Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1VD-FTV ENGINE CONTROL

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK ECM TERMINAL VOLTAGE (VC TERMINAL)

REPLACE EGR VALVE ASSEMBLY

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

DTC P0407 Exhaust Gas Recirculation Sensor "B" Circuit Low

DTC P0408 Exhaust Gas Recirculation Sensor "B" Circuit High

DESCRIPTION

The EGR valve position sensor is mounted on the EGR valve and 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 (No. 1), P0407 (No. 2)
DTC Detection Drive PatternDTC Detection ConditionTrouble Area
Engine switch on (IG) for 5 secondsEGR valve position sensor output voltage is less than 0.1 V for 5 seconds.
(1 trip detection logic)
Open in EGR valve position sensor circuit
EGR valve assembly (EGR valve position sensor)
ECM
P0406 (No. 1), P0408 (No. 2)
DTC Detection Drive PatternDTC Detection ConditionTrouble Area
Engine switch on (IG) for 5 secondsEGR valve position sensor output voltage is more than 4.9 V for 5 seconds.
(1 trip detection logic)
Short in EGR valve position sensor circuit
EGR valve assembly (EGR valve position sensor)
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

Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

  • NOTICE:
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
After replacing the ECM, the new ECM needs registration () and initialization ().
After replacing the fuel supply pump assembly, the ECM needs initialization ().
After replacing an injector assembly, the ECM needs registration ().
  • HINT:
  • Read freeze frame data using the GTS. 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)

Disconnect the No. 1 or No. 2 EGR valve assembly connector.

Disconnect the ECM connector.

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

  • Standard Resistance:
  • No. 1 (LHD)
    Tester ConnectionConditionSpecified Condition
    C87-3 (VC) - C45-91 (VC)AlwaysBelow 1 Ω
    C87-4 (EGLS) - C45-88 (EGLS)AlwaysBelow 1 Ω
    C87-2 (E2) - C45-92 (E2)AlwaysBelow 1 Ω
    C87-3 (VC) or C45-91 (VC) - Body groundAlways10 kΩ or higher
    C87-4 (EGLS) or C45-88 (EGLS) - Body groundAlways10 kΩ or higher
  • No. 2 (LHD)
    Tester ConnectionConditionSpecified Condition
    C88-3 (VC) - C45-91 (VC)AlwaysBelow 1 Ω
    C88-4 (EGS2) - C45-89 (EGS2)AlwaysBelow 1 Ω
    C88-2 (E2) - C45-92 (E2)AlwaysBelow 1 Ω
    C88-3 (VC) or C45-91 (VC) - Body groundAlways10 kΩ or higher
    C88-4 (EGS2) or C45-89 (EGS2) - Body groundAlways10 kΩ or higher
  • No. 1 (RHD)
    Tester ConnectionConditionSpecified Condition
    C87-3 (VC) - C46-91 (VC)AlwaysBelow 1 Ω
    C87-4 (EGLS) - C46-88 (EGLS)AlwaysBelow 1 Ω
    C87-2 (E2) - C46-92 (E2)AlwaysBelow 1 Ω
    C87-3 (VC) or C46-91 (VC) - Body groundAlways10 kΩ or higher
    C87-4 (EGLS) or C46-88 (EGLS) - Body groundAlways10 kΩ or higher
  • No. 2 (RHD)
    Tester ConnectionConditionSpecified Condition
    C88-3 (VC) - C46-91 (VC)AlwaysBelow 1 Ω
    C88-4 (EGS2) - C46-89 (EGS2)AlwaysBelow 1 Ω
    C88-2 (E2) - C46-92 (E2)AlwaysBelow 1 Ω
    C88-3 (VC) or C46-91 (VC) - Body groundAlways10 kΩ or higher
    C88-4 (EGS2) or C46-89 (EGS2) - Body groundAlways10 kΩ or higher
NG
Go to step 5
OK
2.CHECK ECM TERMINAL VOLTAGE (VC TERMINAL)
Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low. 1VD-FTV ENGINE CONTROL. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the No. 1 or No. 2 EGR valve assembly connector.

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

  • Standard Voltage:
  • No. 1
    Tester ConnectionSwitch ConditionSpecified Condition
    C87-3 (VC) - C87-2 (E2)Engine switch on (IG)4.5 to 5.5 V
  • No. 2
    Tester ConnectionSwitch ConditionSpecified Condition
    C88-3 (VC) - C88-2 (E2)Engine switch on (IG)4.5 to 5.5 V
Text in Illustration
*ANo. 1
*BNo. 2
*aFront view of wire harness connector
(to EGR valve assembly)
NG
Go to step 4
OK
3.REPLACE EGR VALVE ASSEMBLY

When DTC P0405 or P0406 is output:


Replace the No. 1 EGR valve assembly ().

When DTC P0407 or P0408 is output:


Replace the No. 2 EGR valve assembly ().
NEXT
Go to step 6
4.REPLACE ECM

Replace the ECM ().

NEXT
Go to step 6
5.REPAIR OR REPLACE HARNESS OR CONNECTOR

Repair or replace the harness or connector.

NEXT
6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the GTS to the DLC3.

Clear the DTCs ().

Turn the engine switch off.

Turn the engine switch on (IG) for 5 seconds.

Enter the following menus: Engine and ECT / Trouble Codes.

Confirm that the DTC is not output again.

NEXT
END