Test Description
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 class 2 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.
Diagnostic System Check - ABS
| 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 in order to display DTCs for the following 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", DTC C0290, C0292-C0297? | 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 P0500, P0502, P0503, P0562, P0563, P0601-P0607, P1381, P1621, P1627 or P1683? | Diagnostic Trouble Code (DTC) List in Engine Controls 4.8L, 5.3L, and 6.0L | Go to Step 6 |
| 6 | Does the scan tool display DTC B1372? | Go to Diagnostic Trouble Code (DTC) List in Instrument Panel, Gages, and Console | Go to Diagnostic Trouble Code (DTC) List |