System Description
System Description'00-05 models
The vehicle is equipped with type II immobilizer system that will disable the vehicle unless the proper ignition key is used. This system consists of a transponder located in the ignition key, an immobilizer receiver unit, an indicator, and the ECM.
The vehicle has two kinds of keys.
- The black master key for:
- Ignition switch.
- Door locks. -Trunk lock.
- Center console lock
- The gray valet key for:
- Ignition switch.
- Door locks.
When the immobilizer key is inserted into the ignition switch and turned to the ON (II) position, the immobilizer receiver unit sends power to the transponder in the ignition key. The transponder then sends a coded signal back through the immobilizer receiver unit to the ECM.
- The immobilizer system can store up to six key codes.
- If it is necessary to rewrite the ECM, the dealer needs the customer's vehicle, all its master keys and valet keys, and the HDS equipped with the latest version of HDS software. Any key that is not learned during rewriting will no longer start the engine, except T5 keys duplicated with the IIco Code Key Duplicator.
- It is possible to add ONE new key without reprogramming all of the keys (follow the prompts in the HDS IMMOBI menu).
- If the proper key has been used, the immobilizer indicator will come on for about 2 seconds, then go off. When the ignition switch is turned OFF, the indicator will blink for about 5 seconds to signal that the immobilizer system has been set correctly, then the indicator will go off.
- If the wrong key has been used or the code was not received or recognized by the ECM, the indicator will come on for about 2 seconds, then it will blink until the ignition switch is turned OFF. For accurate immobilizer system diagnosis, get as much information from the customer as possible. A blinking indicator means the key was not recognized.
NOTE: Large metal objects, key fobs, other immobilizer keys, and other transponders can interfere with the immobilizer signal. If an intermittent problem is suspected, remove the ignition key from the key ring.
'06-08 models
The vehicle is equipped with a type IV immobilizer system that will disable the vehicle unless a programmed ignition key is used
This system consists of a transponder located in the ignition key, an immobilizer control unit-receiver, an indicator, the Imoes unit ('08 model), and the ECM.
'06-07 models
When the immobilizer key is inserted into the ignition switch and turned to the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The transponder then sends a coded signal back through the immobilizer control unit-receiver to the ECM. The code is a rolling type embedded in the receiver instead of the ECM. A handshake with the HDS is required at ECM repair and replacement, and all keys are required at control unit-receiver repair and replacement.
'08 model
When the immobilizer key is inserted into the ignition switch and turned to the ON (II) position, the immobilizer control unit-receiver sends power to the transponder in the ignition key. The transponder then sends a coded signal back to the immobilizer control unit-receiver which sends a coded signal to the imoes unit, which confirms the code and signals the ECM to supply power to the fuel pump circuit.
A communication agreement with the HDS is required if the ECM or the imoes unit is replaced. When replacing the immobilizer control unit-receiver, all keys are required to be registered in to the new control unit-receiver with the HDS. Any keys that were not registered in the control unit-receiver will not start the vehicle.
- If a programmed key has been used, the immobilizer indicator will come on for about 2 seconds, then go off. When the ignition switch is turned OFF, the indicator will blink for about 5 seconds to signal that the unit has been set correctly, then the indicator will go off.
- If the wrong key has been used whose code was not received or recognized by the system, the indicator will come on for about 2 seconds, then it will blink until the ignition switch is turned OFF.
