• | 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 Signal | C0267 | 1 | 1 | -- |
Brake Fluid Level Ground | -- | 1 | -- | -- |
Park Brake Signal | 1 | 1 | 1 | -- |
Park Brake Ground | -- | 1 | -- | -- |
1. Brake Warning Indicator Malfunction |
The brake fluid level switch monitors the level of brake fluid in the master cylinder. When the electronic brake control module (EBCM) sees the brake fluid level switch input grounded, it sends a serial data message to the instrument panel cluster (IPC) to turn ON the Red Brake Warning indicator.
The ignition is ON.
• | Low brake fluid is detected. |
• | A short to ground exists on the signal circuit. |
The red Brake warning indicator illuminates.
• | The condition for the DTC is no longer present. |
• | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Brake Warning System Description and Operation
Control Module References for scan tool information
⇒ | If low, refer to Brake Fluid Loss. |
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If not the specified value, test the signal circuit 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 EBCM. |
⇒ | If less than the specified value, replace the brake fluid level switch. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for EBCM replacement, setup, and programming |