Immobilizer System Description

Immobilizer System: System Description

Input/Output Signal Chart

BCM






System Description

Immobilizer system has the following immobilizer functions:

- Engine immobilizer shows high anti-theft performance to prevent engine from starting by other than the owner.
- Only a key with key ID registered in BCM and ECM can start engine, and shows high anti-theft performance to prevent key from being copied or stolen.
- Therefore, immobilizer system warns outsiders that the vehicle is equipped with the anti-theft system. Refer to [Vehicle Security System: System Description] Vehicle Security System Description.
- If system detects malfunction, security indicator illuminates when ignition switch is turned to ON position.
- If the owner requires, ignition key ID or mechanical key ID can be registered for up to 5 keys.
- During trouble diagnosis or when the following parts have been replaced, and if ignition key is added, registration*1 is required.
*1: All keys kept by the owner of the vehicle should be registered with mechanical key.

- ECM
- BCM
- Ignition key
- Remote keyless entry receiver

- Immobilizer system trouble diagnosis, system initialization and additional registration of other mechanical key IDs must be carried out using SDT.
When immobilizer system initialization has been completed, the ID of the inserted mechanical key or mechanical key IDs can be carried out.
- Possible symptom of immobilizer system malfunction is "Engine cannot start". Identify the possible causes according to "Work Flow", Refer to [Diagnosis and Repair Workflow] Diagnosis and Repair Workflow.
- If ECM other than Genuine SUZUKI is installed, the engine cannot be started. For ECM replacement procedure, refer to [ECM Re-Communicating Function: Description] Description.

Precautions for Key Registration

- The key registration is a procedure that erases the current immobilizer system ID once, and then re-registers a new ID. Therefore the registered key is necessary for this procedure. Before starting the registration operation collect all registered Keys from the customer.
- The immobilizer system ID registration is the procedure that registers the ID stored into the transponder (integrated in mechanical key) to BCM.
The key ID registration is the procedure that registers the ID to the BCM.
- When performing the key system registration only, the engine cannot be started by inserting the key into the key cylinder. When performing the immobilizer system registration only, the engine cannot be started by using the ignition key.

Security Indicator

- Always flashes with ignition key in the OFF position.

Maintenance Information

CAUTION:

It is necessary to perform immobilizer system ID registration when replacing any of the following part.

If it's not (or fail to do so), the electrical system may not operate properly.

- BCM
- ECM
- IPDM E/R
- Ignition key
- Immobilizer system antenna amp.
- Combination meter