Circuit Description
The air suspension compressor assembly monitors the calibrations in the electrically erasable programmable read-only memory (EEPROM). The module also monitors the compressor, solenoids and internal wiring for faults.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC 001 System Disabled Information Stored
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The air suspension compressor assembly detects an invalid EPROM checksum or internal component failure.
Action Taken When the DTC Sets
Depending on the condition that set the DTC, some or all functions will be disabled.
Conditions for Clearing the DTC
The DTC will automatically clear when the condition for setting the DTC is removed and the ignition has cycled from on to off to on.
Diagnostic Aids
The air suspension compressor assembly will set a DTC 001 when any of these conditions are present:
| • | A checksum error in EEPROM is present. |
| • | The compressor is shorted or open. |
| • | The compressor solenoids are shorted or open. |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Suspension Controls Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Does the LED flash DTC 001? | Go to Step 4 | Go to Step 5 |
4 | Replace the air suspension compressor assembly. Refer to Automatic Level Control Air Compressor Replacement . Did you complete the replacement? | Go to Step 5 | -- |
5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | |
