Test Description

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

3: A shorted ABS pump motor may damage the contacts within the system relay. It is imperative that the steps in the table be followed to prevent damage to a replacement EBCM.

DTC C0201

Step	Action	Values	Yes	No
Schematic Reference: ABS Schematics
1	Did you perform the ABS Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - ABS
2	Use a scan tool in order to clear the DTCs. Use the scan tool in order to perform an ABS Function Test. Does the DTC set?	-	Go to Step 3	Go to Diagnostic Aids
3	Separate the EBCM from the BPMV. Refer to Electronic Brake Control Module Replacement . Use a DMM in order to measure the resistance across the ABS pump motor. Does the resistance measure within the specified range?	0.3-1.0 Ω	Go to Step 4	Go to Step 6
4	Use a DMM in order to measure the resistance between the high side of the pump motor and a good ground. Does the resistance measure less than the specified value?	0L	Go to Step 6	Go to Step 5
5	IMPORTANT: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM. Refer to Electronic Brake Control Module Replacement .Did you complete the replacement?	-	Go to Step 7	-
6	IMPORTANT: Following EBCM replacement, use the scan tool to perform the Tire Size Calibration procedure. Replace the EBCM and the BPMV. Refer to Electronic Brake Control Module Replacement and Brake Pressure Modulator Valve (BPMV) Replacement .Did you complete the replacements?	-	Go to Step 7	-
7	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 3	System OK