Automatic Level Control
DTC 022
Circuit Description
The automatic level control sensor monitors the level control compressor relay coil control circuity for a open circuit or short to battery.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC 022 Level Control Compressor Relay Circuit Short to Battery or Open
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
This DTC is set when the automatic level control sensor detects the level control compressor relay coil control circuit is open or shorted to battery.
Action Taken When the DTC Sets
^ The automatic level control sensor disables the compressor.
^ Lowering functions shall continue.
^ The automatic level control sensor disables inflator functions.
Conditions for Clearing the DTC
The conditions that caused the DTC to set have been removed.
Diagnostic Aids
A short to battery or an open circuit in the level control compressor relay coil control circuit will set this DTC.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. This step tests for battery positive voltage at the relay coil. The ELC fuse supplies power to the relay coil of the level control compressor relay.
3. This step verifies that the automatic level control sensor is providing ground to the level control compressor relay.
4. This step tests if battery positive voltage is constantly being applied to the level control compressor relay control circuit or the circuit is open.
9. This step verifies that the automatic level control sensor is self tested after replacement.
