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Eric, Automotive Repair Shop Manager
Category: Mercedes
Satisfied Customers: 29730
Experience:  20+ yrs. experience as repair shop manager and technician.
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What is the minimum amperage / voltage to keep the ECU from

Customer Question

What is the minimum amperage / voltage to keep the ECU from shutting down the car into get you home mode please.
JA: An old Jeep Grand Cherokee.
Customer: You clearly did not read my question.
JA: Sometimes things that you think will be really complicated end up being easy to fix with Mercedes. The Mercedes Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so he can help you best.
Customer: I need a volts and amps answer please.
JA: Are you hoping to fix this yourself?
Customer: No it a question about swapping power supplies so that during the procedure the car does not go into shutdown
JA: OK! The Mercedes Mechanic will help you with the diagnostics so you are sure to get this fixed right. Is there anything else the Mercedes Mechanic should be aware of about your Mercedes?
Customer: Diagnostics unnecessary just need the stats please
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Mercedes Mechanic about your situation and then connect you two.
Submitted: 4 months ago.
Category: Mercedes
Expert:  Eric replied 4 months ago.


A minimum of 10.5V is needed to supply the ECU to keep it operating.

Expert:  Eric replied 4 months ago.

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