DTC P0400-00: Exhaust Gas Recirculation "A" Flow; DTC P0401-9C: Exhaust Gas Recirculation "A" Low / Insufficient Flow; DTC P0402-9B: Exhaust Gas Recirculation "A" High/Excessive Flow [07/2020 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTC P0400-00, P0401-9C or P0402-9B is output	A
   DTC P0400-00, P0401-9C or P0402-9B and other DTCs are output	B

   HINT: 

   If any DTCs other than P0400-00, P0401-9C or P0402-9B are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2020 - ] 

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Data List / Intake Manifold Absolute Pressure.

   Powertrain > Engine > Data List 

   Tester Display
   Intake Manifold Absolute Pressure

5. Read the value of Intake Manifold Absolute Pressure.

   Standard

   Techstream Display	Specified Condition
   Intake Manifold Absolute Pressure	80 to 110 kPa (abs) (11.6 to 15.95 psi (abs))

   Result

   Result	Proceed to
   The value of Intake Manifold Absolute Pressure is between 80 and 110 kPa(abs) [11.6 and 15.95 psi(abs)]	OK
   Other than above	NG

Result: 

NG 

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR. Refer to  REMOVAL [11/2015 - ] 

Result: 

OK 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in Inspection Mode (Maintenance Mode).

   Powertrain > Hybrid Control > Utility 

   Tester Display
   Inspection Mode

5. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.

   HINT: 

   The A/C switch and all accessories should be off.

6. Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Engine Speed, Intake Manifold Absolute Pressure, Coolant Temperature and Engine Independent.

   Powertrain > Engine > Active Test 

   Active Test Display
   Control the EGR Step Position

   Data List Display
   Engine Speed
   Intake Manifold Absolute Pressure
   Coolant Temperature
   Engine Independent

7. According to the display on the Techstream, compare the values of Data List item Intake Manifold Absolute Pressure before and while performing the Active Test.
   NOTE:

   • Do not leave the EGR valve open for 10 seconds or more during the Active Test.
   • Be sure to return the EGR valve to step 0 when the Active Test is completed.
   • Do not open the EGR valve 30 steps or more during the Active Test.

   Standard

   The value of Intake Manifold Absolute Pressure changes according to the EGR valve stepset by the Active Test.

   Data List	Control the EGR Step Position (Active Test)
   	Before Active Test (Engine idling)	0 Steps	0 to 30 Steps (Engine idling)
   Intake Manifold Absolute Pressure	20 to 40 kPa (2.9 to 5.8 psi)	(EGR valve is fully closed)	Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

   HINT: 

   • If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Perform the Active Test after charge control is complete ("Operate" is displayed).
   • While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be malfunctioning.
   • Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.

   Result

   Result	Proceed to
   Before performing the Active Test (while the engine is idling), the value of Intake Manifold Absolute Pressure is not between 20 to 40 kPa (2.9 to 5.8 psi).	A
   When performing the Active Test to change the EGR valve step between 0 (EGR valve fully closed) and 30, the value of Intake Manifold Absolute Pressure changes less than 10 kPa (1.42 psi).	B
   Other than above	C

Result: 

B 

See step  6

Result: 

C 

See step  12

Result: 

A 

See step  4

1. Check the intake system for vacuum leaks.

   Refer to ON-VEHICLE INSPECTION [11/2015 - ]

   OK

   No leaks from intake system.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE INTAKE SYSTEM 

HINT: 

Perform "Inspection After Repair" after repairing or replacing the intake system.

Refer to INITIALIZATION [11/2015 - ]

Result: 

OK 

See step  5

1. Remove the EGR valve assembly.

   HINT: 

   Refer to REMOVAL [07/2020 - ]

2. Check if the EGR valve is stuck open.

   OK

   EGR valve is tightly closed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR. Refer to  REMOVAL [11/2015 - ] 

Result: 

NG 

REPLACE EGR VALVE ASSEMBLY 

Refer to REMOVAL [07/2020 - ]

HINT: 

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Refer to INITIALIZATION [11/2015 - ]

1. Replace the EGR valve assembly.

   HINT: 

   • Refer to REMOVAL [07/2020 - ]
   • Perform "Inspection After Repair" after replacing the EGR valve assembly.

     Refer to INITIALIZATION [11/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the power switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  8

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

3. Input the DTC: P0400-00, P0401-9C or P0402-9B.
4. Check the DTC judgment result.

   Result

   Result	Proceed to
   NORMAL (DTCs are not output)	A
   ABNORMAL (DTC P0400-00, P0401-9C or P0402-9B is output)	B

Result: 

A 

END 

Result: 

B 

See step  9

1. Replace the EGR pipe with cooler sub-assembly.

   HINT: 

   • Refer to REMOVAL [07/2020 - ]
   • If any of the EGR system related pipes (EGR pipe, exhaust manifold, etc.) are cracked, damaged or clogged, replace them as necessary.
   • Perform "Inspection After Repair" after replacing the EGR system.

     Refer to INITIALIZATION [11/2015 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  10

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the power switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

3. Input the DTC: P0400-00, P0401-9C or P0402-9B.
4. Check the DTC judgment result.

   Result

   Techstream Display	Description
   NORMAL	DTC judgment completed System normal
   ABNORMAL	DTC judgment completed System abnormal
   INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

5. Turn the power switch off and wait for at least 30 seconds.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  13

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

   Powertrain > Engine > Utility 

   Tester Display
   All Readiness

3. Input the DTC: P0400-00, P0401-9C or P0402-9B.
4. Check the DTC judgment result.

   Result

   Result	Proceed to
   NORMAL (DTCs are not output)	A
   ABNORMAL (DTC P0400-00, P0401-9C or P0402-9B is output)	B

Result: 

A 

END 

Result: 

B 

REPLACE EGR VALVE ASSEMBLY 

Refer to REMOVAL [07/2020 - ]

HINT: 

Perform "Inspection After Repair" after replacing the EGR valve assembly.

Refer to INITIALIZATION [11/2015 - ]