Ecd System Egr Control Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

When using intelligent tester:

CHECK CONNECTION OF VACUUM HOSE

CHECK VACUUM

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VACUUM SWITCHING VALVE FOR EGR CUT)

INSPECT VACUUM SWITCHING VALVE FOR EGR CUT

CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - ECM)

CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - INTEGRATION RELAY (MAIN RELAY))

CHECK ECM (EGR VOLTAGE)

CHECK OPERATION OF ELECTRIC VACUUM REGULATING VALVE FOR EGR

INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (RESISTANCE)

CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - ECM)

CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - INTEGRATION RELAY (MAIN RELAY))

INSPECT EGR VALVE ASSEMBLY

When not using intelligent tester:

CHECK CONNECTION OF VACUUM HOSE

CHECK VACUUM

INSPECT VACUUM SWITCHING VALVE FOR EGR CUT

INSPECT VACUUM SWITCHING VALVE FOR EGR CUT (OPERATION)

CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - ECM)

CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - INTEGRATION RELAY (MAIN RELAY))

CHECK ECM (EGR VOLTAGE)

INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (RESISTANCE)

INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (OPERATION)

CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - ECM)

CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - INTEGRATION RELAY (MAIN RELAY))

INSPECT EGR VALVE ASSEMBLY

ECD SYSTEM - EGR Control Circuit


DESCRIPTION

The EGR system recirculates exhaust gases, and is controlled to the proper volume to be suitable for all driving conditions. The recirculated gas mingles with the intake air, allowing the EGR system to slow down engine combustion and lower the combustion temperature. This helps reduce NOx emissions. In order to increase circulatory efficiency, the ECM adjusts the lift amount of the EGR valve and throttle valve. The VSV is turned ON by a signal from the ECM. This results in atmospheric air closing the EGR valve, which shuts off the exhaust gas (EGR cut-off).

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit


INSPECTION PROCEDURE

NOTICE:
If the ECM is replaced, the new ECM needs initialization (Toyota Fortuner RM0000012X2005X.html).

When using intelligent tester:

1.CHECK CONNECTION OF VACUUM HOSE

  1. Check the connection of vacuum hose.

    OK:
    Vacuum hose is connected securely.


NG
REPAIR OR REPLACE VACUUM HOSE
OK


2.CHECK VACUUM
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Using a 3-way connector, connect a vacuum gauge to the vacuum hose between the E-VRV for EGR and EGR valve.

  1. Warm up the engine to above 80°C (176°F).

  1. Check the vacuum at 1,500 rpm.

    Result:
    Vacuum
    		Proceed to
    0 kPa (0 mmHg, 0 in.Hg)
    		A
    0 kPa (0 mmHg, 0 in.Hg) to 28 kPa (210 mmHg, 8.3 in.Hg)
    		B
    Above 28 kPa (210 mmHg, 8.3 in.Hg)
    		C


A
Go to step 7

C
Go to step 12
B


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VACUUM SWITCHING VALVE FOR EGR CUT)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the vacuum hose from the VSV.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester II ON.

  1. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EGR Cut.

  1. Check the operation.

    Result:
    When VSV is ON, air from port E flows out through air filter.
    When VSV is OFF, air does not flow from port E to air filter.


OK
Go to step 12
NG


4.INSPECT VACUUM SWITCHING VALVE FOR EGR CUT
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V2 VSV connector.

  1. Measure the resistance of the VSV.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		37 to 44 Ω


NG
REPLACE VACUUM SWITCHING VALVE FOR EGR CUT
OK


5.CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V2 VSV connector.

  1. Disconnect the E7 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E6-18 (EGRC) - V2-2
    		Below 1 Ω
    E6-18 (EGRC) or V2-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - INTEGRATION RELAY (MAIN RELAY))
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Remove the integration relay from the engine room junction block (Toyota Fortuner RM0000014TJ00JX_01_0001.html).

  1. Disconnect the 1J integration relay connector.

  1. Disconnect the V2 VSV connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    1J-5 - V2-1
    		Below 1 Ω
    1J-5 or V2-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


7.CHECK ECM (EGR VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V1 E-VRV connector.

  1. During idling, check the waveform of the ECM connector.

    OK:
    Tester Connection
    		Specified Condition
    E6-9 (EGR) - E6-7 (E1)
    		Correct waveform is as shown
    Tool Setting
    		Condition
    5 V/DIV., 1 msec./DIV.
    		Idling with warm engine
    HINT:
    The waveform varies depending on the E-VRV operation.


NG
REPLACE ECM
OK


8.CHECK OPERATION OF ELECTRIC VACUUM REGULATING VALVE FOR EGR
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the vacuum hoses from the E-VRV.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch ON and turn the intelligent tester ON.

  1. Enter the following menus: Powertrain / Engine / Active Test / Control the EGR System.

  1. Check the operation.

    OK:
    When E-VRV is ON, air from port E flows out through port F.
    E-VRV is OFF, air does not flow from port E to port F.


OK
Go to step 12
NG


9.INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (RESISTANCE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V1 E-VRV connector.

  1. Measure the resistance of the E-VRV.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		11 to 13 Ω


NG
REPLACE ELECTRIC VACUUM REGULATING VALVE FOR EGR
OK


10.CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V1 E-VRV connector.

  1. Disconnect the E7 ECM connector.

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

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


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


11.CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - INTEGRATION RELAY (MAIN RELAY))
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Remove the integration relay from the engine room junction block (Toyota Fortuner RM0000014TJ00JX_01_0001.html).

  1. Disconnect the 1J integration relay connector.

  1. Disconnect the V1 E-VRV connector.

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

    Standard resistance:
    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


12.INSPECT EGR VALVE ASSEMBLY


NG
REPLACE EGR VALVE ASSEMBLY
OK

REPLACE ECM


When not using intelligent tester:

1.CHECK CONNECTION OF VACUUM HOSE

  1. Check the connection of vacuum hose.

    OK:
    Vacuum hose is connected securely.


NG
REPAIR OR REPLACE VACUUM HOSE
OK


2.CHECK VACUUM
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Using a 3-way connector, connect a vacuum gauge to the vacuum hose between the E-VRV for EGR and EGR valve.

  1. Warm up the engine to above 80°C (176°F).

  1. Check the vacuum at 1,500 rpm.

    Result:
    Vacuum
    		Proceed to
    0 kPa (0 mmHg, 0 in.Hg)
    		A
    0 kPa (0 mmHg, 0 in.Hg) to 28 kPa (210 mmHg, 8.3 in.Hg)
    		B
    Above 28 kPa (210 mmHg, 8.3 in.Hg)
    		C


A
Go to step 7

C
Go to step 12
B


3.INSPECT VACUUM SWITCHING VALVE FOR EGR CUT
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V2 VSV connector.

  1. Measure the resistance of the VSV.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		37 to 44 Ω


NG
REPLACE VACUUM SWITCHING VALVE FOR EGR CUT
OK


4.INSPECT VACUUM SWITCHING VALVE FOR EGR CUT (OPERATION)


NG
REPLACE VACUUM SWITCHING VALVE FOR EGR CUT
OK


5.CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V2 VSV connector.

  1. Disconnect the E7 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E7-18 (EGRC) - V2-2
    		Below 1 Ω
    E7-18 (EGRC) or V2-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


6.CHECK WIRE HARNESS (VACUUM SWITCHING VALVE FOR EGR CUT - INTEGRATION RELAY (MAIN RELAY))
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  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 V2 VSV connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    1J-5 - V2-1
    		Below 1 Ω
    1J-5 or V2-1 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


7.CHECK ECM (EGR VOLTAGE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

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

  1. During idling, check the waveform of the ECM connector.

    Standard:
    Tester Connection
    		Specified Condition
    E7-9 (EGR) - E7-7 (E1)
    		Correct waveform is as shown
    Tool Setting
    		Condition
    5 V/DIV., 1 msec./DIV.
    		Idling with warm engine
    HINT:
    The waveform varies depending on the E-VRV operation for EGR.


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


8.INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (RESISTANCE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V1 E-VRV connector.

  1. Measure the resistance of the E-VRV.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C (68°F)
    		11 to 13 Ω


NG
REPLACE ELECTRIC VACUUM REGULATING VALVE FOR EGR
OK


9.INSPECT ELECTRIC VACUUM REGULATING VALVE FOR EGR (OPERATION)


NG
REPLACE ELECTRIC VACUUM REGULATING VALVE FOR EGR
OK


10.CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  1. Disconnect the V1 E-VRV connector.

  1. Disconnect the E7 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E7-9 (EGR) - V1-2
    		Below 1 Ω
    E7-9 (EGR) or V1-2 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


11.CHECK WIRE HARNESS (ELECTRIC VACUUM REGULATING VALVE FOR EGR - INTEGRATION RELAY (MAIN RELAY))
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Kd-Ftv Engine Control System.Ecd System.Ecd System Egr Control Circuit

  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 connector.

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

    Standard resistance:
    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


12.INSPECT EGR VALVE ASSEMBLY


NG
REPLACE EGR VALVE ASSEMBLY
OK

REPLACE ECM