Toyota 89170-04741

[Adamon777]

hi, here failed clear crash R7F701330

[AST_Support]

You have an internal electronic failure and it has blocked the crash clearing.

[xsmart]

those are the error codes we get from the car!

[AST_Support]

It seems that the crash data has disappeared.
You need to calibrate the OSC.

[Adamon777]

I have several colleagues who have dealt with these kinds of modules. And the interesting part is that whenever there is a crash, this internal fault always appears — and it’s at the hardware level. I believe that if it were truly a hardware issue, the module wouldn’t communicate at all. Are you sure this is what the problem is?
Example another srs module, see attached 8ec27c13-d922-475b-b873-8a8a198e471a.jpg 8ec27c13-d922-475b-b873-8a8a198e471a.jpg 3570a1c5-9b9a-45a7-954c-8df9fb2009d3.jpg 35cb8f89-464a-49da-a332-df926446cd26.jpg

[AST_Support]

In most cases, there are no internal errors and Clear Crash works well.

Read Part Number... 89170-04740
Read SW Number... 8917F04130
Read Errors...
P05BB:00-A8 - (history) !!! CRASH EVENT STORAGE FULL AND LOCKED !!!
B0001:13-AB - DRIVER FRONTAL STAGE 1 DEPLOYMENT CONTROL (Circuit Open)
B0002:13-AB - DRIVER FRONTAL STAGE 2 DEPLOYMENT CONTROL (Circuit Open)
B0010:13-AB - PASSENGER FRONTAL STAGE 1 DEPLOYMENT CONTROL (Circuit Open)
B0011:13-AB - PASSENGER FRONTAL STAGE 2 DEPLOYMENT CONTROL (Circuit Open)
B0020:13-AB - LEFT SIDE AIRBAG DEPLOYMENT CONTROL (Circuit Open)
B0021:11-A8 - (history) LEFT CURTAIN DEPLOYMENT CONTROL 1 (Circuit Short To Ground)
B0021:13-AB - LEFT CURTAIN DEPLOYMENT CONTROL 1 (Circuit Open)
B0052:13-AB - PASSENGER SEATBELT SENSOR (Circuit Open)
B0050:13-AB - DRIVER SEATBELT SENSOR (Circuit Open)
B0070:13-AB - DRIVER SEATBELT PRETENSIONER DEPLOYMENT CONTROL (Circuit Open)
B0073:13-AB - SECOND ROW LEFT SEATBELT PRETENSIONER DEPLOYMENT CONTROL (Circuit Open)
B009B:87-AB - LEFT SIDE RESTRAINTS SENSOR 5 (Missing messages)
B00C0:87-AB - PASSENGER SEAT OCCUPANT CLASSIFICATION SENSOR „A“ (Missing messages)
B00C2:87-AB - PASSENGER SEAT OCCUPANT CLASSIFICATION SENSOR „C“ (Missing messages)
B00B5:13-AB - DRIVER SEAT TRACK POSITION RESTRAINTS SENSOR (Circuit Open)
B00D2:14-AB - RESTRAINT SYSTEM MALFUNCTION INDICATOR 1 (Circuit Short To Ground or Open)
B00D5:14-AB - RESTRAINT SYSTEM PASSENGER DISABLE INDICATOR (Circuit Short To Ground or Open)
U023A:87-AB - LOST COMMUNICATION WITH FRONT CAMERA MODULE (Missing messages)

Set ServiceMode... ok
Clear Crash... ok

You need to read the MCU and post your data. Maybe we can clean this by dump.

[Adamon777]

do you have pinout or link how to read this kind MCU?

[AST_Support]

Yes, but if you've never read the locked R7F701330, it's going to be difficult.

[Adamon777]

I constantly work with locked modules and read them in-circuit - - Subaru AN, SL, Ford, where you need to desolder capacitors, etc. But I cannot find the wiring diagram for this board.
Can you send link or picture PM.

[AST_Support]

Take high-quality photos of the PCB from both sides.

[Adamon777]

See attached here please PCB
IMG_6493.jpg IMG_6492.jpg

[AST_Support]

First, read and post data from the 95256 EEPROM.

[Adamon777]

Show location please

[AST_Support]

The SOIC8 5H25A chip is in the first photo.

[Adamon777]

eeprom here