Theft Deterrent Keyless Entry. Engine Immobiliser System (W/O Entry And Start System) Engine Does Not Start Because No Initial Combustion

When the key is inserted into the ignition key cylinder, the antenna coil receives the key code. Then the amplifier amplifies the ID code and outputs it to the transponder key ECU assembly.
If this symptom occurs, there may be a communication problem between the transponder key amplifier and the transponder key ECU assembly.

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Engine Immobiliser System (W/O Entry And Start System) Engine Does Not Start Because No Initial Combustion

INSPECTION PROCEDURE

NOTICE:

When replacing the key and transponder key ECU assembly, refer to the Service Bulletin.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CLEAR DTC

Clear the DTCs (Click here).

NEXT

2.CHECK FOR DTC

Check for DTCs (Click here).
HINT:
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.
Result
Result
Proceed to
No DTC output
A
DTC output
B

Result
Result	Proceed to
No DTC output	A
DTC output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)

A

3.CONFIRM ENGINE MODELS

Check the vehicle specifications.
Result
Result
Proceed to
for 1GR-FE
A
for 1VD-FTV
B

Result
Result	Proceed to
for 1GR-FE	A
for 1VD-FTV	B

Go to step 5

A

4.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER FUEL CUT)

Turn the ignition switch off.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

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

Engine and ECT
Tester Display
Measurement Item/Range
Normal Condition
Stored as Freeze Frame Data
Immobiliser Fuel Cut
Status of immobiliser fuel cut/
ON or OFF
-
Yes
OK:
The item in the Data List indicates "OFF".

Engine and ECT
Tester Display	Measurement Item/Range	Normal Condition	Stored as Freeze Frame Data
Immobiliser Fuel Cut	Status of immobiliser fuel cut/ ON or OFF	-	Yes

Go to step 5

GO TO SFI SYSTEM (Click here)

5.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)

Turn the ignition switch off.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

Enter the following menus: Body / Immobiliser / Data List.

Immobiliser
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Immobiliser	Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset	Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder)) Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder))	When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.

OK:: On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.

Go to step 6

GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS (Click here)

6.READ VALUE USING INTELLIGENT TESTER (IMMOBILISER)

Perform inspection using a different key that has been registered to the vehicle.

Turn the ignition switch off.

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the intelligent tester on.

Enter the following menus: Body / Immobiliser / Data List.

Immobiliser
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Immobiliser	Engine immobiliser system status determined by transponder key ECU assembly / Set or Unset	Set: Engine immobiliser set (engine start prohibited (no key in ignition key cylinder)) Unset: Engine immobiliser unset (engine start permitted (key inserted in ignition key cylinder))	When the engine immobiliser system does not change to the unset state, this item can be used to determine if the cause is the transponder key ECU assembly.

OK:: On the intelligent tester screen, the display changes between Set and Unset as shown in the table above.

Go to step 8

OK

7.CHECK WHETHER ENGINE STARTS WITH OTHER KEYS

Perform inspection using a different key that has been registered to the vehicle.

Turn the ignition switch to ON, wait for 5 seconds, and then attempt to start the engine.
Result
Result
Proceed to
Engine cannot be started
A
Engine can be started
B

Result
Result	Proceed to
Engine cannot be started	A
Engine can be started	B

Go to step 20

GO TO ENGINE DOES NOT START BUT INITIAL COMBUSTION OCCURS (Click here)

8.CHECK TRANSPONDER KEY AMPLIFIER (VC5 SIGNAL)

Disconnect the E95 transponder key amplifier connector.

Using an oscilloscope, check the waveform.
1. Waveform (Reference)
  Measurement Condition
  Item
  Content
  Tester Connection
  E95-1 (VC5) - Body ground
  Tool Setting
  1 V/DIV., 20 ms./DIV.
  Condition
  Key inserted in ignition key cylinder
  OK:
  Waveform is output normally (refer to illustration).
  Text in Illustration
  *a
  Front view of wire harness connector
  (to Transponder Key Amplifier)
  *b
  Waveform

Measurement Condition
Item	Content
Tester Connection	E95-1 (VC5) - Body ground
Tool Setting	1 V/DIV., 20 ms./DIV.
Condition	Key inserted in ignition key cylinder

Text in Illustration
*a	Front view of wire harness connector (to Transponder Key Amplifier)
*b	Waveform

Go to step 9

REPLACE TRANSPONDER KEY ECU ASSEMBLY

9.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY, IG TERMINAL VOLTAGE)

Disconnect the E95 transponder key amplifier connector.

Disconnect the E96 transponder key ECU assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
E95-1 (VC5) - E96-14 (VC5)
Always
Below 1 Ω
E95-7 (AGND) - E96-5 (AGND)
Always
Below 1 Ω
E95-1 (VC5) - Body ground
Always
10 kΩ or higher

Reconnect the transponder key amplifier connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
E96-2 (IG) - E96-16 (GND)
Ignition switch ON
11 to 14 V
Text in Illustration
*a
Front view of wire harness connector
(to Transponder Key ECU Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.CHECK TRANSPONDER KEY AMPLIFIER (TXCT SIGNAL)

Disconnect the E95 transponder key amplifier connector.

Using an oscilloscope, check the waveform.
1. Waveform (Reference)
  Measurement Condition
  Item
  Content
  Tester Connection
  E95-5 (TXCT) - Body ground
  Tool Setting
  1 V/DIV., 20 ms./DIV.
  Condition
  Key inserted in ignition key cylinder
  OK:
  Waveform is output normally (refer to illustration).
  Text in Illustration
  *a
  Front view of wire harness connector
  (to Transponder Key Amplifier)
  *b
  Waveform

Go to step 11

REPLACE TRANSPONDER KEY ECU ASSEMBLY

11.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)

Disconnect the E95 transponder key amplifier connector.

Disconnect the E96 transponder key ECU assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
E95-5 (TXCT) - E96-4 (TXCT)
Always
Below 1 Ω
E95-5 (TXCT) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

12.CHECK TRANSPONDER KEY AMPLIFIER (CODE SIGNAL)

Disconnect the E95 transponder key amplifier connector.

Using an oscilloscope, check the waveform.
1. Waveform (Reference)
  Measurement Condition
  Item
  Content
  Tester Connection
  E95-4 (CODE) - Body ground
  Tool Setting
  1 V/DIV., 20 ms./DIV.
  Condition
  Key inserted in ignition key cylinder
  OK:
  Waveform is output normally (refer to illustration).
  Text in Illustration
  *a
  Front view of wire harness connector
  (to Transponder Key Amplifier)
  *b
  Waveform

Go to step 13

REPLACE TRANSPONDER KEY ECU ASSEMBLY

13.CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY AMPLIFIER - TRANSPONDER KEY ECU ASSEMBLY)

Disconnect the E95 transponder key amplifier connector.

Disconnect the E96 transponder key ECU assembly connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
Condition
Specified Condition
E95-4 (CODE) - E96-15 (CODE)
Always
Below 1 Ω
E95-4 (CODE) - Body ground
Always
10 kΩ or higher

Reconnect the transponder key ECU assembly connector.

Reconnect the transponder key amplifier connector.

Using an oscilloscope, check the waveform.
1. Waveform (Reference)
  Measurement Condition
  Item
  Content
  Tester Connection
  E95-4 (CODE) - Body ground
  Tool Setting
  1 V/DIV., 20 ms./DIV.
  Condition
  Key inserted in ignition key cylinder
  OK:
  Waveform is output normally (refer to illustration).
  Text in Illustration
  *a
  Front view of wire harness connector
  (to Transponder Key Amplifier)
  *b
  Waveform
  Result
  Result
  Proceed to
  Terminal CODE stuck high (5 V)
  A
  Terminal CODE stuck low (1 V or less)
  B
  Problem in wire harness or connector
  C

Go to step 16

REPAIR OR REPLACE HARNESS OR CONNECTOR

A

14.REPLACE TRANSPONDER KEY AMPLIFIER

Replace the transponder key amplifier (Click here).

NEXT

15.CHECK WHETHER ENGINE STARTS

Check that the engine starts with an already registered vehicle key.
OK:
Engine starts normally.

Go to step 16

END (TRANSPONDER KEY AMPLIFIER WAS DEFECTIVE)

16.REPLACE TRANSPONDER KEY ECU ASSEMBLY

Replace the transponder key ECU assembly.

NEXT

17.REGISTER KEY

Reregister the key (refer to the Service Bulletin).

NEXT

18.REGISTER ECU COMMUNICATION ID

NEXT

19.CHECK WHETHER ENGINE STARTS

Check that the engine starts with an already registered vehicle key.
OK:
Engine starts normally.

Go to step 20

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

20.REPLACE KEY

Replace the transponder key master transmitter with a new one (refer to the Service Bulletin).

NEXT

21.REREGISTER KEY

Reregister the key (refer to the Service Bulletin).

NEXT

22.CHECK WHETHER ENGINE STARTS

Check that the engine starts with an already registered vehicle key.
OK:
Engine starts normally.
Result
Result
Proceed to
OK
A
NG (for 1GR-FE)
B
NG (for 1VD-FTV)
C

GO TO SFI SYSTEM (Click here)

GO TO ECD SYSTEM (Click here)

END (KEY (TRANSPONDER KEY MASTER TRANSMITTER) WAS DEFECTIVE)

Tester Connection	Condition	Specified Condition
E95-1 (VC5) - E96-14 (VC5)	Always	Below 1 Ω
E95-7 (AGND) - E96-5 (AGND)	Always	Below 1 Ω
E95-1 (VC5) - Body ground	Always	10 kΩ or higher

Tester Connection	Switch Condition	Specified Condition
E96-2 (IG) - E96-16 (GND)	Ignition switch ON	11 to 14 V

Result	Proceed to
Terminal CODE stuck high (5 V)	A
Terminal CODE stuck low (1 V or less)	B
Problem in wire harness or connector	C