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Immobilizer System Check

1. Turn the vehicle to the ON mode.

2. Connect the HDS to the data link connector (DLC) .

3. Monitor the SYSTEM CHECK in IMMOBILIZER INFO with the HDS.

NOTE:  If the HDS does not communicate with the immobilizer-keyless control unit, check the power, ground, and K-line connections.

4. If the HDS displays NORMAL N-1, the immobilizer system is OK at this time. If the HDS displays any messages, check as follows:

System Check No. System Check Possible Cause
A-1 The key is not registered(Incorrect key code)
  • This key is not registered in the immobilizer-keyless control unit. Try to register keys using the HDS.
  • No communication between the antenna and the immobilizer key because of interference from metal such as key chains/key rings/other keys.
  • Low battery voltage.
A-2 Communication error between the key and immobilizer-keyless control unit(Incorrect key code format)
  • Intermittent interruption between transponder and immobilizer-keyless control unit.
  • The immobilizer key type is different. It is not for this vehicle but for another vehicle or for another company's vehicle.
  • Key failure (transponder failure)
  • No communication between the antenna and the immobilizer key because of interference from metal such as key chains/key rings/other keys.
  • Low battery voltage.
A-3 No communication between the key and immobilizer-keyless control unit(No transponder detected)
  • The vehicle was turned to the ON mode with a non-immobilizer key.
  • The immobilizer key type is different. It is not for this vehicle but for another vehicle or for another company's vehicle.
  • Key failure (transponder failure)
  • No communication between the antenna and the immobilizer key because of interference from metal such as key chains/key rings/other keys.
  • Low battery voltage.
  • Immobilizer-keyless control unit failure
B-1 The PCM is not registered
  • The PCM was not registered. Try to register the PCM using the HDS.
  • No communication between the PCM and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the immobilizer-keyless control unit and the PCM because of electrical interference.
  • Open in the IG1 line
B-2 Error of communication format in PCM(Incorrect registration format)
  • The PCM was not registered. Try to register the PCM using the HDS.
  • No communication between the PCM and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the immobilizer-keyless control unit and the PCM because of electrical interference.
System Check No. System Check Possible Cause
C-1 Imoes unit is not registered
  • Imoes unit was not registered.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of interference.
  • Try to register the imoes unit with the HDS.
C-2 Error of communication format in imoes unit
  • Imoes unit was not registered.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of electrical interference.
  • Try to register the imoes unit with the HDS.
D-1 S-NET line short
  • S-NET line short from the PCM to the imoes unit or the immobilizer-keyless control unit.
  • No communication between the PCM and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the immobilizer-keyless control unit and the PCM because of electrical interference.
  • Immobilizer-keyless control unit failure
  • PCM failure
D-2 No communication between imoes unit and immobilizer-keyless control unit(S-NET line)
  • Blown fuse
  • S-NET line open from the imoes unit to the immobilizer-keyless control unit.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the imoes unit and the immobilizer-keyless control unit because of electrical interference.
  • Immobilizer-keyless control unit failure
  • Imoes unit failure
D-3 No communication between PCM and immobilizer-keyless control unit(S-NET line)
  • Blown fuse
  • S-NET line open from the PCM to the immobilizer-keyless control unit.
  • No communication between the PCM and the immobilizer-keyless control unit because of low battery voltage.
  • No communication between the immobilizer-keyless control unit and the PCM because of electrical interference.
  • Immobilizer-keyless control unit failure
  • PCM failure
E-1 Initial registration of immobilizer-keyless control unit is not completed The immobilizer-keyless control unit is not registered. Try to register the immobilizer-keyless control unit using the HDS.
E-2
E-3
E-4
E-5
System Check No. System Check Possible Cause
F-1 Special Mode The vehicle is turned to the ON mode and to the OFF (LOCK) mode with the registered key.
F-2
F-3
F-4
F-5
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