ENGINE 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

CAUTION / NOTICE / HINT

Note

If the transponder key ECU 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.

PROCEDURE

CLEAR DTC
1. Clear the DTCs Click here.
NEXT
CHECK FOR DTC
1. Check for DTCs Click here.
  
  OK
  
  DTCs are not output.
NG
GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

OK

OK
DTCs are not output.

READ VALUE USING GTS (IMMOBILISER FUEL CUT)

Using the GTS, read the Data List Click here.

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

OK
OFF is displayed after the engine is started.

Result
Result	Proceed to
OK	A
NG (1NR-FE)	B
NG (1ND-TV)	C

GO TO SFI SYSTEM Click here

GO TO ECD SYSTEM Click here

CHECK WHETHER ENGINE STARTS
1. Using a registered key, turn the ignition switch to ON.
2. Check that the engine starts 5 seconds after the ignition switch was turned to ON.
  
  OK
  
  Engine starts normally.
OK
USE SIMULATION METHOD TO CHECK Click here

NG
REGISTER ECU COMMUNICATION ID
1. Register the communication ID between the transponder key ECU assembly and ECM.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT
CHECK WHETHER ENGINE STARTS
1. Using a registered key, turn the ignition switch to ON.
2. Check that the engine starts 5 seconds after the ignition switch was turned to ON.
  
  OK
  
  Engine starts normally.
OK
END (REGISTERED COMMUNICATION ID WAS DEFECTIV)

NG

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

Disconnect the F54 transponder key ECU assembly connector.
Disconnect the A58*1 or A59*2 ECM connector.

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

*1: for 1NR-FE
*2: for 1ND-TV

Standard Resistance (Check for Open)

Tester Connection	Condition	Specified Condition
F54-12 (EFII) - A58-29 (IMO)*1	Always	Below 1 Ω
F54-12 (EFII) - A59-78 (IMO)*2	Always	Below 1 Ω
F54-13 (EFIO) - A58-28 (IMI)*1	Always	Below 1 Ω
F54-13 (EFIO) - A59-77 (IMI)*2	Always	Below 1 Ω

Standard Resistance (Check for Short)

Tester Connection	Condition	Specified Condition
F54-12 (EFII) or A58-29 (IMO) - Body ground*1	Always	10 kΩ or higher
F54-12 (EFII) or A59-78 (IMO) - Body ground*2	Always	10 kΩ or higher
F54-13 (EFIO) or A58-28 (IMI) - Body ground*1	Always	10 kΩ or higher
F54-13 (EFIO) or A59-77 (IMI) - Body ground*2	Always	10 kΩ or higher

*1: for 1NR-FE
*2: for 1ND-TV

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE TRANSPONDER KEY ECU ASSEMBLY
1. 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.
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
Result	Proceed to
OK	A
NG (1NR-FE)	B
NG (1ND-TV)	C

END (TRANSPONDER KEY ECU WAS DEFECTIVE)

REPLACE ECM Click here