Sfi System (W/O Secondary Air Injection System) Ecm Power Source Circuit

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK NO. 1 INTEGRATION RELAY (POWER SOURCE)

INSPECT NO. 1 INTEGRATION RELAY (MAIN)

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

CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND)

INSPECT ECM (IGSW VOLTAGE)

CHECK HARNESS AND CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)

INSPECT IGNITION SWITCH ASSEMBLY

SFI SYSTEM (w/o Secondary Air Injection System) - ECM Power Source Circuit


DESCRIPTION

When the ignition switch is turned to ON, the battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil of the No. 1 integration relay (MAIN relay), closing the contacts and supplying power to terminals +B of the ECM.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).Sfi System (W/O Secondary Air Injection System) Ecm Power Source Circuit


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK NO. 1 INTEGRATION RELAY (POWER SOURCE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).Sfi System (W/O Secondary Air Injection System) Ecm Power Source Circuit

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

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    1H-1 - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to No. 1 Integration Relay)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - BATTERY)
OK


2.INSPECT NO. 1 INTEGRATION RELAY (MAIN)

  1. Inspect the No. 1 integration relay (MAIN) (HILUX_TGN26 RM000003BLB021X_01_0019.html).



NG
REPLACE NO. 1 INTEGRATION RELAY
OK


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

  1. Check the harness and connectors between the No. 1 integration relay and ECM.

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

    2. Disconnect the ECM connector.

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

      Standard Resistance:

      Tester Connection
      		Condition
      		Specified Condition
      G89-8 (MREL) - 1J-2
      		Always
      		Below 1 Ω
      G89-1 (+B) - 1J-4
      		Always
      		Below 1 Ω
      G89-8 (MREL) or 1J-2 - Body ground
      		Always
      		10 kΩ or higher
      G89-1 (+B) or 1J-4 - Body ground
      		Always
      		10 kΩ or higher

  1. Check the harness and connectors between the No. 1 integration relay and body ground.

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

      Standard Resistance:

      Tester Connection
      		Condition
      		Specified Condition
      1J-3 - Body ground
      		Always
      		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.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
    C75-3 (E1) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.INSPECT ECM (IGSW VOLTAGE)
Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System).Sfi System (W/O Secondary Air Injection System) Ecm Power Source Circuit

  1. Disconnect the ECM connectors.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G89-9 (IGSW) - C75-3 (E1)
    		Ignition switch ON
    		11 to 14 V
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to ECM)


NG
Go to step 6
OK

REPLACE ECM (HILUX_TGN26 RM000000VW202LX.html)

6.CHECK HARNESS AND CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)

  1. Disconnect the ECM connector.

  1. Disconnect the ignition switch connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    G9-6 (IG2) - G89-9 (IGSW)
    		Always
    		Below 1 Ω
    G9-6 (IG2) or G89-9 (IGSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


7.INSPECT IGNITION SWITCH ASSEMBLY

  1. Inspect the ignition switch assembly (HILUX_TGN26 RM00000135X01BX.html).



NG
REPLACE IGNITION SWITCH ASSEMBLY (HILUX_TGN26 RM00000135Z01BX.html)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (IGNITION SWITCH - BATTERY)