DTC P0403-18: Exhaust Gas Recirculation "A" Circuit Current Below Threshold; DTC P0403-19: Exhaust Gas Recirculation "A" Circuit Current Above Threshold; DTC P1400-18: Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold; DTC P1400-19: Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Above Threshold [08/2020 - 08/2021]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

   HINT: 

   The A/C switch and all accessory switches should be off.

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

   Powertrain > Engine > Active Test 

   Active Test Display
   Control the EGR Step Position

   Data List Display
   Engine Speed
   Intake Manifold Absolute Pressure
   Coolant Temperature

6. Check the engine idling condition and Intake Manifold Absolute Pressure values in the Data List 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.

   OK

   The value of Intake Manifold Absolute Pressure and Engine Speed change in response to EGR step position.

   Standard

   -	Control the EGR Step Position (Active Test)
   	0 Steps	0 to 30 Steps
   Idling condition	Steady idling	Idling changes from steady to rough idling or engine stalls
   Intake Manifold Absolute Pressure (Data List)	Intake Manifold Absolute Pressure value is 20 to 40 kPa(abs) (2.9 to 5.8 psi(abs)) (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: 

   During Active Test, if the idling condition does not change in response to EGR step position, then there is probably a malfunction in the EGR valve.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [08/2020 - ] 

Result: 

NG 

See step  2

1. Inspect the EGR valve assembly.

   Refer to INSPECTION [08/2020 - ]

   HINT: 

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

   Refer to INITIALIZATION [08/2020 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE EGR VALVE ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021] 

Result: 

OK 

See step  3

1. Disconnect the EGR valve assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C71-1 (EGA+) - C77-3 (EGA+)	Always	Below 1 Ω
   C71-2 (EGA-) - C77-4 (EGA-)	Always	Below 1 Ω
   C71-4 (EGB+) - C77-6 (EGB+)	Always	Below 1 Ω
   C71-3 (EGB-) - C77-5 (EGB-)	Always	Below 1 Ω
   C71-1 (EGA+) or C77-3 (EGA+) - Body ground and other terminals	Always	10 kΩ or higher
   C71-2 (EGA-) or C77-4 (EGA-) - Body ground and other terminals	Always	10 kΩ or higher
   C71-4 (EGB+) or C77-6 (EGB+) - Body ground and other terminals	Always	10 kΩ or higher
   C71-3 (EGB-) or C77-5 (EGB-) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [08/2020 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR