Code No. P0513: Immobilizer Malfunction



caution
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID .)

FUNCTION



  • The engine-ECU transmits to and receives from KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS> a control signal to authenticate the ignition key.
note
  • This code may be displayed due to radio interference if there are multiple registered ignition keys nearby during engine start.
  • This code may be displayed when the transponder ID code is registered.
  • This code is also displayed when the ignition key code is not recognized.
  • When this code is displayed, it is also sent to KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS>

TROUBLE JUDGMENT


Check Conditions
  • Ignition switch is "ON" position.
  • After the engine is cranked.
Judgement Criterion
  • When it was different in the encrypted code sent from KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS> and operation result by engine-ECU.

FAIL-SAFE AND BACKUP FUNCTION



  • Engine start is prohibited.

PROBABLE CAUSES



  • Failed KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS>
  • Failed engine-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III other system diagnosis code



  • Reconfirmation whether diagnosis code is output from KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS>.

Q. Is the diagnosis code set?

Perform the troubleshooting of KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS> (Refer to GROUP 42B - Troubleshooting - Diagnosis Code Chart <Vehicles with KOS>, Refer to GROUP 54A - Troubleshooting - Diagnosis Code Chart <Vehicles without KOS>).
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

Replace the KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS>. After the replacement, put the each identification code into KOS-ECU <Vehicles with KOS> or ETACS-ECU <Vehicles without KOS>. Then go to Step 3.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent malfunctions ).

STEP 3. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

Replace the engine-ECU.
Check end.