1Kd-Ftv Engine Control. Ecd System (For I-Art) Vc Output Circuit

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

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf).Ecd System (For I-Art) Vc Output Circuit

When the VC circuit is short-circuited, the microprocessor in the ECM and sensors that are supplied with power through the VC circuit are inactivated because the power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.

HINT:

Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned to ON. The MIL goes off when the engine is started.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK05AX.html) and initialization (HILUX_TGN26 RM000000TIN058X.html).

1.CHECK MIL

Check that the Malfunction Indicator Lamp (MIL) lights up when turning the ignition switch to ON.

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

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

END

B

2.CHECK COMMUNICATION BETWEEN GTS AND ECM

Connect the GTS to the DLC3.

Turn the ignition switch to ON and GTS on.

Check the communication between the GTS and ECM.

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

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

GO TO MIL CIRCUIT (HILUX_TGN26 RM000000WZ10U6X.html)

B

3.CHECK MIL (ACCELERATOR PEDAL POSITION SENSOR)

Disconnect the G6 accelerator pedal position sensor connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the accelerator pedal position sensor connector.

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY (HILUX_TGN26 RM0000013ZF013X.html)

B

4.CHECK MIL (THROTTLE POSITION SENSOR)

Disconnect the C9 throttle position sensor connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the throttle position sensor connector.

REPLACE DIESEL THROTTLE BODY ASSEMBLY (HILUX_TGN26 RM0000013ZD01QX.html)

B

5.CHECK MIL (ELECTRIC EGR CONTROL VALVE ASSEMBLY)

Disconnect the C120 electric EGR control valve assembly connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the electric EGR control valve assembly connector.

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY (HILUX_TGN26 RM000004QWK009X.html)

B

6.CHECK MIL (MANIFOLD ABSOLUTE PRESSURE SENSOR)

Disconnect the C20 manifold absolute pressure sensor connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the manifold absolute pressure sensor connector.

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR (HILUX_TGN26 RM000004Q2F00CX.html)

B

7.CHECK MIL (NO. 1 INJECTOR ASSEMBLY)

Disconnect the C159 No. 1 injector assembly connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the No. 1 injector assembly connector.

REPLACE NO. 1 INJECTOR ASSEMBLY (HILUX_TGN26 RM0000044TN00FX.html)

B

8.CHECK MIL (NO. 2 INJECTOR ASSEMBLY)

Disconnect the C160 No. 2 injector assembly connector.

Turn the ignition switch to ON.

Check the MIL.

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

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

Reconnect the No. 2 injector assembly connector.

REPLACE NO. 2 INJECTOR ASSEMBLY (HILUX_TGN26 RM0000044TN00FX.html)

B

9.CHECK MIL (NO. 3 INJECTOR ASSEMBLY)

Disconnect the C161 No. 3 injector assembly connector.

Turn the ignition switch to ON.

Check the MIL.

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

Reconnect the No. 3 injector assembly connector.

REPLACE NO. 3 INJECTOR ASSEMBLY (HILUX_TGN26 RM0000044TN00FX.html)

B

10.CHECK MIL (NO. 4 INJECTOR ASSEMBLY)

Disconnect the C162 No. 4 injector assembly connector.

Turn the ignition switch to ON.

Check the MIL.

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

Reconnect the No. 4 injector assembly connector.

REPLACE NO. 4 INJECTOR ASSEMBLY (HILUX_TGN26 RM0000044TN00FX.html)

B

11.CHECK MIL (NOZZLE VANE POSITION SENSOR)

Disconnect the C40 nozzle vane position sensor connector.

Turn the ignition switch to ON.

Check the MIL.

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

Reconnect the nozzle vane position sensor connector.

REPLACE TURBOCHARGER SUB-ASSEMBLY (HILUX_TGN26 RM00000143U013X.html)

B

12.CHECK HARNESS AND CONNECTOR

Disconnect the G6 accelerator pedal position sensor connector.

Disconnect the C9 throttle position sensor connector.

Disconnect the C120 electric EGR control valve assembly connector.

Disconnect the C40 nozzle vane position sensor connector.

Disconnect the C20 manifold absolute pressure sensor connector.

Disconnect the C159 No. 1 injector assembly connector.

Disconnect the C160 No. 2 injector assembly connector.

Disconnect the C161 No. 3 injector assembly connector.

Disconnect the C162 No. 4 injector assembly connector.

Disconnect the C166 ECM connectors.

Disconnect the C167 ECM connectors.

Disconnect the G156 ECM connectors.

Disconnect the G157 ECM connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G156-6 (VCPA) - Body ground	Always	10 kΩ or higher
G156-4 (VCP2) - Body ground	Always	10 kΩ or higher
C166-14 (VCVL) - Body ground	Always	10 kΩ or higher
C166-13 (VCEG) - Body ground	Always	10 kΩ or higher
C167-18 (VCPM) - Body ground	Always	10 kΩ or higher
C167-17 (VNVC) - Body ground	Always	10 kΩ or higher
C166-18 (VIJ1) - Body ground	Always	10 kΩ or higher
C166-17 (VIJ2) - Body ground	Always	10 kΩ or higher
C166-16 (VIJ3) - Body ground	Always	10 kΩ or higher
C166-15 (VIJ4) - Body ground	Always	10 kΩ or higher

Reconnect the accelerator pedal position sensor connector.

Reconnect the throttle position sensor connector.

Reconnect the electric EGR control valve assembly connector.

Reconnect the nozzle vane position sensor connector.

Reconnect the manifold absolute pressure sensor connector.

Reconnect the No. 1 injector assembly connector.

Reconnect the No. 2 injector assembly connector.

Reconnect the No. 3 injector assembly connector.

Reconnect the No. 4 injector assembly connector.

Reconnect the ECM connectors.

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE ECM (HILUX_TGN26 RM0000013Z001IX.html)