Electronic Brake Control Module - Power Relay Deactivation
This code indicates an issue with the power relay for the electronic brake control module.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside the brake control module, the power relay isn't working right, meaning the module can't get or stay powered, which can affect braking performance.
What the computer is actually seeing
The electronic brake control module (EBCM) detects that the relay responsible for supplying power to it has deactivated or is not responding when it should be active, typically monitored by voltage checks.
What a healthy reading looks like
The relay should show 12-14 volts while energized during brake system operation; if voltage is zero when it should be on, the relay or circuit is likely faulty.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors for the electronic brake control module and the power relay. Repair any damaged wires or poor connections. Decision: Are the connectors/wiring intact? Yes: Go to step 2. No: Repair wiring/connectors.
- 22. Check the battery voltage, ensuring it's between 12-14 volts. Decision: Is the battery voltage okay? Yes: Go to step 3. No: Charge/replace battery.
- 33. Test the power relay by swapping it with a known good relay of the same type. Decision: Does the code clear after swapping the relay? Yes: Relay was faulty, replace it. No: Go to step 4.
- 44. Check for any faults in the electronic brake control module by scanning for additional codes or data. Decision: Are there other codes present? Yes: Troubleshoot those additional faults. No: Consider replacing the EBCM.
Common causes
- Faulty electronic brake control module
- Defective power relay
- Wiring issues (shorts, opens, corrosion)
- Poor electrical connections
- Battery voltage issues
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not safe; braking performance may be compromised.
Will this code come back after clearing it?
If the underlying issue isn't fixed, yes, it will come back.
Why does this code pair with others?
Codes can be related due to shared components or systems; a fault in one can affect others.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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