OBDSTAR P50 Toyota Encrypted Airbag Crash Data Reset Guide

The OBDSTAR P50 supports crash data reset for Toyota encrypted airbag modules. In this example, we will demonstrate how to clear crash records from a Toyota Airbag ECU equipped with the CYT2B93BAC chip using bench mode.

Required Tools

Before starting, prepare the following equipment:

OBDSTAR P50

High-Power DC Power Supply

Main Cable

Jumper Wires

P004 Adapter

C4-06 Adapter Kit

Toyota Airbag ECU (CYT2B93BAC Chip)

Step 1: Enter Crash Reset Function

Power on the OBDSTAR P50 and ensure the software has been updated to the latest version.

Navigate to: AIRBAG RESET → SRS

Use the search function in the upper-right corner to locate the target airbag ECU model.

Step 2: Select Connection Method

Tap Start.

Choose: BENCH → P004 → OK

You can tap:

Guide to view menu descriptions, operation instructions, and adapter information.

Connector Pinout to view the wiring diagram.

Please note that this ECU supports multiple wiring methods. Refer to the corresponding wiring diagram and perform the required operation accordingly.

Tap OK to continue.

Connect all cables according to the wiring diagram provided by the device.

Step 3: Check ECU Status

After completing the wiring connection:

1. Tap ECU Info

2. Tap Read DTC

The device will detect the fault codes stored in the airbag module and indicate that crash data is present.

Next, tap Erase DTC.

At this stage, the operation will fail because the crash record still exists in the ECU.

Step 4: Clear Crash Data

Tap Erase Crash.

Press START to begin the procedure.

The OBDSTAR P50 will process the airbag module and display a message indicating that the crash data has been successfully cleared.

Follow the on-screen instructions:

1. Turn the ignition OFF.

2. Wait approximately 30 seconds.

3. Turn the ignition ON again.

Step 5: Clear and Verify DTCs

After the crash data has been removed:

1. Tap Erase DTC

2. Confirm that the device displays Erase DTC Success

3. Tap Read DTC again

Verify that all DTCs have been successfully cleared and no crash records remain in the airbag ECU.

Video Tutorial

For a complete step-by-step demonstration, please watch the video guide:

Conclusion

Using the OBDSTAR P50, technicians can efficiently perform a crash data reset on Toyota encrypted airbag modules equipped with the CYT2B93BAC chip. By following the correct bench connection method and using the P004 adapter, crash records can be cleared successfully, allowing DTCs to be erased and the airbag ECU to return to normal operating status.

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FAW R7F7010643 Airbag ECU Repair Guide with OBDSTAR P50

This guide walks you through the complete process of repairing and clearing crash data from the encrypted FAW airbag control module with part number R7F7010643. The procedure uses the OBDSTAR P50 along with the MP001 and RH850/V850 adapter kits.

What You Will Need:

OBDSTAR P50 (or KeyMaster G3)

High-power DC regulated power supply

Main cable

Jumper wires

MP001 Multifunctional Programmer

RH850/V850 Adapter Kit

FAW R7F7010643 Airbag ECU

Step 1 — Update Software and Enter Crash Reset Menu

Before starting, ensure that the OBDSTAR P50 software is fully updated.

Navigate to:

[Crash Reset] → [AIRBAG RESET]

Use the search icon (top-right) to quickly locate the correct airbag control module number.

Step 2 — Select Boot Mode and Check Wiring Guide

Tap Start, then choose Boot Mode and the correct adapter (MP001).

This function requires an online server connection—make sure your internet is stable.

Tap [Guide] to view detailed information about the function background, menu descriptions, operation introduction, notes, and connection methods.

Next, open [Connector Pinout] and follow the wiring diagram to make the proper cable connections.

Step 3 — Read ECU Info and DTCs

Click [ECU Info] to confirm the airbag ECU part number.

Then select [Read DTC] to check the fault codes.

A crash event will be detected.

Attempting to erase DTC will fail because crash data is stored.

Step 4 — Read All Data (Crash Records)

Since crash data cannot be cleared directly, you must first read all module data.

Go to: [Erase Crash (MP001)] → [Read All Data (R7F7010643)]

Select the PCB wiring diagram and disconnect the power before changing the adapter.

Replace the MP001 with the RH850/V850 Adapter.

Open the airbag module casing and solder the wires according to the PCB diagram.

Tap [Read All Data (R7F7010643)] → [Start]

Wait for communication to complete, then save the backup file.

Operation successful.

Step 5 — Erase Crash Data

Choose [Erase Crash], then follow the prompts to select the correct data file.

The tool will erase crash information from the file.

Crash record cleared successfully.

Step 6 — Reassemble and Clear DTCs

Reconnect everything and switch the device back to Diagnostic Mode.

Select [Erase DTC] again.

This time, the DTC clears successfully.

A final [Read DTC] confirms that the previous crash record is gone.

Full video tutorial:

For more tools and guides, visit:

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Resetting SGMW R7F701A033 Airbag ECU with OBDSTAR P50

This article provides a step-by-step guide on how to reset the crash data for an SGMW R7F701A033 encrypted Airbag ECU using OBDSTAR P50. This procedure is necessary when standard diagnostic tools cannot clear crash-related fault codes.

Required Tools & Equipment

P50 or Keymaster G3

High-power DC regulated power supply

MP001 multi-function programmer

RH850/V850 adapter kit

Main cable and jumper

SGMW R7F701A033 airbag module

Pre-Operation Preparation

1. Software Upgrade: Ensure your diagnostic tool's software is updated to the latest version.

2. Navigation: From the main menu, select [Crash Reset] and then [AIRBAG RESET].

3. Model Selection: You can quickly locate the correct option by searching for the airbag ECU part number in the upper-right corner search bar.

4. Initial Setup: Select the correct Boot Mode and the corresponding RH850 adapter.

Critical Preliminary Step: Review the Guide

Before any physical work, carefully review the built-in instructions.

Tap the [Guide] button.

Thoroughly read all sections: Background, Menu Description, Operation Description, Notes, and Connection Method.

This information is crucial for a successful and safe reset.

Hardware Connection & Wiring

1. Click [Connector Pinout].

2. Important: This specific ECU has multiple wiring methods. You must follow the pinout diagram that matches the function you are performing.

3. Connect the wires from your programmer to the ECU's circuit board precisely as shown in the diagram.

Step-by-Step Reset Procedure

Phase 1: Initial Diagnostics & Preparation

1. ECU Information: Click [ECU Info] to read and verify the ECU's part number.

2. Check for DTCs: Select [Read DTC]. You will see a persistent crash-related fault code.

3. Attempt Erasure: Choose [Erase DTC]. This will fail, confirming the need for a physical reset.

Phase 2: Physical Access & Data Backup

1. Initiate Crash Erase: Select the [Erase Crash (MP001)] function.

2. Power Down: Tap [PCB Pinout] to view the diagram, then disconnect power to the ECU.

3. Disassemble: Remove the cover of the airbag ECU to access the main printed circuit board (PCB).

4. Adapter & Wiring: Replace the standard adapter with the RH850 adapter. Solder the wires to the ECU's PCB as shown in the diagram.

5. Read All Data: Tap [Read All Data (R7F701A033)] and then [START].

6. Connect Programmer: Connect the MP001 programmer to the diagnostic device. An "Upgrade successful" message will appear.

7. Acknowledge Risk: A warning will appear: "Continuing with the risk of locking the MCU, do you want to continue?" Proceed with caution.

8. Create Backup: The tool will read the ECU's memory. It is critical to save the backup file when prompted. Wait for the "Operation success" message.

Phase 3: Erasing the Crash Record

1. Execute Erase: Click the [Erase Crash] button.

2. Confirmation Prompt: The device will ask, "Has the [Read All Data] function been executed?" Since you have already done this, select OK.

3. Select Backup File: When prompted, select the data file you saved in the previous step.

4. Completion: The process will complete with a "Crash record erased successfully" message.

Phase 4: Final Verification

1. Reconnect: Reconnect the device to the vehicle and switch the software back to standard diagnostic mode.

2. Clear DTCs: Select [Erase DTC] again. The DTCs will now be erased successfully.

3. Final Check: Perform a final [Read DTC] to confirm. The previous crash record and all related fault codes will be gone.

Conclusion

You have now successfully used the OBDSTAR P50 to reset the collision data for the SGMW R7F701A033 airbag ECU. Always ensure a full backup is performed before attempting any write operations to prevent permanent ECU damage.

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For more details, please refer to the video: