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Electrical, battery connected; no start after tapping alternator with screwdriver.(spark created)

204 Views 6 Replies 3 Participants Last post by  J. Soto F22
Hi, new to the forum, avid DIY.
Replaced mechanical water pump and heat management module about 30 days ago after a coolant leak was found. about a week later the car showed a fault code heat management module open outside tolerance, so I decided to replace the coolant temperature sensor. After removing the intake plenum and replacing the part I decided to clean some residual carbon from the valves, while doing that I accidentally tap the lead terminal from the alternator with a small screwdriver grounding the terminal thus creating a spark, short circuit. (this is totally my fault for not disconnecting the battery before performing the work) I knew there and then that damage was done.
After putting everything together, I tried to start the car to no avail, I have power and all dash lights come on, I physically, test probe, checked all the fuses in the trunk, engine bay, and FEM near the footwell, all fuses are good. I check for power in the following locations, starter motor lead has power, DME has power. I scan the car and a mirid of codes are present. (see list) Could it be the IBS, the starter relay, park relay, or did I burn the DME? The car is showing ABS/chassis stabilization/drivetrain malfunction. Any suggestions, troubleshooting direction?
Thanks Jose.

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Disconnect battery for 10 mins, then reconnect. Clear all fault codes, then try starting again.
Disconnect battery for 10 mins, then reconnect. Clear all fault codes, then try starting again.
Thanks for your response, I had the battery disconnected overnight while charging the battery, both terminals disconnected. I tried again this morning and no crank. If anyone knows the location for the starter relay control module please let me know.
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What year and what engine do you have?
2017 F22 230i B46 coupe.
If you have enet cable i try can help you. I think that you need start flexray line.

Send me a pm in telegram. Mi username is juantg93.

Enviado desde mi SM-G988B mediante Tapatalk
If you have enet cable i try can help you. I think that you need start flexray line.

Send me a pm in telegram. Mi username is juantg93.

Enviado desde mi SM-G988B mediante Tapatalk
Hi, thanks for your response, I will pm you very soon. Thanks
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