Dtc P0489 Exhaust Gas Recirculation Control Circuit Low


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT E-VRV FOR EGR

INSPECT E-VRV FOR EGR (POWER SOURCE VOLTAGE)

CHECK HARNESS AND CONNECTOR (E-VRV FOR EGR - ECM)

CHECK HARNESS AND CONNECTOR (E-VRV FOR EGR - INTEGRATION RELAY)

DTC P0489 Exhaust Gas Recirculation Control Circuit Low

DTC P0490 Exhaust Gas Recirculation Control Circuit High


DESCRIPTION

The EGR system recirculates exhaust gases, in order to suit every driving condition. The recirculated gas mingles with intake air, therefore the EGR system can slow combustion speed and keep the combustion temperature down. This helps reduce NOx emission.
In order to increase EGR circulation efficiency, the ECM adjusts the lift amount of the EGR valve and throttle valve angle.

DTC No.
DTC Detection Condition
Trouble Area
P0489
Open or short in E-VRV circuit for 5 seconds or more
(1 trip detection logic)
  1. E-VRV
  2. Open or short in E-VRV circuit
  3. ECM
P0490
Open or short in E-VRV circuit for 5 seconds or more
(1 trip detection logic)
  1. E-VRV
  2. Open or short in E-VRV circuit
  3. ECM

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0489 Exhaust Gas Recirculation Control Circuit Low


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Toyota Fortuner RM0000012XK04BX.html) and initialization (Toyota Fortuner RM000000TIN04NX.html).
1.INSPECT E-VRV FOR EGR

  1. Inspect the E-VRV for EGR (Toyota Fortuner RM000001418004X.html).



NG
REPLACE E-VRV FOR EGR (Toyota Fortuner RM00000141A004X.html)
OK


2.INSPECT E-VRV FOR EGR (POWER SOURCE VOLTAGE)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0489 Exhaust Gas Recirculation Control Circuit Low

  1. Disconnect the V1 E-VRV for EGR connector.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connector and body ground.

    Standard voltage:
    Tester Connection
    		Specified Condition
    V1-1 - Body ground
    		11 to 14 V


NG
Go to step 4
OK


3.CHECK HARNESS AND CONNECTOR (E-VRV FOR EGR - ECM)


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0489 Exhaust Gas Recirculation Control Circuit Low

  1. Disconnect the V1 E-VRV for EGR connector.

  1. Disconnect the E6 ECM connector.

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

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    V1-2 - EGR (E6-9)
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    V1-2 or EGR (E6-9) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE ECM (Toyota Fortuner RM0000013Z0004X.html)

4.CHECK HARNESS AND CONNECTOR (E-VRV FOR EGR - INTEGRATION RELAY)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System. Dtc P0489 Exhaust Gas Recirculation Control Circuit Low

  1. Remove the integration relay from the engine room junction block (Toyota Fortuner RM0000014TJ00JX.html).

  1. Disconnect the 1J integration relay connector.

  1. Disconnect the V1 E-VRV for EGR connector.

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

    Standard resistance (Check for open):
    Tester Connection
    		Specified Condition
    1J-5 - V1-1
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    1J-5 - V1-1
    		Below 1 Ω
    1J-5 or V1-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

INSPECT ECM POWER SOURCE CIRCUIT (Toyota Fortuner RM000000TI2045X.html)