C0660
DTC C0660
Circuit Description
The air suspension exhaust valve is controlled by the air suspension module. The air suspension module provides a switched path to voltage whenever exhaust valve activity is required. The air suspension module monitors the exhaust valve circuity to determine if the voltage level agrees with the command state.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0660 Level Control Exhaust Valve Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
Air suspension module senses exhaust valve voltage does not agree with command state.
Action Taken When the DTC Sets
* Air suspension functionality is suspended.
* SERVICE AIR SUSPENSION message is displayed.
Conditions for Clearing the DTC
The DTC will clear when the condition for setting the DTC is removed.
Diagnostic Aids
This DTC is set when the exhaust valve circuitry is shorted to ground, voltage and open.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. During the air suspension exhaust valve operation, listen for an audible click. Command the ON and the OFF states. Repeat the commands as necessary.
3. Verifies that the air suspension module is providing voltage to the air suspension exhaust valve.
4. Tests for an open in the ground circuit to the air suspension exhaust valve.
5. Tests for constant voltage to the air suspension exhaust valve.
