How to Reset Short Circuit Protection on BMW Lighting Modules Using Toolset32

How to Reset Short Circuit Protection on BMW Lighting Modules Using Toolset32

To reset short circuit protection for BMW lights with Toolset32, follow these steps:

Initial Setup

1. Connect the diagnostic cable to your car’s OBD-II port.
2. Launch Toolset32 on your laptop.
3. Load the FRM Module Program:
   • For FRM2 modules, load the file FRM70.prg.

Step 1: Check Short Circuit Counter

1. In the Select Job field, choose status_lampen_kurzschluss_counter.
2. Identify the Lamp with Short Circuit Protection Activated:
   • In the Results list, select job_status and locate the specific lamp output that is disabled due to short circuit protection.
   • Send the Job using the F5 key to check the counter.
   • The COUNTER value should be greater than 0 if a short circuit is detected for that lamp. If COUNTER = 0, you may need to try different lamp outputs until you identify the correct one(s) with COUNTER > 0.

Step 2: Reset Short Circuit Protection

1. Switch the Job to steuern_reset_kurzschlussabschaltung (reset short circuit shutdown).

2. Set the Lamp Number (lamp_nr):

   • lamp_nr requires a numeric value between 0 and 255 to specify which lamp to reset.
   • Enter the desired lamp_nr in the Arguments field.
   • Select job_status in the Results field.

3. Send the Reset Job:

   • Press F5 to send the command. Look for an "OKAY" response in the Results window to confirm success.

4. Tip: Since mapping between lamp_nr and specific lamps isn’t provided, try sending the command for all numbers from 0 to 63. Toolset32 will interpret any invalid values automatically.

Step 3: Verify Reset

1. Repeat Step 1:
   • Run status_lampen_kurzschluss_counter again to verify that all COUNTER values are now set to 0, indicating successful reset of the short circuit protection.

Alternative Process with EDIABAS ToolSet32 for FRM3

1. Load EDIABAS Toolset32 and go to File > Load SGBD.

2. Select frm_87.prg from your SP_Daten directory.

3. Find and select reset_kurzschluss_sperre in the available jobs list.

4. Run the Reset Command on lamp IDs 0-63. (Running it slightly over the range should be harmless, as reverse lights typically fall within this circuit ID range.)

5. Finished: After running this reset, check that short circuit counters are cleared.

Note: This guide provides a systematic approach to resetting BMW lighting modules. If uncertain, consult a BMW technician or expert to avoid unintended issues.