For 1990-2009 cars

### Circuit Description

The compress accumulator will detect conditions of excessive rear suspension leveling air compressor activity. Usually this condition is generally due to the presence of pneumatic leaks or vehicle overload conditions. An accumulator timer will keep track of the compressor run time. The timer resets at each ignition cycle or if an exhaust sequence has occurred.

### Conditions for Setting the DTC

If the compressor is active for more than 3 minutes before the rear of the vehicle reaches a trim position.

### Action Taken When the DTC Sets

• | All compressor activity is disabled.

• | The LEVELING indicator lamp flashes.

• | DTC 10 is stored as a history code at the end of the ignition cycle.

### Conditions for Clearing the DTC

• | The DTC will clear when no error is detected and the cause for the error has been repaired.

• | Using a scan tool.

### Diagnostic Aids

Refer to the diagnositc table.

### Test Description

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

1. Checks condition of the rear suspension leveling air compressor relay K19.

#### DTC 10 Intake Accumulator Malfunction

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the system leak test performed? | -- | Go to Step 2 | Go to ALC Suspension System Check .
2 | Disconnect the rear suspension leveling air compressor relay K19 from the relay box. Is the rear suspension leveling air compressor still active? | -- | Go to Step 4 | Go to Step 3
3 | Replace the rear suspension leveling air compressor relay K19. Is the replacement complete? | -- | Go to Step 4 | --
4 |

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.

Does the LEVELING indicator lamp flash?

--

Go to Step 1

System OK