Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Normal Operation And Fault Conditions
When the engine is running, the ABS module provides the ground circuit for the HydroMax pump motor relay coil. The ABS module continually monitors the HydroMax pump motor relay coil circuit and sets a DTC if the relay is stuck open or there is a circuit failure on the HydroMax pump motor relay coil circuit.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C1054:13 | Hydraulic Brake Booster R Line Fault: Circuit Open | With the ignition ON and system voltage between 9 and 16 volts, the ABS module detects voltage on the HydroMax pump monitoring circuit, indicating an open circuit on the HydroMax pump motor relay coil circuit. |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.