No start - immobilizer out of order

VANCE CATTIN

MEMBER
2003 HYUNDAI TIBURON
2.0L
4 CYL
2WD
MANUAL
140,000 MILES

Hello, I am having a no start problem. Engine crank but will not start, the immobilizer light is flashing five time and disappears, vehicle book says "immobilizer out of order". I already tried to redo the connection at the ignition antenna no success I was wondering what is the next step now?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi and thanks for using 2CarPros. Com

According the fault code (5) there is an internal fault in the body control module. I attached a picture of the fault description. Also, here is the description:

The diagnosis monitors
- Communication between the ECM and the BCM
- Function of the BCM and the transponder, and
- Data (stored in the ECM) related to the immobilizer function.

REPLACEMENT OF ECM AND BCM
In case of a detective ECM, the unit has to be replaced with a "virgin" or neutral" ECM. All keys have to be programmed into the new ECM. Keys, which are not programmed into the ECM, are invalid for the new ECM (Refer to key teaching procedure). The vehicle specific data have to be left unchanged due to the unique programming of transponder.

In case of a defective 8CM, there is no special procedure required. A new 8CM simply replaces the old one. There are no transponder - related data stored in this device.

NEUTRALISING ECM
The ECM can be set to the "neutral" status by a tester.

There are four different faults that are assigned to the immobilizer system. Every fault is broken down into four different types (circuit malfunction, circuit range/performance problem, low input, high input). The following table shows the assignment of immobilizer related faults to each type

A valid ignition key is inserted and after ignition on is recorded, the ECM requests the vehicle specific data from the tester. The communication messages are described at "Neutral Mode" After successfully receiving the data, the ECM is neutralized.

The ECM remains locked. Neither the limp home mode nor the " twice ignition on" function, is accepted by the ECM.

The teaching of keys follows the procedure described for the virgin ECM. The vehicle specific data have to be unchanged due to the unique programming of the transponder. If data should be changed, new keys with a virgin transponder are requested.

As always, I would first check the wiring at the BCM to make sure nothing is corroded or damaged.

Let me know if you have other questions.

Joe

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