Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

Двигатель. Toyota Rav4. Aca30, 33, 38 Ala30
Система Управления Двигателем 2Ad-Fhv. Toyota Rav4. Aca30, 33, 38 Ala30

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK EGR VALVE POSITION SENSOR POWER SOURCE

INSPECT EGR VALVE POSITION SENSOR

CHECK WIRE HARNESS (EGR VALVE POSITION SENSOR - ECM)

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 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.

DTC No.
DTC Detection Condition
Trouble Area
P0405
EGR valve position sensor output voltage is less than 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
EGR valve position sensor output voltage is more than 4.9 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

УКАЗАНИЕ:
  1. After confirming DTCs P0405 and P0406, check the EGR valve opening angle condition by entering the following menus on the intelligent tester: Powertrain / Engine and ECT / Data List / EGR Position.
  2. The result values below are for when the ignition switch is on (IG) (engine is stopped), or when the engine is fully warmed-up and idling.

Result
Condition
Changes between 0.3 V and 4.2 V
Normal
Less than 0.1 V
P0405 (Low input voltage)
More than 4.9 V
P0406 (High input voltage)

MONITOR DESCRIPTION

When output voltage of the EGR valve position sensor deviates from the normal operating range of 0.1 to 4.9 V for more than 0.5 seconds, the ECM interprets this as a malfunction of the sensor circuit, and illuminates the MIL.
Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

WIRING DIAGRAM

Refer to DTC P0400 (see page RAV4_ACA30 RM000001886004X_03.html).

INSPECTION PROCEDURE

ПРИМЕЧАНИЕ:
After replacing the ECM, the new ECM needs registration (see page RAV4_ACA30 RM000000TJ4007X.html) and initialization (see page RAV4_ACA30 RM000000TIN007X.html).
1.CHECK EGR VALVE POSITION SENSOR POWER SOURCE


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

  1. Disconnect the B54 EGR valve position sensor connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Specified Condition
    B54-3 (VC) - B54-2 (E2)
    		4.5 to 5.5 V

  1. Reconnect the EGR valve position sensor connector.



NG
Перейдите к шагу 3
OK


2.INSPECT EGR VALVE POSITION SENSOR
Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

  1. Disconnect the B54 EGR valve position sensor connector.

  1. Measure the resistance of the EGR valve position sensor.

    Standard resistance:

    Tester Connection
    		EGR Valve Condition
    		Condition
    		Specified Condition
    B54-3 (VC)- B54-2 (E2)
    		-
    		20°C (68°F)
    		3.5 to 6.5 kΩ
    B54-4 (EGLS) - B54-2 (E2)
    		Fully open
    		20°C (68°F)
    		3.9 kΩ
    B54-4 (EGLS) - B54-2 (E2)
    		Fully closed
    		20°C (68°F)
    		1.0 kΩ

  1. Reconnect the EGR valve position sensor connector.



NG
REPLACE EGR VALVE POSITION SENSOR
OK


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


    Toyota Rav4. Aca30, 33, 38 Ala30.Система Управления Двигателем 2Ad-Fhv.Система Ecd. Dtc P0405 Exhaust Gas Recirculation Sensor A Circuit Low

  1. Disconnect the B54 sensor connector.

  1. Disconnect the B32 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    B54-3 (VC) - B32-72 (VCEG)
    		Below 1 Ω
    B54-4 (EGLS) - B32-118 (EGLS)
    		Below 1 Ω
    B54-2 (E2) - B32-95 (EEGL)
    		Below 1 Ω
    B54-3 (VC) or B32-72 (VCEG) - Body ground
    		10 kΩ or higher
    B54-4 (EGLS) or B32-118 (EGLS) - Body ground
    		10 kΩ or higher

  1. Reconnect the EGR valve position sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM