Brake System Pump Motor Circuit Open
Indicates an open circuit in the brake system pump motor.
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)
The brake system isn't working properly because the pump that helps with braking is not getting power. This could be due to a broken wire or a bad connector.
What the computer is actually seeing
The system detects no voltage or insufficient voltage at the brake pump motor circuit, which is expected to receive battery voltage (around 12V-14V) when activated.
What a healthy reading looks like
Brake pump motor should show battery voltage (12V-14V) during diagnostic checks when the system is activated.
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. Check the fuse for the brake pump motor. Replace if blown, and retest.
- 22. Inspect the wiring harness and connectors for damage or corrosion. Repair or replace as needed, then retest.
- 33. Measure voltage at the brake pump motor plug. It should read 12V-14V when the system requests pump operation.
- 44. If voltage is absent, trace the circuit back to the brake control module for further faults or wiring issues.
- 55. If good voltage is present but the pump is not activating, replace the brake system pump motor.
Common causes
- Broken or frayed wire in the pump circuit
- Bad connector or corroded terminals
- Faulty brake system pump motor
- Blown fuse for brake pump motor
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s not safe to drive; the brake system may fail, increasing stopping distance.
Will this come back after I fix it?
If you repair the wiring and connectors properly, it shouldn't come back.
Why is this paired with other codes?
These codes can indicate multi-fault issues in the brake system's electrical circuit.
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