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 numbers below refer to the step numbers 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.
- 4: The symptom list in Symptoms will determine the correct diagnostic procedure to use.
- 5: 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 - Radio/Audio System
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
|
Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 | Attempt to establish communication with the following:
Does the scan tool communicate with all devices present? |
Go to Step 3 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 3 |
IMPORTANT:
The engine may start during the following step. Turn OFF the engine as soon as you have observed the Crank power mode.
|
Go to Step 4 | Go toPower Mode Mismatch in Body Control System |
| 4 | Select the following display DTC functions on the scan tool:
Does the scan tool display any DTCs? |
Go to Step 5 | Go toSymptoms - Entertainment |
| 5 | 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 6 |
| 6 | Does the scan tool display DTC B1000, B1007, or B1009? | Go toDiagnostic Trouble Code (DTC) List in Body Control System | Go to Step 7 |
| 7 | Does the scan tool display DTC B1327? | Go to Diagnostic Trouble Code (DTC) List in Engine Electrical | Go to Diagnostic Trouble Code (DTC) List |