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Home >> Cadillac >> 2003 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 459 (Antilock Brake System, Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0201: Antilock Brake System (ABS) Enable Relay Contact Circuit >> Test Description
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Test Description

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

  1. 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 (W/O JL4)  or Diagnostic System Check - ABS (W/JL4) 
2
  1. Use the scan tool to clear the DTCs.
  2. Turn OFF the ignition for 5 seconds.
  3. Turn ON the ignition.
Does the DTC reset?		 - Go to Step 3  Go to Diagnostic Aids
3 
  1. Separate the EBCM from the BPMV. Refer to Electronic Brake Control Module Replacement (w/ JL4)  or Electronic Brake Control Module Replacement (w/o JL4) .
  2. 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?		 OL Go to Step 6  Go to Step 5 
5
IMPORTANT: Following EBCM replacement, perform the set-up procedure for the EBCM and perform the Yaw Rate Reference Table Reset Procedure. Use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM. Refer to Electronic Brake Control Module Replacement (w/ JL4)  or Electronic Brake Control Module Replacement (w/o JL4) .Did you complete the replacement?		 - Go to Step 7  -
6
IMPORTANT: Following EBCM replacement, perform the set-up procedure for the EBCM and perform the Yaw Rate Reference Table Reset Procedure. Use the scan tool to perform the Tire Size Calibration procedure.
Replace the EBCM and the BPMV. Refer to Electronic Brake Control Module Replacement (w/ JL4)  or Electronic Brake Control Module Replacement (w/o JL4)  and Brake Pressure Modulator Valve (BPMV) Replacement (w/ JL4)  or Brake Pressure Modulator Valve (BPMV) Replacement (w/o JL4) .Did you complete the replacements?		 - Go to Step 7  -
7
  1. Use the scan tool to clear the DTCs.
  2. Turn OFF the ignition for 5 seconds.
  3. Turn ON the ignition.
Does the DTC reset?		 - Go to Step 3  System OK
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