C1785 on Jaguar
EPB Motor Output Open Circuit
C1785 on Jaguar vehicles indicates epb motor output open circuit. Au7o has documented this code across 1 Jaguar model — most commonly on XK. The Electronic Parking Brake (EPB) module drives the parking brake actuator motor and monitors current flow on its output. C1785 sets when the module commands the motor to run but sees an open circuit on the motor output — no current path — so the actuator cannot be driven. Jaguar documentation notes this fault can only be detected while the EPB motor is running, i.e. during an apply or release cycle. Typical repair costs on Jaguar range from $500 to $1,300, depending on the specific model and root cause.
Common Causes of C1785
- •Open or broken EPB motor output wiring between module and actuator (common at the rear harness / underbody routing)
- •Corroded or water-intruded EPB actuator connector
- •Failed EPB actuator motor (open windings or worn brushes)
- •Failed EPB control module output driver
- •Blown EPB motor fuse
C1785 on Jaguar by Model
Jaguar XK(1 issue)
- Electronic Parking Brake (EPB) Motor / Module Failure2007-2015
The X150 electronic parking brake is a frequent trouble spot. Small plastic serrated gears inside the EPB motor unit strip, the wiring harness between the parking brake module (PBM) and actuator chafes, and the module/switch can fault. Failures range from a 'Park Brake Fault' warning to the brake staying stuck ON so the car cannot be moved. The plastic gears are not sold separately, so a full motor assembly is usually required.
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View C1785 across all makes →Frequently Asked Questions
What does C1785 mean on Jaguar?▼
C1785 stands for "EPB Motor Output Open Circuit." The Electronic Parking Brake (EPB) module drives the parking brake actuator motor and monitors current flow on its output. C1785 sets when the module commands the motor to run but sees an open circuit on the motor output — no current path — so the actuator cannot be driven. Jaguar documentation notes this fault can only be detected while the EPB motor is running, i.e. during an apply or release cycle. On Jaguar specifically, this code is documented across 1 model.
What causes C1785 on Jaguar vehicles?▼
Common causes on Jaguar: Open or broken EPB motor output wiring between module and actuator (common at the rear harness / underbody routing), Corroded or water-intruded EPB actuator connector, Failed EPB actuator motor (open windings or worn brushes), Failed EPB control module output driver, Blown EPB motor fuse. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C1785 on a Jaguar?▼
Repair costs on Jaguar range from $500 to $1,300, depending on the specific model and root cause.
Which Jaguar models have C1785 documented?▼
Au7o has documented C1785 on 1 Jaguar model: XK.