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Home >> Pontiac >> 2005 >> Aztek Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Antilock Brake System And Traction Control System) >> Diagnostic Information and Procedures >> DTC C1218 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. 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 C1218

Step Action 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
  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 connector OK and 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 9  -
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  Connector Test Adapter Kit .
  3. With the scan tool, perform the Automated Bleed.
Does the test lamp illuminate?		 Go to Step 8  Go to Step 6 
6
  1. Turn OFF the ignition.
  2. Disconnect the EBCM connector.
  3. Connect the J 39700  universal pinout box using the. See Special Tools and Equipment .J 39700-99  cable adapter to the EBCM harness connector only. See Special Tools and Equipment .
  4. Test both ground circuits of the EBCM including the EBCM ground for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 9  Go to Step 7 
7 Replace the EBCM. Refer to Electronic Brake Control Module Replacement  .
Did you complete the repair?		 Go to Step 9  -
8 Replace the BPMV. Refer to Brake Pressure Modulator Valve (BPMV) Replacement  .
Did you complete the repair?		 Go to Step 9  -
9
  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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