Code Definition

C1000 — Brake Light Switch Malfunction

System: Chassis  |  Type: Manufacturer-Specific  |  Make: Jeep

About C1000

C1000 is a manufacturer-specific chassis diagnostic trouble code recorded for Jeep vehicles. It belongs to the C-prefix family of codes, which covers chassis, braking, steering, suspension, or stability-control faults.

Scanning & clearing: Chassis (C) codes are stored in the ABS, traction control, or stability-control modules. An enhanced or OEM-level scan tool is usually required to read and clear them.

C1000 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The ABS or Electronic Stability Control (ESC) module monitors the brake pedal input signal from the brake light switch to determine driver brake application and integrate that input with wheel speed, yaw rate, and brake pressure sensors during stability events. DTC C1000 is set when the module detects an implausible, missing, or inconsistent brake switch signal compared to expected states, such as the brake switch remaining off when master cylinder pressure is detected, or remaining on when the brake pedal is released. The module compares the brake switch input against brake pressure or pedal ...

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