For 1990-2009 cars

### Circuit Description

The consecutive intake register will keep track of the number of times a compress sequence is initiated, without an exhaust sequence, while the vehicle is moving. This allows detection of air leaks when the vehicle is moving.

### Conditions for Setting the DTC

When the number of compress sequences is more than 10, without an exhaust sequence.

### Action Taken When the DTC Sets

• | All compressor activity is disabled.

• | The LEVELING indicator lamp flashes.

• | DTC 12 is stored as a history code at the end of the ignition cycle.

### Conditions for Clearing the DTC

• | Initiation of an exhaust sequence.

• | Cycling the ignition.

• | Using a scan tool.

### Diagnostic Aids

Perform the system leak test. Refer to Automatic Level Control.