Test Description
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 GMC Yukon XL, 2004 GMC Yukon, 2004 Chevrolet Tahoe, 2004 Chevrolet Suburban, and 2004 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers in the diagnostic table.
- 2: Lack of communication may be due to partial or total malfunction of the serial data circuit. The specified procedure will determine the particular condition.
- 4: The presence of DTCs that begin with a "U" indicates that some other module is not communicating. The specified procedure will compile all of the available information before tests are performed.
- 5: Since the VSES interacts extensively with powertrain control systems, powertrain related DTCs should be diagnosed and repaired prior to diagnosing any VSES concerns.
- 6: The presence of this DTC, which the scan tool may display in Powertrain, may cause the EBCM to set DTC C0283.
- 7: The presence of this DTC, which may be set by the body control module (BCM), may cause the EBCM to set DTC C0455.
Diagnostic System Check - ABS (W/JL4)
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Install a scan tool. Does the scan tool power up? |
Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 |
|
Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 3 | Use the scan tool to display DTCs for the following systems or specific control modules.
Does the scan tool display any DTCs for the control modules listed above? |
Go to Step 4 | Go to Symptoms - Antilock Brake System |
| 4 | Does the scan tool display any DTCs that begin with a "U"? | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | Go to Step 5 |
| 5 | Does the scan tool display any DTCs that begin with a "P"? | Go to Diagnostic System Check - Engine Controls in Engine Controls - 4.8L, 5.3L, or 6.0L | Go to Step 6 |
| 6 | Does the scan tool display DTC B2725? | Go to Diagnostic System Check - Transfer Case in Transfer Case - BW 4482-NR4 | Go to Step 7 |
| 7 | Does the scan tool display DTC B2620? | Go to Diagnostic System Check - Lighting Systems in Lighting Systems | Go to Diagnostic Trouble Code (DTC) List |