X74Ph2_Card.pdf

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X74Ph2 Hands-Free Card Renew
For Renault ECU Tool interface
Short User Manual
April 2021
crc@immo-tools.lt
Software and further user manual applies to silver colour 3 button card with Hands-Free
used in Laguna II Ph2 (X74) / Espace IV (X81).
NOTE: Procedure described below produces 100% correctly prepared card. Please look for
programming faults in the process of reset-to-virgin if card is rejected during learning to car
and if RF remote or Hands-Free does not work. Also please check PCB for a physical damage.
crc@immo-tools.lt
•
Open the card by cutting edge of plastic casing carefully.
Card consist of two separate units – transponder
PCF7936
and PCB with RF remote control
and Hands-Free (HF) circuitry with MCU and
EEPROM 25AA040
•
To erase programmed values from card you need
EEPROM
programmer for
25040
and
Hitag2
programmer for
PCF7936.
Use
EEPROM programmer
with in-circuit programming capability. Solder wires to PCB
according pin numbering in the picture. Wire colors in the picture matches Carprog A4
cable, but any other programmer will be good here – just follow EEPROM pin numbers.
We intentionally did not specified connection point for pin 8 – power supply to EEPROM.
Most of EEPROM programmers provide +5V to pin 8, but this voltage is too high for PCB
that is normaly supplied from +3V and can cause damage.
•
NOTE: To maintain power supply to EEPROM please attach 3V button cell battery to the
card during EEPROM R/W!
•
•
Read EEPROM and save to file
Connect Renault ECU Tool interface to PC, run software and select <HANDS-FREE
CARD
RENEWAL FOR LAGUNA II PH2 / ESPACE IV>.
Click button <Load
EEPROM Dump>
to
load EEPROM file to the software. File size must be 512 bytes.
crc@immo-tools.lt
•
Press button <Reset
Card Data>
- dilalog STEP#1 will pop-up:
Select <Card
contain original PCF7936>
if original PCF7936 is available.
Select <PCF7936
is lost>
if original transponder is missing and you are going to replace it
with new blank PCF7936. If this is a case, please read ID of replacement transponder using
Hitag2 programmer and enter it to yellow fields before to proceed to the next step.
•
Press <OK> button. Next dialog will pop-up:
•
•
Save VIRGIN EEPROM dump to file. Later you must to program it back to card
Save PCF7936 data to text file. Data that you see in current dialog will be saved
crc@immo-tools.lt
•
Run Hitag2 programmer and enter ISK for transponder unlock. Set factory ISK for blank
replacement transponder when original transponder is lost:
Use ISK, extracted from EEPROM if original transponder is available:
crc@immo-tools.lt

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