Test Description
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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: This step tests for voltage at the coil side of the exhaust valve. The ELC fuse supplies power to the coil side of the exhaust valve.
- 3: This step verifies that the automatic level control sensor is providing ground to the exhaust valve.
- 4: This step tests if ground is constantly being applied to the exhaust valve.
- 9: This step verifies that the automatic level control sensor is self tested after replacement.
DTC 031
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Automatic Level Control Suspension Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Step 3 | Go to Step 7 |
| 3 | Connect a test lamp between the control circuit of the exhaust valve and the battery positive voltage circuit of the exhaust valve. Does the test lamp illuminate? |
Go to Step 4 | Go to Step 5 |
| 4 | Test the control circuit of the exhaust valve for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 6 |
| 5 | Inspect for poor connections at the exhaust valve. Refer to Testing for Intermittent Conditions and Poor Connections
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the automatic level control sensor. Refer to Testing for Intermittent Conditions and Poor Connections
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 7 | Repair the battery positive voltage circuit of the exhaust valve. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 10 | - |
| 8 | Replace the exhaust valve. Refer to Air Compressor Replacement . Did you complete the replacement? |
Go to Step 10 | - |
| 9 |
IMPORTANT:
System untested codes will continue to flash until self test has been completed after automatic level control sensor replacement. Replace the automatic level control sensor. Refer to Automatic Level Control Sensor Replacement .Did you complete the replacement? |
Go to Step 10 | - |
| 10 | Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset? |
Go to Step 2 | System OK |