Ecd System Vc Output Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK MIL

CHECK COMMUNICATION BETWEEN GTS AND ECM

CHECK MIL (DIESEL THROTTLE BODY ASSEMBLY)

CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

CHECK MIL (FUEL PRESSURE SENSOR)

CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

CHECK MIL (ELECTRIC EGR CONTROL VALVE ASSEMBLY)

CHECK MIL (DIFFERENTIAL PRESSURE SENSOR)

CHECK MIL (NOZZLE VANE POSITION SENSOR)

CHECK MIL (MASS AIR FLOW METER SUB-ASSEMBLY)

CHECK MIL (CAMSHAFT POSITION SENSOR)

CHECK MIL (CRANKSHAFT POSITION SENSOR)

CHECK HARNESS AND CONNECTOR

ECD SYSTEM - VC Output Circuit


DESCRIPTION

The ECM constantly generates a 5 V power source voltage from the battery voltage supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power source voltage to the sensors through the VC output circuit.

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System.Ecd System Vc Output Circuit

When the VC circuit has a short circuit, the CPU in the ECM and sensors that are supplied power through the VC circuit are deactivated because power is not supplied from the VC circuit. When the system is in this condition, it will not start.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System.Ecd System Vc Output Circuit


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System.Ecd System Vc Output Circuit


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gd-Ftv Engine Control.Ecd System.Ecd System Vc Output Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (LandCruiser RM0000012XK0AVX.html) and initialization (LandCruiser RM000000TIN08IX.html).
1.CHECK MIL

  1. Check that the Malfunction Indicator Lamp (MIL) lights up when the engine switch is turned on (IG).

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B


B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000012WF0AFX.html)
A


2.CHECK COMMUNICATION BETWEEN GTS AND ECM

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG) and turn the GTS on.

  1. Check the communication between the GTS and ECM.

    Result
    Result
    		Proceed to
    Communication is not possible
    		A
    Communication is possible
    		B


B
GO TO MIL CIRCUIT (LandCruiser RM000000WZ11B9X.html)
A


3.CHECK MIL (DIESEL THROTTLE BODY ASSEMBLY)

  1. Disconnect the diesel throttle body assembly connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the diesel throttle body assembly connector.



B
REPLACE DIESEL THROTTLE BODY ASSEMBLY (LandCruiser RM0000013ZD02QX.html)
A


4.CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

  1. Disconnect the accelerator pedal position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the accelerator pedal position sensor connector.



B
REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY (LandCruiser RM00000463000CX.html)
A


5.CHECK MIL (FUEL PRESSURE SENSOR)

  1. Disconnect the fuel pressure sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the fuel pressure sensor connector.



B
REPLACE COMMON RAIL ASSEMBLY (LandCruiser RM000005UI0000X.html)
A


6.CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

  1. Disconnect the manifold absolute pressure sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the manifold absolute pressure sensor connector.



B
REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (LandCruiser RM0000045B300KX.html)
A


7.CHECK MIL (ELECTRIC EGR CONTROL VALVE ASSEMBLY)

  1. Disconnect the electric EGR control valve assembly connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the electric EGR control valve assembly connector.



B
REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY (LandCruiser RM000005UJR000X.html)
A


8.CHECK MIL (DIFFERENTIAL PRESSURE SENSOR)

  1. Disconnect the differential pressure sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the differential pressure sensor connector.



B
REPLACE DIFFERENTIAL PRESSURE SENSOR (LandCruiser RM000005UKB000X.html)
A


9.CHECK MIL (NOZZLE VANE POSITION SENSOR)

  1. Disconnect the nozzle vane position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the nozzle vane position sensor connector.



B
REPLACE TURBOCHARGER NOZZLE VANE CONTROL ACTUATOR (LandCruiser RM000005UI8000X.html)
A


10.CHECK MIL (MASS AIR FLOW METER SUB-ASSEMBLY)

  1. Disconnect the mass air flow meter sub-assembly connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the mass air flow meter sub-assembly connector.



B
REPLACE MASS AIR FLOW METER SUB-ASSEMBLY (LandCruiser RM000000VHD05PX.html)
A


11.CHECK MIL (CAMSHAFT POSITION SENSOR)

  1. Disconnect the camshaft position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the camshaft position sensor connector.



B
REPLACE CAMSHAFT POSITION SENSOR (LandCruiser RM0000013ZJ01SX.html)
A


12.CHECK MIL (CRANKSHAFT POSITION SENSOR)

  1. Disconnect the crankshaft position sensor connector.

  1. Turn the engine switch on (IG).

  1. Check the MIL.

    Result
    Result
    		Proceed to
    MIL does not illuminate
    		A
    MIL illuminates
    		B

  1. Reconnect the crankshaft position sensor connector.



B
REPLACE CRANKSHAFT POSITION SENSOR (LandCruiser RM0000013Z6020X.html)
A


13.CHECK HARNESS AND CONNECTOR

  1. Disconnect the diesel throttle body assembly connector.

  1. Disconnect the accelerator pedal position sensor connector.

  1. Disconnect the fuel pressure sensor connector.

  1. Disconnect the manifold absolute pressure sensor connector.

  1. Disconnect the electric EGR control valve assembly connector.

  1. Disconnect the differential pressure sensor connector.

  1. Disconnect the nozzle vane position sensor connector.

  1. Disconnect the mass air flow meter sub-assembly connector.

  1. Disconnect the camshaft position sensor connector.

  1. Disconnect the crankshaft 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
    C151-29 (VCVL) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    G185-29 (VCPA) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    G185-30 (VCP2) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C151-28 (VCM) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C149-28 (VCPM) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C151-31 (VCEG) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C151-32 (VCPX) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C151-30 (VNVC) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C150-25 (VCVG) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C152-17 (VCG) - Body ground and other terminals
    		Always
    		10 kΩ or higher
    C152-20 (VCNE) - Body ground and other terminals
    		Always
    		10 kΩ or higher

  1. Reconnect the diesel throttle body assembly connector.

  1. Reconnect the accelerator pedal position sensor connector.

  1. Reconnect the fuel pressure sensor connector.

  1. Reconnect the manifold absolute pressure sensor connector.

  1. Reconnect the electric EGR control valve assembly connector.

  1. Reconnect the differential pressure sensor connector.

  1. Reconnect the nozzle vane position sensor connector.

  1. Reconnect the mass air flow meter sub-assembly connector.

  1. Reconnect the camshaft position sensor connector.

  1. Reconnect the crankshaft position sensor connector.

  1. Reconnect the ECM connectors.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM0000013Z002DX.html)