Here is the tip for repairing these encrypted Renesas R7F7010643 Ford airbags using CG100X programmer.
Model example:
Ford Focus 2023
Restraint control module Part number: RJ7T 14B3 21 AB
Processor: Renesas R7F7010643 encrypted
Step 1: Diagnose airbag module with CG70 airbag reset tool
First we read the SRS fault code with CG70 airbag reset tool or a diagnostic scanner.
Run CG70 software, go to Ford and select the corresponding part number. It will show you the wiring diagram.
Read fault code. If you get a code B1193 Crash event storage full and locked, this means the vehicle was in an accident and it has crash data stored in the ACM/SDM airbag control module. This code will not clear and won’t erase with any diagnostic scan tool. It will give you the error “cannot execute routine”.
Step 2: Repair airbag with CG100X
The processor is encrypted, it cannot be handled with cg70, you need cg100x.
CG100X will decrypt and read data of this mcu.
Run CG100X software, select Ford and search part number. It will show you the wiring diagram.
Require the removal of 1 capacitor on the main board.
Also required to use D1 adapter, 2mm thin cable and a 5.10 resistor.
The capacitor is tiny. Be careful when desoldering the capacity.
Do not let the 5.10 resistor touch the board, as this may cause a short circuit or a lack of communication.
After setting up the connection, start to decrypt chip.
Then read chip (Dflash and Pflash) and save data.
Erase airbag crash successfully. The srs module is repaired.
Disconnect wires with cg100x. Don't forget to solder the capacitor to the airbag main board.
Step 3: Read fault code with cg70
Connect airbag with cg70 again. Read fault code and make sure there is no crash fault code stored.
