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Key Device for Fiat – Transponder Preparation & Key Learning Tool

This advanced Fiat key programming device is designed for fast, accurate transponder preparation and key learning through the OBDII port. It supports a wide range of Fiat vehicles and related models, offering a reliable solution for locksmiths and automotive technicians.

1. Transponder Preparation

Configure 0 keys using DIP switches 1–4:

DIP 1–4:
• OFF, OFF, OFF, OFF

Transponder/Remote Configuration (DIP 7–8):
• OFF, OFF – PCF7936 (no remote control)
• ON, OFF – PCF7946 + 10/16-pin SM
• OFF, ON – PCF7946 + 8-pin SMD

Place the transponder perpendicular to the antenna ring for proper reading.

Procedure:

Plug the device into the OBDII port.
Wait for initialization (green LED flashes 3 times).
The programming process takes only a few seconds.
Successful preparation: slow green LED flashing.
Failure: fast red LED flashing.

2. Key Learning Procedure

Set the number of keys to be learned using DIP switches 1–4:

Number of Keys	DIP 1–4
0	OFF, OFF, OFF, OFF
1	ON, OFF, OFF, OFF
2	OFF, ON, OFF, OFF
3	ON, ON, OFF, OFF
4	OFF, OFF, ON, OFF
5	ON, OFF, ON, OFF
6	OFF, ON, ON, OFF
7	ON, ON, ON, OFF
8	OFF, OFF, OFF, ON

Steps:

Plug the device into the OBDII port.
Wait for initialization (3 green flashes).
LED remains off for 5 seconds.
LED turns red for 10 seconds – turn the ignition ON with each new key.

Key Result Indicators:

Green LED for 5 seconds: key successfully programmed
Slow red LED for 5 seconds: key not accepted – repeat the process

⚠ Important: The procedure is only saved when all keys are successfully accepted.
At the end, the LED flashes slowly in green (unless transponder preparation failed).