Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TERMINAL VOLTAGE (EGR VALVE POSITION SENSOR CONNECTOR)

INSPECT EGR VALVE POSITION SENSOR

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

REPLACE ECM

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

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 is used for detecting the lift amount of the valve. The lift amount detected by the sensor is provided to the ECM as feedback. The ECM then regulates the lift amount of the valve in accordance with engine running conditions.

P0405
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 5 seconds
EGR valve position sensor output voltage is below 0.1 V for more than 5 seconds (1 trip detection logic).
  1. Open or short in EGR valve position sensor circuit
  2. EGR valve position sensor
  3. ECM

P0406
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
Ignition switch to ON for 5 seconds
EGR valve position sensor output voltage is more than 4.9 V for higher than 5 seconds (1 trip detection logic).
  1. Open or short in EGR valve position sensor circuit
  2. 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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK043X.html) and initialization (HILUX_TGN26 RM000000TIN04FX.html).
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 TERMINAL VOLTAGE (EGR VALVE POSITION SENSOR CONNECTOR)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

  1. Disconnect the EGR valve position sensor connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C56-1 (VC) - C56-2 (E2)
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to EGR Valve Position Sensor)

  1. Reconnect the electric vacuum regulating valve assembly connector.



NG
Go to step 3
OK


2.INSPECT EGR VALVE POSITION SENSOR

  1. Inspect the EGR valve position sensor (HILUX_TGN26 RM000002RK7013X.html).



NG
Go to step 5
OK


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

  1. Disconnect the EGR valve position sensor connector.

  1. Disconnect the ECM connectors.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C56-1 (VC) - C22-18 (VC)
    		Always
    		Below 1 Ω
    C56-3 (EGLS) - C23-33 (EGLS)
    		Always
    		Below 1 Ω
    C56-2 (E2) - C22-28 (E2)
    		Always
    		Below 1 Ω
    C56-1 (VC) or C22-18 (VC) - Body ground
    		Always
    		10 kΩ or higher
    C56-3 (EGLS) or C23-33 (EGLS) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the electric vacuum regulating valve assembly connector.

  1. Reconnect the ECM connector.



NG
Go to step 6
OK


4.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000043H100GX.html).



NEXT
Go to step 7

5.REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Replace the electric EGR control valve assembly (HILUX_TGN26 RM000002RK901GX.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 RM000000PDK0TAX.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