Copy GM BCM 13589056 Using OBDSTAR DC706 Tool

This guide demonstrates how to clone a Vauxhall/Opel GM BCM (Body Control Module) with part number 13589056 using OBDSTAR DC706, including immobilizer data transfer and PIN code extraction. This process is essential when replacing a faulty BCM while retaining original vehicle security data.

Tools Required

• OBDStar DC706 (or X300 Classic G3)
• P004 adapter
• 12V power supply (for bench testing)
• Replacement BCM (same part number)

Step 1: Prepare the BCMs

Identify Modules:

• Locate the original (donor) BCM and the new replacement BCM (ensure part numbers match).
• Verify both are Continental-branded modules (common for GM/Opel).

Pinout Setup:

Select GM BCM Continental 70F3469 +95160 option.

• Refer to the wiring diagram for correct connections:
• Pin 1: Ground (GND)
• Pins 4 & 5: 12V Power
• Pins 23 & 24: CAN Low/ CAN High

Step 2: Read Data from the Original BCM

Power Up:

• Connect the original BCM to the OBDStar DC706 tool using the wiring harness.
• Apply 12V power to Pins 4/5 and ground to Pin 1.

Extract Data:

• Open the OBDStar software, navigate to GM > Body Control.
• Select "Read EEPROM" and save eeprom data.
• Select "Read Flash" to back up the flash data.
• Retrieve the PIN code (e.g., 0427 in this case) and note it down.

Step 3: Write Data to the New BCM

Switch Modules:

• Disconnect the original BCM and connect the new BCM using the same wiring.

Transfer Data:

• In OBDStar, select "Write EEPROM" and load the saved backup file.
• Select "Write Flash" to transfer the firmware.
• Note: Skip backup for brand-new modules (no existing data to preserve).

Verify PIN Code:

• Read the PIN code from the new BCM to confirm it matches the original

Step 4: Final Checks

• Disconnect all wiring and power.
• Test the cloned BCM in the vehicle:
• Ensure the immobilizer recognizes the keys.
• Check for fault codes (clear if necessary).

Done.

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