C0267

DTC C0267

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

DTC Descriptor
DTC C0267 00
- Low Brake Fluid Indicated

Diagnostic Fault Information





Circuit/System Description

The brake fluid level switch monitors the level of brake fluid in the brake fluid reservoir.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

* A short to ground detected on the brake fluid level signal circuit for 5 seconds.
* Low brake fluid level is detected for 5 seconds.

Conditions for Clearing the DTC

The condition for setting the DTC is no longer present.

Reference Information
Schematic Reference

Hydraulic Brake Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Brake Warning System Description and Operation (Brake Warning System)
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Inspect for proper brake fluid level. The fluid level should be above minimum level.

• If low, refer to Brake Fluid Loss (Brake Fluid Loss).

2. Ignition ON, observe the scan tool Brake Fluid Level Sensor parameter. The reading should be OK.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B20 Brake Fluid Level Switch.
2. Test for less than 5 ohm between the ground circuit terminal 2 and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify the scan tool Brake Fluid Level Sensor parameter is OK.

• If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K17 Electronic Brake Control Module (EBCM).

4. Install a 3A fused jumper wire between the signal circuit terminal 1 and ground.
5. Verify the scan tool Brake Fluid Level Sensor parameter is Low.

• 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 K17 electronic brake control module (EBCM).

6. If all circuits test normal, test or replace the B20 Brake Fluid Level Switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the B20 Brake Fluid Level Switch.
2. Test for greater than 5 ohm between the ground circuit terminal 2 and the signal circuit terminal 1.

• If less than the specified value, replace the B20 Brake Fluid Level Switch. Infinite resistance between signal terminal 1 and ground.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Master Cylinder Reservoir Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for EBCM replacement, setup and programming