Diagnostic Instructions
| • | 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. |
DTC Descriptor
DTC C0267: Low Brake Fluid IndicatedDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Low Brake Fluid Signal Circuit | C0267 | C0130 | -- | -- |
Ground | -- | C0130 | C0130 | -- |
Circuit/System Description
The electronic brake control module (EBCM) monitors the brake fluid level switch via the brake fluid level sensor signal circuit. With the switch closed, the signal circuit is pulled to ground indicating low fluid level. When low fluid level is seen, the EBCM will send a serial data message to the IPC illuminating the red brake warning indicator. The body control module (BCM) monitors the park brake switch via the park brake switch signal circuit. With the park brake applied, the switch is closed and the signal circuit is grounded. The BCM will then send a serial data message to the IPC requesting the red brake warning indicator be illuminated.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
The EBCM detects low brake fluid.
Action Taken When the DTC Sets
| • | The EBCM disables the traction control system (TCS)/dynamic rear proportion (DRP)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
| • | A DIC message and/or a warning indicator may be displayed. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Hydraulic Brake Connector End Views
Description and Operation
Brake Warning System Description and Operation
Electrical Information Reference
Circuit/System Verification
- Verify the brake fluid is at the proper level.
- Verify the scan tool EBCM Brake Fluid parameter is OK.
| ⇒ | If the brake fluid is not at the proper level, refer to Brake Fluid Loss |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the brake fluid level switch.
- Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal 1 and ground.
- Ignition ON, verify the scan tool EBCM Brake Fluid parameter is OK.
- Install a 3A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool EBCM Brake Fluid parameter is Low.
- If all circuits test normal, test or replace the brake fluid level switch.
| ⇒ | 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 2 for a short to ground. If the circuit tests normal, replace the EBCM. |
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for EBCM replacement, setup, and programming |
