Sfi System Starter Signal Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

CHECK HARNESS AND CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)

CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH)

SFI SYSTEM - Starter Signal Circuit


DESCRIPTION

While the engine is being cranked, current flows from terminal ST1 of the ignition switch to the park/neutral position switch (for automatic transmission) or clutch start switch (for manual transmission) and also flows to terminal STA of the ECM (STA Signal).

WIRING DIAGRAM

Refer to DTC P0617 (HILUX_TGN26 RM000000TA00XKX_05.html).

INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
This chart is based on the premise that the engine can be cranked normally. If the engine does not crank normally, proceed to Problem Symptoms Table (HILUX_TGN26 RM000003S3U02RX.html).
1.READ VALUE USING INTELLIGENT TESTER (STARTER SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Starter Signal.

  1. Read the value displayed on the tester when the ignition switch is ON and when the engine is started.

    OK:

    Ignition Switch Position
    		Starter Signal
    ON
    		Close
    START
    		Open
Result
Result
Proceed to
OK
A
NG (for Manual transmission)
B
NG (for Automatic transmission)
C


B
Go to step 2

C
Go to step 3
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (HILUX_TGN26 RM000003S3U02RX.html)

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

  1. Disconnect the ECM connector.

  1. Disconnect the ignition switch assembly connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    G146-8 (STA) - G9-7 (ST2)
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    G146-8 (STA) or G9-7 (ST2) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the ignition switch assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - IGNITION SWITCH ASSEMBLY)
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)

3.CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH)

  1. Disconnect the ECM connector.

  1. Disconnect the park/neutral position switch connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    G146-8 (STA) - C26-5
    		Always
    		Below 1 Ω
    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    G146-8 (STA) or C26-5 - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the park/neutral position switch connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH)
OK

REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)