Test Description
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.
- 3: Check for the presence of DTCs.
- 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.
- 5: Check for the presence of DTCs in Body Control system.
- 6: Check for the presence of DTCs in Automatic Level Control system.
Diagnostic System Check - Automatic Level Control
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Automatic Level Control Suspension Schematics | |||
| 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 | Select the suspension control module display DTCs function on the scan tool. Does the scan tool display any DTCs? |
Go to Step 4 | Go to Symptoms - Automatic Level Control |
| 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 B1000? | Go to DIAGNOSTIC TROUBLE CODE (DTC) LIST in Body Control System | Go to Step 6 |
| 6 | Does the scan tool display DTC C0655, C0660, or C0711? | Go to Diagnostic Trouble Code (DTC) List | Go to DIAGNOSTIC TROUBLE CODE (DTC) LIST in Real Time Damping |