Sfi System Cranking Holding Function Circuit

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
1Gr-Fe Engine Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CRANKING

READ VALUE USING GTS (STARTER SIGNAL)

INSPECT STARTER RELAY (ST)

CHECK HARNESS AND CONNECTOR (ST RELAY - PNP SWITCH, CLUTCH START SWITCH)

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

INSPECT STARTER

INSPECT STARTER CUT RELAY (ST CUT)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)

INSPECT PARK/NEUTRAL POSITION SWITCH

CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)

INSPECT STARTER CUT RELAY (ST CUT)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - CLUTCH START SWITCH, ECM)

INSPECT CLUTCH START SWITCH ASSEMBLY

CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

CHECK HARNESS AND CONNECTOR (ST CUT RELAY - CLUTCH START SWITCH SWITCH, ECM)

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

SFI SYSTEM - Cranking Holding Function Circuit


DESCRIPTION

The cranking holding control system provides current to the starter when the ECM detects the engine switch start signal (STSW). When the ECM performs a firing judgment, the system cuts current to the starter. When an ECM receives the STSW signal, it turns off the ACC relay, which prevents flickering of the combination meter, clock, audio system, etc. Also, the ECM sends a signal to the STAR terminal of the ECM. Then the STAR output signal travels through the Park/Neutral Position (PNP) switch to the ST relay, causing the starter to activate.
When the engine is cranking, the starter operation signal is sent to the STA terminal of the ECM.

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit


WIRING DIAGRAM

Refer to DTC P0617 (Click here).

INSPECTION PROCEDURE

1.CHECK CRANKING

  1. Check the cranking of the engine.

    Result
    Test Result
    		Proceed to
    Cranking possible and holding control operates
    		A
    Does not crank
    		B
    Cranking possible but holding control does not operate (for automatic transmission)
    		C
    Cranking possible but holding control does not operate (for manual transmission)
    		D


B
Go to step 2

C
Go to step 11

D
Go to step 17
A

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

2.READ VALUE USING GTS (STARTER SIGNAL)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

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

  1. Read values.

  1. Check the result when the ignition switch is turned to ON and when the engine is started.

    OK:
    Condition
    		Display (Starter Signal)
    Ignition switch ON
    		OFF
    Engine is started
    		ON
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for automatic transmission)
    		B
    NG (for manual transmission)
    		C


B
Go to step 7

C
Go to step 13
A


3.INSPECT STARTER RELAY (ST)

  1. Inspect the starter relay (ST) (Click here).



NG
REPLACE STARTER RELAY (ST)
OK


4.CHECK HARNESS AND CONNECTOR (ST RELAY - PNP SWITCH, CLUTCH START SWITCH)

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the Park/Neutral Position (PNP) switch (for automatic transmission).

  1. Disconnect the clutch start switch (for manual transmission).

  1. Remove the ST relay from the engine room relay block.

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

    Standard Resistance:
    for automatic transmission
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (2) - C24-5
    		Always
    		Below 1 Ω
    ST relay (2) or C24-5 - Body ground
    		Always
    		10 kΩ or higher
    ST relay (1)* - C24-5
    		Always
    		Below 1 Ω
    ST relay (1)* or C24-5 - Body ground
    		Always
    		10 kΩ or higher
    for manual transmission
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (2) - A49-2
    		Always
    		Below 1 Ω
    ST relay (2) or A49-2 - Body ground
    		Always
    		10 kΩ or higher
    *: GRJ200L-GNANKC


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (POWER SOURCE)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the ST relay from the engine room relay block.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    ST relay (1) - ST relay (5)
    		Always
    		11 to 14 V
    ST relay (2)* - ST relay (5)
    		Always
    		11 to 14 V
    *: GRJ200L-GNANKC


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER RELAY (ST) - BATTERY, BODY GROUND)
OK


6.INSPECT STARTER

  1. Inspect the starter (Click here).



NG
REPLACE STARTER (Click here)
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR (STARTER - STARTER RELAY (ST), BATTERY)

7.INSPECT STARTER CUT RELAY (ST CUT)

  1. Inspect the starter cut relay (ST CUT) (Click here).



NG
REPLACE STARTER CUT RELAY (ST CUT)
OK


8.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the starter cut relay (ST CUT) from the engine room relay block.

  1. Disconnect the PNP switch connector.

  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
    ST CUT relay (5) - C45-16 (STAR)
    		Always
    		Below 1 Ω
    ST CUT relay (3) - C24-4
    		Always
    		Below 1 Ω
    ST CUT relay (5) or C45-16 (STAR) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT relay (3) or C24-4 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


9.INSPECT PARK/NEUTRAL POSITION SWITCH


    Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Inspect the Park/Neutral Position (PNP) switch.

    1. Disconnect the PNP switch connector.

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

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      4 (B) - 5 (L)
      		Shift lever in P
      		Below 1 Ω
      Shift lever in N
      		Below 1 Ω


NG
REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (Click here)
OK


10.CHECK HARNESS AND CONNECTOR (PNP SWITCH - ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the PNP switch connector.

  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
    C24-5 - A38-46 (STA)
    		Always
    		Below 1 Ω
    C24-5 or A38-46 (STA) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B


B
Go to step 19
A

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  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
    E4-4 (STSW) - A38-14 (STSW)
    		Always
    		Below 1 Ω
    E4-4 (STSW) or A38-14 (STSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


12.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - PNP SWITCH, ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the starter cut relay (ST CUT) from the engine room relay block.

  1. Disconnect the PNP switch connector.

  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
    ST CUT relay (5) - C45-16 (STAR)
    		Always
    		Below 1 Ω
    ST CUT relay (3) - C24-4
    		Always
    		Below 1 Ω
    ST CUT relay (5) or C45-16 (STAR) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT relay (3) or C24-4 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)

13.INSPECT STARTER CUT RELAY (ST CUT)

  1. Inspect the starter cut relay (ST CUT) (Click here).



NG
REPLACE STARTER CUT RELAY (ST CUT)
OK


14.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - CLUTCH START SWITCH, ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the starter cut relay (ST CUT) from the engine room relay block.

  1. Disconnect the clutch start switch connector.

  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
    ST CUT relay (5) - C45-16 (STAR)
    		Always
    		Below 1 Ω
    ST CUT relay (3) - A49-1
    		Always
    		Below 1 Ω
    ST CUT relay (5) or C45-16 (STAR) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT relay (3) or A49-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


15.INSPECT CLUTCH START SWITCH ASSEMBLY

  1. Inspect the clutch start switch (for LHD) (Click here).

  1. Inspect the clutch start switch (for RHD) (Click here).

    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD)
    		B
    NG (for RHD)
    		C


B
REPLACE CLUTCH START SWITCH ASSEMBLY (Click here)

C
REPLACE CLUTCH START SWITCH ASSEMBLY (Click here)
A


16.CHECK HARNESS AND CONNECTOR (CLUTCH START SWITCH - ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the clutch start switch connector.

  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
    A49-2 - A38-46 (STA)
    		Always
    		Below 1 Ω
    A49-2 or A38-46 (STA) - Body ground
    		Always
    		10 kΩ or higher
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B


B
Go to step 19
A

REPAIR OR REPLACE HARNESS OR CONNECTOR

17.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)

Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Disconnect the main body ECU connector.

  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
    E4-4 (STSW) - A38-14 (STSW)
    		Always
    		Below 1 Ω
    E4-4 (STSW) or A38-14 (STSW) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


18.CHECK HARNESS AND CONNECTOR (ST CUT RELAY - CLUTCH START SWITCH SWITCH, ECM)
Land Cruiser. Urj200, 202 Grj200 Vdj200.1Gr-Fe Engine Control.Sfi System.Sfi System Cranking Holding Function Circuit

  1. Remove the starter cut relay (ST CUT) from the engine room relay block.

  1. Disconnect the clutch start switch connector.

  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
    ST CUT relay (5) - C45-16 (STAR)
    		Always
    		Below 1 Ω
    ST CUT relay (3) - A49-1
    		Always
    		Below 1 Ω
    ST CUT relay (5) or C45-16 (STAR) - Body ground
    		Always
    		10 kΩ or higher
    ST CUT relay (3) or A49-1 - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Click here)

19.REPLACE ECM

  1. Replace the ECM (Click here).


NEXT


20.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Check the starter operation.

    OK:
    Malfunction has been repaired successfully.


NG
GO TO ENTRY AND START SYSTEM (ENGINE DOES NOT START) (Click here)
OK

END