Sfi System Ecm Power Source Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Gr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT ECM (+B, +B2 VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

INSPECT ECM (MREL VOLTAGE)

INSPECT NO.1 INTEGRATION RELAY (MAIN RELAY)

CHECK HARNESS AND CONNECTOR (NO.1 INTEGRATION RELAY - ECM, BODY GROUND)

INSPECT IGNITION SWITCH ASSEMBLY

SFI SYSTEM - ECM Power Source Circuit


DESCRIPTION

When the ignition switch is turned to ON, battery voltage is applied to the IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contacts of the MAIN relay and supplying power to either terminal +B or +B2 of the ECM.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.INSPECT ECM (+B, +B2 VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G155-1 (+B) - C131-1 (E1)
    		Ignition switch ON
    		11 to 14 V
    G155-2 (+B2) - C131-1 (E1)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Component with harness connected
    (ECM)


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM000000PDG0R6X.html)

2.CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C131-1 (E1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT ECM (IGSW VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G155-9 (IGSW) - C131-1 (E1)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Component with harness connected
    (ECM)


NG
Go to step 7
OK


4.INSPECT ECM (MREL VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System.Sfi System Ecm Power Source Circuit

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G155-8 (MREL) - C131-1 (E1)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Component with harness connected
    (ECM)


NG
REPLACE ECM (HILUX_TGN26 RM000000VW202SX.html)
OK


5.INSPECT NO.1 INTEGRATION RELAY (MAIN RELAY)

  1. Inspect the MAIN relay (HILUX_TGN26 RM000003BLB02FX_01_0019.html).



NG
REPLACE NO.1 INTEGRATION RELAY
OK


6.CHECK HARNESS AND CONNECTOR (NO.1 INTEGRATION RELAY - ECM, BODY GROUND)

  1. Remove the No. 1 integration relay from the engine room relay block and junction block assembly.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    1J-2 - G155-8 (MREL)
    		Always
    		Below 1 Ω
    1J-3 - Body ground
    		Always
    		Below 1 Ω
    1J-2 or G155-8 (MREL) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (TERMINAL +B OF ECM - BATTERY POSITIVE TERMINAL)

7.INSPECT IGNITION SWITCH ASSEMBLY

  1. Inspect the ignition switch assembly (HILUX_TGN26 RM00000135X01OX.html).



NG
REPLACE IGNITION SWITCH ASSEMBLY (HILUX_TGN26 RM00000135Z01OX.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH ASSEMBLY - ECM, BATTERY)