DTC C1248 EBCM Turned the Red Brake Warning Indicator On. Buick LeSabre 2000

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2000 🢒 LeSabre 🢒 DTC 🢒 DTC C1248 EBCM Turned the Red Brake Warning Indicator On

Circuit Description

The dynamic rear proportioning (DRP) is a control system that replaces the hydraulic proportioning function of the proportioning valve in the base brake system. The DRP control system is part of the operating software in the EBCM. The DRP uses active control with the existing ABS in order to regulate the vehicle's rear brake pressure.

This DTC sets in order to indicate that the EBCM illuminated the BRAKE warning indicator. The EBCM cannot perform the DRP due to another fault in the ABS/TCS system.

Conditions for Running the DTC

One or more faults have been detected by the EBCM in the ABS/TCS systems.

Conditions for Setting the DTC

One of the following conditions exists:

•	DTC C1214, C1217, C1237, C1254, C1255, C1261-1268, or C1271-1274 sets.

•	DTC C1236 sets and the system voltage is less than 8.5 volts.

•	Two wheel speed sensor DTCs on the same axle set.

Action Taken When the DTC Sets

•	The EBCM disables the DRP for the duration of the ignition cycle.

•	The red BRAKE warning indicator turns ON.

Conditions for Clearing the DTC

•	The condition for the DTC is no longer present and the DTC is cleared with a scan tool.

•	The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

•	Use this DTC in order to differentiate which of the following conditions is present:

-	The EBCM turned ON the red BRAKE warning indicator.

-	The instrument cluster turned ON the red BRAKE warning indicator due to low brake fluid in the master cylinder reservoir.

-	The instrument cluster turned ON the red BRAKE warning indicator due to the application of the park brake.

•	Diagnose any other ABS DTCs that set along with this DTC.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step verifies whether other ABS/TCS/VSES DTCs are set.

Step	Action	Value(s)	Yes	No
1	Did you perform the ABS Diagnostic System Check?		Go to Step 2	Go to Diagnostic System Check - ABS
2	Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the DTC Information parameter in DRP/ABS/TCS/TIM/VSES Diagnostic Trouble Codes (DTC). Does the scan tool display any other ABS/TCS/VSES DTCs?	--	Go to Diagnostic Trouble Code (DTC) List/Type	Go to Step 3
3	Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?	--	Go to Step 2	Go to Testing for Intermittent Conditions and Poor Connections in Wiring System

Step

Action

Value(s)

Yes

Did you perform the ABS Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - ABS

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the DTC Information parameter in DRP/ABS/TCS/TIM/VSES Diagnostic Trouble Codes (DTC).

Does the scan tool display any other ABS/TCS/VSES DTCs?

Go to Diagnostic Trouble Code (DTC) List/Type

Go to Step 3

Use the scan tool in order to clear the DTCs.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

Go to Testing for Intermittent Conditions and Poor Connections in Wiring System