Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The number(s) below refer to the step number(s) on the diagnostic table.
- 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
- 3: Determine if Body Control Module DTCs which may affect Lighting System operation are present.
- 4: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
Diagnostic System Check - Lighting Systems
| 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 |
|
Go to Step 4 | Go to Symptoms - Lighting Systems |
| 4 | Does the scan tool display any DTCs which 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 DTC B0605? | Go to Diagnostic Starting Point - Body Control System in Body Control Systems | Go to Step 6 |
| 6 | Does the scan tool display DTC P0562 or P0563? | Go to Diagnostic System Check - Engine Controls in Engine Controls- 5.7 (LS1) | Go to Diagnostic Trouble Code (DTC) List |