Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

CHECK WHETHER DTC OUTPUT RECURS (P0405 OR P0406)

REPLACE ECM

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0405 Exhaust Gas Recirculation Sensor "A" Circuit Low

DTC P0406 Exhaust Gas Recirculation Sensor "A" Circuit High


DESCRIPTION

The EGR valve position sensor is mounted on the EGR valve and used for detecting the EGR valve angle. The EGR valve angle detected by the sensor is sent to the ECM as feedback. The ECM then regulates the EGR valve angle in accordance with engine running conditions.

P0405
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 5 seconds
EGR valve position sensor output voltage is less than 0.2 V for 2 seconds.
(1 trip detection logic)
  1. Open or short in EGR valve position sensor circuit
  2. Electric EGR control valve assembly (EGR valve position sensor)
  3. ECM

P0406
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch ON for 5 seconds
EGR valve position sensor output voltage is higher than 4.8 V for 2 seconds.
(1 trip detection logic)
  1. Open or short in EGR valve position sensor circuit
  2. Electric EGR control valve assembly (EGR valve position sensor)
  3. ECM

MONITOR DESCRIPTION

When the output voltage of the EGR valve position sensor deviates from the normal operating range of 0.1 to 4.9 V for more than 5 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.

WIRING DIAGRAM

Refer to DTC P042E (HILUX_TGN26 RM000004KMK00DX_03.html).

INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  2. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK058X.html) and initialization (HILUX_TGN26 RM000000TIN056X.html).
  3. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN056X.html).
  4. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK058X.html).
HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM)

  1. Disconnect the electric EGR control valve assembly connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C120-3 (VC) - C114-13 (VC)
    		Always
    		Below 1 Ω
    C120-2 (VTA) - C113-1 (EGRA)
    		Always
    		Below 1 Ω
    C120-1 (E2) - C114-14 (E2)
    		Always
    		Below 1 Ω
    C120-3 (VC) or C114-13 (VC) - Body ground
    		Always
    		10 kΩ or higher
    C120-2 (VTA) or C113-1 (EGRA) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the electric EGR control valve assembly connector.

  1. Reconnect the ECM connector.



NG
Go to step 6
OK


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

  1. Disconnect the electric EGR control valve assembly connector.

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C120-3 (VC) - C120-1 (E2)
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Electric EGR Valve Assembly)

  1. Reconnect the electric EGR control valve assembly connector.



NG
Go to step 5
OK


3.REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Replace the electric EGR control valve assembly (HILUX_TGN26 RM000004QWK009X.html).


NEXT


4.CHECK WHETHER DTC OUTPUT RECURS (P0405 OR P0406)

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch to ON for 5 seconds or more.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the DTC is not output again.

    OK:
    DTC is not output again.


NG
Go to step 5
OK

END

5.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 7

6.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


7.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch to ON for 5 seconds or more.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the DTC is not output again.


NEXT

END