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

INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND)

CHECK POWER MANAGEMENT CONTROL ECU

CONFIRMATION TEST

ENTRY AND START SYSTEM (for Start Function) - Power Source Mode does not Change to ON (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.
HINT:
To allow use of the intelligent tester to inspect the push-button start function when the engine switch is off, repeatedly open and close any of the doors. Repeatedly opening and closing a door establishes communication between the intelligent tester and power management control ECU (opening and closing a door can also be simulated by operating a door courtesy light switch).

WIRING DIAGRAM

Refer to "Power Source Mode does not Change to on (IG and ACC)" (LandCruiser RM000003U3G028X_02.html).

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 (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 (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.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY)


    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 (Acc)

  1. Remove the driver side junction block assembly.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2A-48 - 2D-4
    		20°C (68°F)
    		101.25 to 123.75 Ω
    Text in Illustration
    *a
    		Component without harness connected
    (Driver Side Junction Block Assembly)


NG
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)
OK


4.CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

  1. Disconnect the G51 power management control ECU connector.

  1. Disconnect the 2A driver side junction block assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G51-19 (ACCD) - 2A-48
    		Always
    		Below 1 Ω
    G51-19 (ACCD) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND)

  1. Disconnect the 2D driver side junction block assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2D-4 - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


6.CHECK POWER MANAGEMENT CONTROL ECU


  1. Connect the 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 (Acc)


    Text in Illustration
    *a
    		Component with harness connected
    (Power Management Control ECU)
    		-
    		-

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

    Standard Voltage:

    Tester Connection
    		Switch Condition
    		Specified Condition
    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


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


7.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)