Service Information

Volt

DTC C0267

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 00: Low Brake Fluid Indicated

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Signal	C0267 00	C0267 00	1	--
Ground	--	C0267 00	--	--
1. Brake Warning Indicator Malfunction

Circuit/System Description

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

Conditions for Running the DTC

Vehicle in Service Mode.

Conditions for Setting the DTC

•	A short to ground detected on the brake fluid level signal circuit for 60 seconds.

•	Low brake fluid level is detected for 60 seconds.

Action Taken When the DTC Sets

One or more of the following actions may occur:

•	The vehicle stability enhancement system (VSES) and traction control system (TCS) is disabled.

•	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.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

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

⇒	If low, refer to Brake Fluid Loss .

Vehicle in Service Mode, observe the scan tool Brake Fluid Level Sensor parameter. The reading should be OK.

Circuit/System Testing

Vehicle OFF, disconnect the harness connector at the B20 brake fluid level switch.
Test for less than 10 Ω between the ground circuit terminal B and ground.

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

Vehicle in Service Mode, test for 12.0-12.8 V between the sensor signal circuit terminal A and ground.

⇒	If outside specified range, test the signal circuit terminal A for a short to ground.

Note: The parameter may take up to 60 seconds to switch from OK to Low.

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

⇒	If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K17 electronic brake control module (EBCM).

If all circuits test normal, test or replace the B20 brake fluid level switch.

Component Testing

Vehicle OFF, disconnect the harness connector at the B20 brake fluid level switch.
Test for 9.5-10.5 KΩ between the ground circuit terminal B and the signal circuit terminal A with the switch in the open position.

⇒	If outside the specified range, replace the B20 brake fluid level switch.

Test for less than 5 Ω between the signal terminal A and ground terminal B with the switch in the closed position.

⇒	If greater than the specified range, replace the brake fluid level switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Master Cylinder Reservoir Replacement

•	Control Module References for EBCM replacement, programming and setup