For 1990-2009 cars

### Circuit Description

The LEVELING indicator lamp is activated by the Automatic Level Control (ALC) sensor whenever a compress cycle is requested. The sensor provides a switched path to ground. The sensor will flash the lamp when certain DTCs are detected.

### Conditions for Setting the DTC

The DTC will set when the sensor detects that the lamp output is not pulled down ground when the sensor output is active and the ignition signal is high.

### Action Taken When the DTC Sets

• | The sensor's discrete low side output drive for the lamp is disabled.

• | The sensor continuously attempts to recover from the fault.

• | DTC 09 is stored as a history code at the end of the ignition cycle.

### Conditions for Clearing the DTC

• | The DTC will clear when B+ is present at the low side output drive.

• | Using a scan tool.

### Diagnostic Aids

• | Check the integrity of the LEVELING indicator lamp bulb.

• | Refer to the diagnostic table.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. Check for an short to B+ in circuits XY1 and/or XY2.

#### DTC 09 Level Control Indicator Short to Battery

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Automatic Level Control (ALC) System Check performed? | -- | Go to Step 2 | Go to ALC Suspension System Check .
2 |

1. Disconnect the Automatic Level Control (ALC) sensor connector.
2. Use a DMM to measure the voltage between terminal G of the sensor and a known good ground.

Is the voltage reading within the specified value?

--

Go to Step 3

Go to Step 4

3 | Locate and repair a short to B+ in circuits XY1 and/or XY2. Is the repair complete? | -- | Go to Step 5 | --
4 | Replace the ALC sensor. Refer to Automatic Level Control Sensor Replacement . Is the replacement complete? | -- | Go to Step 5 | --
5 |

1. Turn the ignition switch to the OFF position.
2. Connect all of the connectors that were disconnected.
3. Reinstall all of the components that were removed.
4. Turn the ignition switch to the ON position.
5. Wait for at least 15 seconds. Check the operation of the LEVELING indicator lamp.

Does the LEVELING indicator lamp operate properly?

--

System OK

Go to Step 1