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Home >> Cadillac >> 2002 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 974 (Body Control System) >> Diagnostic Information and Procedures >> DTC B1004: Electronic Control Unit Identification Circuit >> Diagnostic Aids
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Diagnostic Aids

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1004

Step Action Yes No
1 Did you perform the Diagnostic System Check for the system exhibiting the symptom? Go to Step 2  Go to Control Module References  for the applicable Diagnostic System Check
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Retrieve DTCs.
Is the DTC retrieved as a current DTC?
Go to Step 3  Go to Diagnostic Aids
3
IMPORTANT: Perform the programming or setup procedure for the module if required.
Replace the control module setting the DTC as current. Refer to Control Module References .Did you complete the replacement?
Go to Step 4  -
4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?
Go to Step 2  System OK