• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Brake Fluid Level Sensor Signal | C0267 | -- | -- | -- |
The brake fluid level switch monitors the level of brake fluid in the master cylinder. When the instrument panel cluster (IPC) sees the brake fluid level switch input grounded, it turns ON the Red Brake Warning indicator and sends a serial data message to the electronic brake control module (EBCM) indicating the brake fluid level is low.
The ignition is ON.
Low brake fluid is detected.
• | The EBCM disables the antilock brake system (ABS), traction control system (TCS), dynamic rear proportion (DRP), and vehicle stability enhancement system (VSES). |
• | The ABS indicator is illuminated. |
• | The Traction Control indicator is illuminated. |
• | The Red Brake Warning indicator is illuminated. |
• | A current DTC will clear when the fault is no longer present. |
• | A history DTC will clear after 100 consecutive fault-free drive cycles. |
Hydraulic Brake Connector End Views
Brake Warning System Description and Operation
Ignition ON, verify brake fluid in the master cylinder reservoir is above the minimum level.
⇒ | If fluid level is below the minimum, refer to Brake Fluid Loss . |
Important: This test should only be performed if brake fluid is above the minimum level.
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the IPC. |
⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for IPC replacement, setup, and programming |