Blocking System Engine Does Not Start

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK BLOCKING SYSTEM (SETTING)

CHECK TRANSPONDER KEY ECU ASSEMBLY (OUTPUT)

REPLACE TRANSPONDER KEY ECU ASSEMBLY

REGISTER ECU COMMUNICATION ID

CHECK WHETHER ENGINE STARTS

REGISTER ECU COMMUNICATION ID

CHECK WHETHER ENGINE STARTS

DESCRIPTION

1. There is an open or short circuit between the telephone transceiver assembly and the ECM or transponder key ECU assembly.
   
2. The blocking system is set.
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

1. Before troubleshooting this symptom, make sure no engine immobiliser system DTCs or blocking system DTCs are present. If present, troubleshoot the engine immobiliser system DTCs or blocking system DTCs first.
   
2. When replacing the telephone transceiver assembly, refer to the Service Bulletin.
   
3. When the telephone transceiver assembly is replaced, it is necessary to set the contract mode.
   
4. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
   

1. Check the blocking system setting.
   

   HINT:

   Check with the customer's contracted service provider to determine whether the blocking system is set.

   Result

   Result	Proceed to
   Blocking system is set.	A
   Blocking system is unset.	B

1. Using an oscilloscope, check the waveform.
   

   Measurement Condition

   Item	Content
   Tester Connection	G26-13 (EFIO) - G26-16 (GND)
   Tool Setting	10 V/DIV., 100 ms./DIV.
   Condition	Ignition switch ON

   HINT:

   1. The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
      
   2. Check the waveform when the security indicator light is off (the engine immobiliser system is unset). If the security indicator light does not turn off (the engine immobiliser system cannot be unset), refer to the engine immobiliser system.
      

   OK:

   Waveform is output normally (refer to illustration).
   

   Result

   Result	Proceed to
   NG (stuck LOW)	A
   NG (stuck HI)	B
   OK	C

   Text in Illustration

   *1	Waveform
   *a	Component with harness connected (Transponder Key ECU Assembly)

1. Temporarily replace the transponder key ECU assembly with a new one (Refer to the Service Bulletin).
   

1. Register the ECU - ECM communication ID (Refer to the Service Bulletin).
   

1. Check that the engine starts normally.
   

   OK:

   Engine starts normally.
   

1. Register the ECU - ECM communication ID (Refer to the Service Bulletin).
   

1. Check that the engine starts normally.
   

   OK:

   Engine starts normally.