Intake shutter valve

•  Exhaust shutter valve

•  MAF sensor

•  MAP sensor

•  Boost air temperature sensor

•  Exhaust gas pressure sensor No.1

•  Exhaust gas temperature sensor No.1

FAIL-SAFE FUNCTION

•  PCM restricts engine torque.

•  Inhibits the EGR control.

•  Inhibits engine-stop by operating the i-stop function.

VEHICLE STATUS WHEN DTCs ARE OUTPUT

•  Check engine light is illuminated

POSSIBLE CAUSE

•  Erratic signal to PCM

―  MAF sensor signal malfunction

―  MAP sensor signal malfunction

―  Boost air temperature sensor signal malfunction

―  Exhaust gas pressure sensor signal malfunction

―  Exhaust gas temperature sensor No.1 signal malfunction

―  Input signal part connector or terminals malfunction

―  Input signal part related circuit malfunction

•  HP-EGR system malfunction

•  Exhaust shutter valve malfunction

•  LP-EGR control valve malfunction (stuck close)

•  Exhaust shutter valve position sensor (built-into exhaust shutter valve) malfunction

•  LP-EGR control valve position sensor (built-into LP-EGR control valve) malfunction

•  EGR cooler clogged

•  EGR filter clogged

•  Catalytic converter or diesel particulate filter malfunction (deformation, damage)

•  Exhaust gas leakage from LP-EGR system

•  LP-EGR system passage malfunction (restriction)

•  Air suction in intake air system between turbocharger with variable turbine geometry and intake manifold

•  PCM malfunction

DESCRIPTION	LP-EGR flow insufficient detected
DETECTION CONDITION	Determination conditions	• When the following condition is met, the LP-EGR volume is lower than the specification for the target value for a continuous specified time.
Preconditions	• During LP-EGR control • During HP-EGR control • Fuel injection amount:15—50 mm³/stoke • Engine speed: 1,300—2,500 rpm • Engine torque: 70—240 N·m {7.2—24 kgf·m, 52—177 ft·lbf} • The following DTCs are not detected: ― MAP sensor: P0107:00, P0108:00 ― MAF sensor: P0102:00, P0103:00 ― Exhaust gas pressure sensor No.1: P0472:00, P0473:00 ― Exhaust gas temperature sensor No.1: P0546:00 ― Intake shutter valve control: P2101:00, P2118:00, P1589:00 ― Intake shutter valve position sensor: P0122:00, P0123:00 ― HP-EGR control valve DC motor control system: P0404:00, P0488:00 ― HP-EGR control valve position sensor: P0405:00, P0406:00 ― LP-EGR control valve DC motor control system: P045B:00, P213B:00 ― LP-EGR control valve position sensor: P0407:00, P0408:00 ― Exhaust shutter valve DC motor control system: P0475:00, P0476:00 ― Exhaust shutter valve position sensor: P048D:00, P048E:00 ― Internal PCM malfunction: P062B:00 ― Fuel injector: P0201:00, P0202:00, P0203:00, P0204:00, P02EE:00, P02EF:00, P02F0:00, P02F1:00, P1378:00, P1379:00, P2146:00, P2147:00, P2148:00, P2149:00, P2150:00, P2151:00
Drive cycle	• 2
Self test type	• CMDTC self test
Sensor used	• LP-EGR control valve • HP-EGR control valve • Intake shutter valve • Exhaust shutter valve • MAF sensor • MAP sensor • Boost air temperature sensor • Exhaust gas pressure sensor No.1 • Exhaust gas temperature sensor No.1
FAIL-SAFE FUNCTION	• PCM restricts engine torque. • Inhibits the EGR control. • Inhibits engine-stop by operating the i-stop function.
VEHICLE STATUS WHEN DTCs ARE OUTPUT	• Check engine light is illuminated
POSSIBLE CAUSE	• Erratic signal to PCM ― MAF sensor signal malfunction ― MAP sensor signal malfunction ― Boost air temperature sensor signal malfunction ― Exhaust gas pressure sensor signal malfunction ― Exhaust gas temperature sensor No.1 signal malfunction ― Input signal part connector or terminals malfunction ― Input signal part related circuit malfunction • HP-EGR system malfunction • Exhaust shutter valve malfunction • LP-EGR control valve malfunction (stuck close) • Exhaust shutter valve position sensor (built-into exhaust shutter valve) malfunction • LP-EGR control valve position sensor (built-into LP-EGR control valve) malfunction • EGR cooler clogged • EGR filter clogged • Catalytic converter or diesel particulate filter malfunction (deformation, damage) • Exhaust gas leakage from LP-EGR system • LP-EGR system passage malfunction (restriction) • Air suction in intake air system between turbocharger with variable turbine geometry and intake manifold • PCM malfunction

System Wiring Diagram

• Not applicable

Function Explanation (DTC Detection Outline)

• The PCM performs diagnosis of the LP-EGR system by comparing the target EGR volume with the actual.

• The PCM monitors the flow volume during LP-EGR implementation.

• The PCM calculates the difference between the target EGR flow volume and the actual EGR flow volume during LP-EGR implementation. If the monitored, actual flow volume is lower than the specification for the target flow volume, the PCM determines that there is inadequate flow volume.

• The PCM performs diagnosis when each of the preconditions during drive cycle is met. If a malfunction is detected, the malfunction detection counter begins counting up. The value of the malfunction detection counter is maintained while the preconditions are not being met. If the cumulative value of the malfunction detection counter exceeds the threshold during the first drive cycle, a malfunction is determined and a pending code is stored.

• If the calculated value of the malfunction detection counter during one drive cycle exceeds the threshold, the PCM determines a malfunction, stores a DTC and turns on the check engine light.

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Repeatability Verification Procedure

Caution

• When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.

• While performing this step, always operate the vehicle in a safe and lawful manner.

1. Start the engine and warm it up completely.

2. Drive the vehicle for 1 min at a speed of 100 km/h {62.2 mph}^*1, 50 km/h {32 mph}^*2 or more.

3. Repeat Step 2 operation above 2 times.

*1 :European (L.H.D.) specs.

*2 :Except european (L.H.D.) specs.

PID Item/Simulation Item Used In Diagnosis

PID/DATA monitor item table

Item	Definition	Unit	Condition/Specification
CACT11	Boost air temperature	°C, °F	• Displays the boost air temperature
EXHPRES1	Exhaust gas pressure (No.1)	kPa, Bar, psi	• Idle: Approx. 106 kPa {1.08 kgf/cm², 15.4 psi} • Racing (engine speed above 2,000 rpm): Approx. 112 kPa {1.14 kgf/cm², 16.2 psi} • Racing (engine speed above 4,000 rpm): Approx. 220 kPa {2.24 kgf/cm², 31.9 psi}
EXHTEMP1	Exhaust gas temperature (No.1)	°C, °F	• Displays the exhaust gas temperature (No.1)
MAF	Mass air flow	g/Sec	• Switch ignition ON (engine off): Approx. 0.38 g/s {0.050 lb/min} • Idle: 2.2—4.5 g/s {0.30—0.59 lb/min} • Racing (engine speed 2,000 rpm): 8.0—9.5 g/s {1.1—1.2 lb/min} • Racing (engine speed 4,000 rpm): 50—56 g/s {6.7—7.4 lb/min}
MAP	Manifold absolute pressure input from MAP sensor	kPa, Bar, psi	• Switch ignition ON (engine off): Approx. 100.37 kPa {1.0235 kgf/cm², 14.557 psi} • Idle: Approx. 82 kPa {0.84 kgf/cm², 12 psi}

Function Inspection Using M-MDS

STEP	INSPECTION		ACTION
1	PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION Note • Recording can be facilitated using the screen capture function of the PC. • Record the FREEZE FRAME DATA/snapshot data on the repair order.	—	Go to the next step.
2	PURPOSE: VERIFY RELATED SERVICE 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.
2		No	Go to the next step.
3	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is the DTC P049B:00 on FREEZE FRAME DATA?	Yes	Go to the next step.
3		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA. (See DTC TABLE [SKYACTIV-D 1.5].)
4	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. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
4		No	Go to the next step.
5	PURPOSE: VERIFY IF THERE IS PID ITEM CAUSING DRASTIC CHANGES OF ACCELERATION FLUCTUATION BY INPUT SIGNAL TO PCM • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) PCM: ― EXHPRES1 ― EXHTEMP1 ― CACT11 ― MAF ― MAP • Is there any signal that is far out of specification?	Yes	Go to the next step.
5		No	Go to the troubleshooting procedure to perform the procedure from Step 1.
6	PURPOSE: VERIFY CONNECTOR CONNECTIONS • Access the following PIDs using the M-MDS: (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) PCM: ― EXHPRES1 ― EXHTEMP1 ― CACT11 ― MAF ― MAP • When the following parts are shaken, does the PID value include a PID item which has changed? ― Exhaust gas pressure sensor No.1 ― Exhaust gas temperature sensor No.1 ― Charge air temperature sensor ― MAF sensor ― MAP sensor ― PCM	Yes	Repair or replace the applicable connector parts. Go to the troubleshooting procedure to perform the procedure from Step 10.
6		No	Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure

• Step 1—3

― Perform inspection of each separate part.

• Step 4—9

― Perform inspection of HP-EGR and LP-EGR passage

• Step 10—11

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

STEP

INSPECTION

ACTION

1

PURPOSE: INSPECT EXHAUST SHUTTER VALVE POSITION SENSOR

•  Inspect the exhaust shutter valve position sensor.
(See EXHAUST SHUTTER VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 1.5].)

•  Is there any malfunction?

Yes

Inspect the exhaust shutter valve, then go to Step 10.

(See EXHAUST SHUTTER VALVE INSPECTION [SKYACTIV-D 1.5].)

No

Go to the next step.

2

PURPOSE: INSPECT LP-EGR CONTROL VALVE CONTROL SYSTEM OPERATION

•  Perform the LP-EGR Control Valve Operation Inspection.
(See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-D 1.5].)

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

3

PURPOSE: INSPECT LP-EGR CONTROL VALVE POSITION SENSOR

•  Inspect the LP-EGR control valve position sensor.
(See LP-EGR CONTROL VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 1.5].)

•  Is there any malfunction?

Yes

Replace the LP-EGR control valve, then go to Step 10.

(See LP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

No

Go to the next step.

4

PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION

•  Inspect for air leakage at the following:

―  Around connection of turbocharger with variable turbine geometry and intake manifold

Note

•  Engine speed may change when rust penetrating agent is sprayed on the air suction area.

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

5

PURPOSE: INSPECT FOR RESTRICTION OR CLOGGED IN HP-EGR PASSAGE

•  Switch the ignition off.

•  Remove the HP-EGR control valve.
(See HP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

•  Visually inspect the HP-EGR passage for clogging and the gasket correctly installed.

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

(If there is clogging caused by soot in the HP-EGR control valve, inspect around the HP-EGR piping and clean or replace it.)

No

Go to the next step.

6

PURPOSE: INSPECT EGR COOLER

•  Inspect the EGR cooler for clogging.
(See EGR COOLER INSPECTION [SKYACTIV-D 1.5].)

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

(See EGR COOLER REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

No

Go to the next step.

7

PURPOSE: INSPECT EGR FILTER

•  Inspect the EGR filter for clogging.

•  Is there any malfunction?

Yes

Clean or replace EGR filter, then go to Step 10.

(See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

No

Go to the next step.

8

PURPOSE: INSPECT LP-EGR SYSTEM FOR LEAKAGE

•  Visually inspect for exhaust gas leakage from the LP-EGR system.
(See EMISSION SYSTEM LOCATION INDEX [SKYACTIV-D 1.5].)

•  Is there any leakage?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.

No

Go to the next step.

9

PURPOSE: INSPECT FOR RESTRICTION IN LP-EGR SYSTEM PASSAGE

•  Switch the ignition off.

•  Remove the LP-EGR control valve.
(See LP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

•  Visually inspect the LP-EGR passage for restriction and the gasket correctly installed.

•  Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to the next step.

(If there is restriction caused by soot in the LP-EGR control valve, inspect around the LP-EGR piping and clean or replace it.)

No

Go to the next step.

10

PURPOSE: PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS PCM

•  Always reconnect all disconnected connectors.

•  Clear the DTC from the PCM memory using the M-MDS.
(See CLEARING DTC [SKYACTIV-D 1.5].)

•  Implement the repeatability verification procedure.
(See Repeatability Verification Procedure.)

•  Perform the Pending Trouble Code Access Procedure.
(See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].)

•  Is the PENDING CODE for this DTC present?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the PCM.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

Go to the next step.

No

Go to the next step.

11

PURPOSE: VERIFY AFTER REPAIR PROCEDURE

•  Perform the “AFTER REPAIR PROCEDURE”.
(See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-D 1.5].)

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	PURPOSE: INSPECT EXHAUST SHUTTER VALVE POSITION SENSOR • Inspect the exhaust shutter valve position sensor. (See EXHAUST SHUTTER VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Inspect the exhaust shutter valve, then go to Step 10. (See EXHAUST SHUTTER VALVE INSPECTION [SKYACTIV-D 1.5].)
1		No	Go to the next step.
2	PURPOSE: INSPECT LP-EGR CONTROL VALVE CONTROL SYSTEM OPERATION • Perform the LP-EGR Control Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
2		No	Go to the next step.
3	PURPOSE: INSPECT LP-EGR CONTROL VALVE POSITION SENSOR • Inspect the LP-EGR control valve position sensor. (See LP-EGR CONTROL VALVE POSITION SENSOR INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Replace the LP-EGR control valve, then go to Step 10. (See LP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
3		No	Go to the next step.
4	PURPOSE: INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION • Inspect for air leakage at the following: ― Around connection of turbocharger with variable turbine geometry and intake manifold Note • Engine speed may change when rust penetrating agent is sprayed on the air suction area. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
4		No	Go to the next step.
5	PURPOSE: INSPECT FOR RESTRICTION OR CLOGGED IN HP-EGR PASSAGE • Switch the ignition off. • Remove the HP-EGR control valve. (See HP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) • Visually inspect the HP-EGR passage for clogging and the gasket correctly installed. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10. (If there is clogging caused by soot in the HP-EGR control valve, inspect around the HP-EGR piping and clean or replace it.)
5		No	Go to the next step.
6	PURPOSE: INSPECT EGR COOLER • Inspect the EGR cooler for clogging. (See EGR COOLER INSPECTION [SKYACTIV-D 1.5].) • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10. (See EGR COOLER REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
6		No	Go to the next step.
7	PURPOSE: INSPECT EGR FILTER • Inspect the EGR filter for clogging. • Is there any malfunction?	Yes	Clean or replace EGR filter, then go to Step 10. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
7		No	Go to the next step.
8	PURPOSE: INSPECT LP-EGR SYSTEM FOR LEAKAGE • Visually inspect for exhaust gas leakage from the LP-EGR system. (See EMISSION SYSTEM LOCATION INDEX [SKYACTIV-D 1.5].) • Is there any leakage?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to Step 10.
8		No	Go to the next step.
9	PURPOSE: INSPECT FOR RESTRICTION IN LP-EGR SYSTEM PASSAGE • Switch the ignition off. • Remove the LP-EGR control valve. (See LP-EGR CONTROL VALVE REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) • Visually inspect the LP-EGR passage for restriction and the gasket correctly installed. • Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results, then go to the next step. (If there is restriction caused by soot in the LP-EGR control valve, inspect around the LP-EGR piping and clean or replace it.)
9		No	Go to the next step.
10	PURPOSE: PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS PCM • Always reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-D 1.5].) • Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) • Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].) Go to the next step.
10		No	Go to the next step.
11	PURPOSE: VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [SKYACTIV-D 1.5].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-D 1.5].)
11		No	DTC troubleshooting completed.