GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Terraza 🢒 DTC 🢒 DTC 011

Circuit Description

The automatic level control sensor monitors the accessory inflator valve circuit for a short to ground, or an open circuit.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC 011 Accessory Inflator Valve Circuit

Conditions for Running the DTC

The ignition is ON.

Conditions for Setting the DTC
    • Open in control circuit of the accessory inflator valve
    • Short to ground in the control circuit of the accessory inflator valve
    • A malfunctioning accessory inflator valve

Action Taken When the DTC Sets
    • The automatic level control sensor disables inflator functions.
    • Leveling functions shall continue.
    • The automatic level control sensor will recheck the accessory inflator valve circuitry periodically.

Conditions for Clearing the DTC

The conditions that caused the DTC to set have been removed.

Diagnostic Aids

When this DTC occurs, DTCs 032 and 033 will be set.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step tests for voltage at the coil side of the accessory inflator valve. The ELC relay fuse supplies power to the coil side of the accessory inflator valve.

    2.

  2. This step verifies that the height sensor is providing ground to the accessory inflator valve.

    3.

  3. This step tests if ground is constantly being applied to the accessory inflator valve.

    4.

  4. This step verifies that the automatic level control sensor is self tested after replacement.

Step

Action

Yes

No

Schematic Reference: Automatic Level Control Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Turn ON the ignition.
  2. Disconnect the accessory inflator valve.
  3. Probe the battery positive voltage circuit of the accessory inflator valve with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 3

Go to Step 7

3

  1. Connect a test lamp between the control circuit of the accessory inflator valve and the battery positive voltage circuit of the accessory inflator valve.
  2. With the accessory inflator switch, command the accessory inflator valve ON and OFF .

Does the test lamp turn ON and OFF with each command?

Go to Step 5

Go to Step 4

4

Test the control circuit of the accessory inflator valve for the following conditions:

    • A ground
    • An open
        

Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 6

5

Inspect for poor connections at the accessory inflator valve. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

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 height sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 9

7

Repair the battery positive voltage circuit of the accessory inflator valve. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 10

--

8

Replace the accessory inflator valve. Refer to Inflator Solenoid Replacement .

Did you complete the replacement?

Go to Step 10

--

9

Important: System untested code 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