IMMOBILISER SYSTEM(w/o Entry and Start System) Engine does not Start but Initial Combustion Occurs

DESCRIPTION

If the key ID codes of the key and transponder key ECU assembly match, the immobiliser system is unset and the engine start permission signal is sent to the ECM. When the ID codes of the transponder key ECU assembly and ECM match, the engine starts.

WIRING DIAGRAM

1. w/o Blocking System

2. w/ Blocking System


*a	Telephone Transceiver Assembly
*b	Transponder Key ECU Assembly

CAUTION / NOTICE / HINT

Note

If the transponder key ECU assembly, telephone transceiver assembly* or ECM is replaced, refer to the Service Bulletin.
When using the GTS with the vehicle ignition switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Immobiliser. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

*: w/ Blocking System

PROCEDURE

CLEAR DTC

Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs
Powertrain > Engine > Clear DTCs
Body Electrical > Immobiliser > Clear DTCs
Body Electrical > Telematics > Clear DTCs

Result

Proceed to
NEXT

CHECK FOR DTC

Check for DTCs.

Click here

Powertrain > Engine and ECT > Trouble Codes
Powertrain > Engine > Trouble Codes
Body Electrical > Immobiliser > Trouble Codes
Body Electrical > Telematics > Trouble Codes

Tech Tips

Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

Result

Proceed to
DTCs are not output (for Gasoline)
DTCs are not output (for Diesel)
DTCs are output

DTCs are not output (for Diesel)

GO TO STEP 4 Click here

DTCs are output

GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

DTCs are not output (for Gasoline)

READ VALUE USING GTS (IMMOBILISER FUEL CUT)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Body Electrical / Engine and ECT / Data List.

Read the Data List according to the display on the GTS.

Powertrain > Engine and ECT > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Immobiliser Fuel Cut	Status of immobiliser system fuel cut	OFF/ON	-	-

Powertrain > Engine and ECT > Data List

Tester Display
Immobiliser Fuel Cut

OK
OFF is displayed after the engine is started.

Result

Proceed to
OK (for 2AR-FE)
OK (for 3ZR-FAE)
OK (for 3ZR-FE)
NG

OK (for 2AR-FE)

GO TO SFI SYSTEM Click here

OK (for 3ZR-FAE)

GO TO SFI SYSTEM Click here

OK (for 3ZR-FE)

GO TO SFI SYSTEM Click here

CHECK WHETHER ENGINE STARTS

Using a registered key, turn the ignition switch to ON.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

Result

Proceed to
Engine can be started
Engine cannot be started

Engine can be started

USE SIMULATION METHOD TO CHECK Click here

Engine cannot be started

Tech Tips

Refer to the Service Bulletin.

Result

Proceed to
NEXT

CHECK WHETHER ENGINE STARTS

Using a registered key, turn the ignition switch to ON.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

Result

Proceed to
Engine can be started
Engine cannot be started (w/o Blocking System)
Engine cannot be started (w/ Blocking System)

Engine can be started

END (REGISTERED COMMUNICATION ID WAS DEFECTIVE)

Engine cannot be started (w/ Blocking System)

CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - TRANSPONDER KEY ECU AND ECM) Click here

Engine cannot be started (w/o Blocking System)

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU - ECM)

Disconnect the G88 transponder key ECU assembly connector.
Disconnect the A62*1 or A61*2 ECM connector.
- *1: for Gasoline
- *2: for Diesel

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

Standard Resistance

for Gasoline

Tester Connection	Condition	Specified Condition
G88-12 (EFII) - A62-29 (IMO)	Always	Below 1 Ω
G88-12 (EFII) - Body ground	Always	10 kΩ or higher
A62-29 (IMO) - Body ground	Always	10 kΩ or higher
G88-13 (EFIO) - A62-28 (IMI)	Always	Below 1 Ω
G88-13 (EFIO) - Body ground	Always	10 kΩ or higher
A62-28 (IMI) - Body ground	Always	10 kΩ or higher

for Diesel

Tester Connection	Condition	Specified Condition
G88-12 (EFII) - A61-15 (IMO)	Always	Below 1 Ω
G88-12 (EFII) - Body ground	Always	10 kΩ or higher
A61-15 (IMO) - Body ground	Always	10 kΩ or higher
G88-13 (EFIO) - A61-16 (IMI)	Always	Below 1 Ω
G88-13 (EFIO) - Body ground	Always	10 kΩ or higher
A61-16 (IMI) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE TRANSPONDER KEY ECU ASSEMBLY

Replace the transponder key ECU assembly with a new one.

Tech Tips

Refer to the Service Bulletin.

Note

Key ID code registration is necessary when replacing the transponder key ECU assembly.

Refer to the Service Bulletin.

Result

Proceed to
NEXT

CHECK WHETHER ENGINE STARTS

Using a registered key, turn the ignition switch to ON.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK
Engine starts normally.

Result

Proceed to
OK
NG (for 2AR-FE)
NG (for 3ZR-FAE)
NG (for 3ZR-FE)
NG (for 1AD-FTV)
NG (for 2AD-FTV)
NG (for 2AT-FHV)

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

NG (for 2AR-FE)

REPLACE ECM Click here

NG (for 3ZR-FAE)

REPLACE ECM Click here

NG (for 3ZR-FE)

REPLACE ECM Click here

NG (for 1AD-FTV)

REPLACE ECM Click here

NG (for 2AD-FTV)

REPLACE ECM Click here

NG (for 2AT-FHV)

REPLACE ECM Click here

CHECK HARNESS AND CONNECTOR (TELEPHONE TRANSCEIVER ASSEMBLY - TRANSPONDER KEY ECU AND ECM)

Disconnect the G58 telephone transceiver assembly connector.
Disconnect the G58 transponder key ECU assembly connector.
Disconnect the A62 ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G58-1 (BLK1) - G88-12 (EFII)	Always	Below 1 Ω
G58-7 (BLK2) - A62-29 (IMO)	Always	Below 1 Ω
G58-8 (BLK3) - A62-28 (IMI)	Always	Below 1 Ω
G58-2 (BLK4) - G88-13 (EFIO)	Always	Below 1 Ω
G58-1 (BLK1) - Body ground	Always	10 kΩ or higher
G58-7 (BLK2) - Body ground	Always	10 kΩ or higher
G58-8 (BLK3) - Body ground	Always	10 kΩ or higher
G58-2 (BLK4) - Body ground	Always	10 kΩ or higher
G88-12 (EFII) - Body ground	Always	10 kΩ or higher
G88-13 (EFIO) - Body ground	Always	10 kΩ or higher
A62-28 (IMI) - Body ground	Always	10 kΩ or higher
A62-29 (IMO) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE TRANSPONDER KEY ECU ASSEMBLY

Replace the transponder key ECU assembly with a new one.

Tech Tips

Refer to the Service Bulletin.

Note

Key ID code registration is necessary when replacing the transponder key ECU assembly.

Refer to the Service Bulletin.

Result

Proceed to
NEXT

CHECK WHETHER ENGINE STARTS

Using a registered key, turn the ignition switch to ON.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK
Engine starts normally.

Result

Proceed to
OK
NG

END (TRANSPONDER KEY ECU ASSEMBLY WAS DEFECTIVE)

REPLACE ECM

Temporarily replace the ECM with a new one.

for 2AR-FE:

Click here

for 3ZR-FE:

Click here

Result

Proceed to
NEXT

Reregister the ECU communication ID.

Tech Tips

Refer to the Service Bulletin.

Result

Proceed to
NEXT

CHECK WHETHER ENGINE STARTS

Using a registered key, turn the ignition switch to ON.

Check that the engine starts 5 seconds after the ignition switch was turned to ON.

OK
Engine starts normally.

Result

Proceed to
OK
NG

END (ECM WAS DEFECTIVE)

REPLACE TELEPHONE TRANSCEIVER ASSEMBLY