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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 222 (Antilock Brake System And Traction Control System) >> Diagnostic Information and Procedures >> DTC C1242 or C1243 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. 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.

  1. 5:  Tests the ability of the EBCM to control the pump motor. If the test lamp illuminates, the pump motor circuit within the EBCM is good.
DTC C1242 or C1243

Step Action Yes No
Schematic Reference:  ABS Schematics  
Connector End View Reference:  ABS Connector End Views  
1 Did you perform the ABS Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - ABS 
2
  1. Use the scan tool in order to clear the DTCs.
  2. With the scan tool, perform the Automated Test.
Does the DTC reset?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3
  1. Remove the EBCM from the BPMV. Refer to Electronic Brake Control Module Replacement .
  2. Inspect the EBCM to BPMV connector for conditions which could cause an intermittent, such as damage, corrosion, poor terminal contact, or presence of brake fluid.
Is the connector OK and the cavity free of brake fluid?		 Go to Step 5  Go to Step 4 
4
  1. If connector corrosion or damage is evident, replace BPMV and/or EBCM as necessary.
  2. If brake fluid is present, replace both BPMV and EBCM. Refer to Brake Pressure Modulator Valve (BPMV) Replacement  and Electronic Brake Control Module Replacement .
Did you complete the repair?		 Go to Step 8  -
5 
  1. Connect the EBCM harness to the EBCM with the BPMV still separated.
  2. Connect a test lamp between the pump motor circuits, internal EBCM side, using the J 35616  GM terminal test kit.
  3. With the scan tool, perform the Automated Bleed.
Does the test lamp illuminate?		 Go to Step 7  Go to Step 6 
6 Replace the EBCM. Refer to Electronic Brake Control Module Replacement .
Did you complete the repair?		 Go to Step 8  -
7 Replace the BPMV. Refer to Brake Pressure Modulator Valve (BPMV) Replacement .
Did you complete the repair?		 Go to Step 8  -
8
  1. Use the scan tool in order to clear the DTCs.
  2. With the scan tool, perform the Automated Test.
Does the DTC reset?		 Go to Step 2  System OK
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