Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

READ VALUE USING INTELLIGENT TESTER (KEY CERTIFI WAIT T-OUT)

READ VALUE USING INTELLIGENT TESTER (START SWITCH 1, 2)

CHECK POWER MANAGEMENT CONTROL ECU

CONFIRMATION TEST

INSPECT ENGINE SWITCH

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE SWITCH)

CHECK FOR DTC

ENTRY AND START SYSTEM (for Start Function) - Power Source Mode does not Change to ON (IG and ACC)


DESCRIPTION

When the engine switch is pushed with the key in the cabin, the power management control ECU receives signals to switch the power source mode.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)


INSPECTION PROCEDURE

NOTICE:
  1. When using the intelligent tester with the engine switch off to troubleshoot: Connect the intelligent tester to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
  2. Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)

  1. Disconnect the G51 power management control ECU connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G51-2 (AM21) - Body ground
    		Always
    		9.5 to 14 V
    G51-1 (AM22) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

  1. Disconnect the G51 power management control ECU connector.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G51-6 (GND) - Body ground
    		Always
    		Below 1 Ω
    G51-5 (GND2) - Body ground
    Text in Illustration
    *a
    		Rear view of wire harness connector
    (to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.READ VALUE USING INTELLIGENT TESTER (KEY CERTIFI WAIT T-OUT)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the intelligent tester on.

    HINT:
    When using the intelligent tester with the engine switch off, turn any of the door courtesy light switches on and off repeatedly at intervals of 1.5 seconds or less until communication between the tester and vehicle starts.

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. Read the Data List and check that "No" is displayed 1 second after turning the engine switch from off to on (IG).

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Key Certifi Wait T-Out
    		Key certification waiting timed out / Yes or No
    		Yes: Key certification waiting timed out
    No: Key certification completed within specified time
    		-
    OK:
    "No" is displayed 1 second after turning the engine switch from off to on (IG).


NG
Go to step 9
OK


4.READ VALUE USING INTELLIGENT TESTER (START SWITCH 1, 2)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. According to the display on the intelligent tester, read the Data List.

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Start Switch1
    		Start Switch 1 / ON or OFF
    		ON: Engine switch pushed
    OFF: Engine switch not pushed
    		-
    Start Switch2
    		Start Switch 2 / ON or OFF
    		ON: Engine switch pushed
    OFF: Engine switch not pushed
    		-
    OK:
    The display changes in response to the operation of the engine switch.


NG
Go to step 7
OK


5.CHECK POWER MANAGEMENT CONTROL ECU

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. Read the Data List and check that the display changes according to the changes in the power source mode when the engine switch is pushed.

    Power Source Control
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Power Supply Condition
    		Power Supply Condition / IG2 ON, ST ON, All OFF, IG1 ON or ACC ON
    		IG2 ON: IG2 relay on
    ST ON: ST request signal on
    All OFF: All relays off
    IG1 ON: IG1 relay on
    ACC ON: ACC relay on
    		-
    OK:
    Display changes according to the changes in the power source mode when the engine switch is pushed.


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)


    Text in Illustration
    *a
    		Component with harness connected
    (Power Management Control ECU)
    		-
    		-
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    G51-20 (IG1D) - Body ground
    		Engine switch off
    		Below 1 V
    Engine switch on (ACC)
    Engine switch on (IG)
    		 ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
    G50-8 (IG2D) - Body ground
    		Engine switch off
    		Below 1 V
    Engine switch on (ACC)
    Engine switch on (IG)
    		 ((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
    G51-19 (ACCD) - Body ground
    		Engine switch off
    		Below 1 V
    Engine switch on (ACC)
    		((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher
    Engine switch on (IG)
    		((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher


NG
REPLACE POWER MANAGEMENT CONTROL ECU (LandCruiser RM0000039R5026X.html)
OK


6.CONFIRMATION TEST

  1. Check that the power source mode changes to on (ACC) and on (IG) when operating the engine switch.

    OK:
    The power source mode changes to on (ACC) and on (IG) in response to the operation of the engine switch.


NG
CHECK RELAY CONTACT SIDE CIRCUIT
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

7.INSPECT ENGINE SWITCH


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) Power Source Mode Does Not Change To On (Ig And Acc)

  1. Remove the engine switch.

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

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    7 (SS1) - 5 (GND)
    		Engine switch not pushed
    		10 kΩ or higher
    Engine switch pushed
    		Below 1 Ω
    2 (SS2) - 5 (GND)
    		Engine switch not pushed
    		10 kΩ or higher
    Engine switch pushed
    		Below 1 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (Engine Switch)
    HINT:
    1. for 1GR-FE (LHD): LandCruiser RM000002YWC047X.html.
    2. for 1GR-FE (RHD): LandCruiser RM000002YWC048X.html.
    3. for 2TR-FE: LandCruiser RM000002YWC046X.html.
    4. for 1KD-FTV (LHD): LandCruiser RM000002YWC049X.html.
    5. for 1KD-FTV (RHD): LandCruiser RM000002YWC04AX.html.
    6. for 1GD-FTV (LHD): LandCruiser RM000002YWC04BX.html.
    7. for 1GD-FTV (RHD): LandCruiser RM000002YWC04CX.html.


NG
REPLACE ENGINE SWITCH
OK


8.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - ENGINE SWITCH)

  1. Disconnect the G51 power management control ECU connector.

  1. Disconnect the G36 engine switch connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G51-17 (SSW2) - G36-2 (SS2)
    		Always
    		Below 1 Ω
    G51-18 (SSW1) - G36-7 (SS1)
    G51-17 (SSW2) - Body ground
    		Always
    		10 kΩ or higher
    G51-18 (SSW1) - Body ground
    G36-5 (GND) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE POWER MANAGEMENT CONTROL ECU (LandCruiser RM0000039R5026X.html)

9.CHECK FOR DTC

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Power Source / DTC.

  1. Read the DTCs.

  1. Enter the following menus: Body / Entry&Start / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    None of the following DTCs are output:
    B2785 Communication Malfunction between ECUs Connected by LIN
    B2287 LIN Communication Master Malfunction
    B2784 Antenna Coil Open/Short
    		A
    DTC B2287 is output but B2785 is not
    		B
    A DTC other than B2287 is output.
    		C


B
GO TO DTC (B2287) (LandCruiser RM000002S8G04TX.html)

C
GO TO DTC CHART (LandCruiser RM000000XIZ0K8X.html)
A

GO TO ENTRY AND START SYSTEM (FOR ENTRY FUNCTION) (Room Oscillator does not Recognize Key) (LandCruiser RM000000XUU0ENX.html)