When the certification ECU (smart key ECU assembly) has detected the key inside the cabin before the brake pedal (for A/T) or clutch pedal (for M/T) is depressed, the power source mode can be changed in the following order sequentially by pressing the engine switch: off → on (ACC) → on (IG) → off.

When one of the DTCs shown in the illustration below is detected, troubleshoot the DTC(s) by following the troubleshooting procedure relevant to the DTC(s). If the power source mode still cannot be changed normally, despite troubleshooting, one of the following may have occurred:

The LIN communication line is malfunctioning.

The certification ECU (smart key ECU assembly) has determined that no key is inside the cabin.

The engine switch is malfunctioning.

The main body ECU is malfunctioning.

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

WIRING DIAGRAM

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

HINT:

If the vehicle is in key cancel mode, change to normal mode ().

1.CHECK DTC OUTPUT

Check whether a DTC is output ().

Result
Result	Proceed to
No DTC output	A
DTC output	B

GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) (DIAGNOSTIC TROUBLE CODE CHART) ()

A

2.CHECK ENTRY AND START SYSTEM

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Remove the battery of the electrical key transmitter ().

With the brake pedal (for A/T) or clutch pedal (for M/T) depressed, touch the key to the engine switch, as shown in the illustration.

When operating the engine switch, check whether the engine switch changes to on (ACC) or on (IG).

HINT:

When the electrical key transmitter cannot be verified even when it is in the operational area, the engine start check can be performed by removing the transmitter battery from the electrical key transmitter and holding the transmitter against the engine switch.

When performing the check, if the engine switch turns on (ACC) or on (IG), there is a problem with key certification inside the cabin.

Result
Result	Proceed to
Does not change to on (ACC)	A
Does not change to on (IG)	B
Does not change to on (ACC) and on (IG)	C
Changes to on (ACC) and on (IG)	D

Go to step 5

Go to step 11

GO TO ENTRY AND START SYSTEM (FOR ENTRY FUNCTION) (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) ()

A

3.INSPECT FUSE (AM2)

Remove the AM2 fuse from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
AM2 fuse Always Below 1 Ω

REPLACE FUSE

OK

4.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E1, E2, 2A and 2D main body ECU connectors.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E1-6 (AM1) - Body ground Always 11 to 14 V
E2-1 (AM2) - Body ground Always 11 to 14 V
2A-1 - Body ground Always 11 to 14 V

Standard Resistance:
Tester Connection Condition Specified Condition
E1-22 (ACCD) - 2D-45 Always Below 1 Ω
2D-62 (GND2) - Body ground Always Below 1 Ω
E1-22 (ACCD) or 2D-45 - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

5.INSPECT FUSE (AM2)

Remove the AM2 fuse from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
AM2 fuse Always Below 1 Ω

REPLACE FUSE

OK

6.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E1, E2, 2A and 2D main body ECU connectors.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E1-6 (AM1) - Body ground Always 11 to 14 V
E2-1 (AM2) - Body ground Always 11 to 14 V
2A-1 - Body ground Always 11 to 14 V

Standard Resistance:
Tester Connection Condition Specified Condition
E1-3 (IG1D) - 2D-43 Always Below 1 Ω
2D-62 (GND2) - Body ground Always Below 1 Ω
E1-3 (IG1D) or 2D-43 - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.INSPECT INTEGRATION RELAY (IG2 RELAY)

Remove the integration relay from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
1B-8 - 1C-1 Battery voltage applied to terminals 1B-6 and 1B-7 Below 1 Ω
1B-8 - 1C-1 Battery voltage not applied to terminals 1B-6 and 1B-7 10 kΩ or higher

REPLACE INTEGRATION NO.1 RELAY (IG2 RELAY)

OK

8.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INTEGRATION RELAY (IG2 RELAY))

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E2 main body ECU connector.

Disconnect the 1B integration relay connector.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E2-11 (IG2D) - 1B-6 Always Below 1 Ω
1B-7 - Body ground Always Below 1 Ω
E2-11 (IG2D) or 1B-6 - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.INSPECT FUSE (IGN, IG2 MAIN)

Remove the IGN fuse and IG2 MAIN fuse from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
IGN fuse Always Below 1 Ω
IG2 MAIN fuse Always Below 1 Ω

REPLACE FUSE

OK

10.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - INTEGRATION RELAY (IG2 RELAY))

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E26 steering lock ECU connector.

Disconnect the 1B and 1C integration relay connectors.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1C-1 - Body ground Always 11 to 14 V

Standard Resistance:
Tester Connection Condition Specified Condition
E26-6 (IG2) - 1B-8 Always Below 1 Ω
E26-6 (IG2) or 1B-8 - Body ground Always 10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

11.INSPECT FUSE (AM2)

Remove the AM2 fuse from the engine room relay block.

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

Standard Resistance:
Tester Connection Condition Specified Condition
AM2 fuse Always Below 1 Ω

REPLACE FUSE

OK

12.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E1, E2 and 2D main body ECU connectors.

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

Standard Voltage:
Tester Connection Condition Specified Condition
E1-6 (AM1) - Body ground Always 11 to 14 V
E2-1 (AM2) - Body ground Always 11 to 14 V

Standard Resistance:
Tester Connection Condition Specified Condition
2D-62 (GND2) - Body ground Always Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.INSPECT ENGINE SWITCH

Disconnect the E18 engine switch connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
7 (SS1) - 5 (GND)	Pushed	Below 1 Ω
2 (SS2) - 5 (GND)	Pushed	Below 1 Ω
7 (SS1) - 5 (GND)	Not pushed	10 kΩ or higher
2 (SS2) - 5 (GND)	Not pushed	10 kΩ or higher

Result
Result	Proceed to
Within specified range	A
Outside specified range (for 1GR-FE)	B
Outside specified range (for 1UR-FE)	C
Outside specified range (for 3UR-FE)	D
Outside specified range (for 1VD-FTV)	E

REPLACE ENGINE SWITCH ()

A

14.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ENGINE SWITCH AND BODY GROUND)

Entry And Start System (For Start Function) - Power Source Mode Does Not Change. THEFT DETERRENT / KEYLESS ENTRY. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E1 main body ECU connector.

Disconnect the E18 engine switch connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E1-17 (SSW1) - E18-7 (SS1)	Always	Below 1 Ω
E1-16 (SSW2) - E18-2 (SS2)	Always	Below 1 Ω
E18-5 (GND) - Body ground	Always	Below 1 Ω
E1-17 (SSW1) or E18-7 (SS1) - Body ground	Always	10 kΩ or higher
E1-16 (SSW2) or E18-2 (SS2) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE MAIN BODY ECU

THEFT DETERRENT / KEYLESS ENTRY

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

ENTRY AND START SYSTEM for Start Function