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 Descriptors
DTC C0130: Low Brake Fluid Circuit OpenDTC C0267: Low Brake Fluid Indicated
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Brake Fluid Level Signal | C0267 | C0130 | 1 | -- |
Park Brake Signal | 1 | 1 | 1 | -- |
Ground | -- | 1 | -- | -- |
1. Brake Warning Indicator Malfunction | ||||
Circuit/System Description
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 body control module (BCM) and the BCM sends a serial data message to the instrument panel cluster (IPC) to turn ON the Red Brake Warning indicator.
Conditions for Running the DTC
Ignition ON.
Conditions for Setting the DTC
C0130
The EBCM detects an open in the low brake fluid circuit.
C0267
| • | Low brake fluid is detected. |
| • | A short to ground exists on the signal circuit. |
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 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
Description and Operation
Brake Warning System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Verify the brake fluid is at the proper level.
- Verify the scan tool EBCM Brake Fluid Level 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 between the ground circuit terminal 1 and ground.
- Ignition ON, verify the scan tool EBCM Brake Fluid Level parameter is OK.
- Install a 3A fused jumper wire between the signal circuit terminal 2 and ground. Verify the scan tool EBCM Brake Fluid Level 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 |
