2010 Cadillac Truck Escalade AWD V8-6.2L Page 1001
锟斤拷If all circuits test normal, test or replace the automatic level control compressor assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Air Tube Repair (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic )/Air Line/Service and Repair)
* Air Compressor Replacement (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic
)/Compressor/Pump/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for Air Suspension Control Module replacement,
setup and programming
C0712
DTC C0712
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC C0712 01
- Level Control Compressor Relay Circuit Short to Battery
DTC C0712 06
- Level Control Compressor Relay Circuit Short to Ground or Open Circuit
Diagnostic Fault Information
Circuit/System Description
The electronic suspension control module (ESCM) adjusts the vehicle suspension ride height. The ESCM determines the height of the vehicle based
on the voltage from the suspension position sensors. The module grounds the ELC relay and the exhaust control solenoid to raise and lower the
vehicle in order to keep the vehicle level.
Conditions for Running the DTC
* The ESCM is powered up.
* The ESCM is commanding the compressor ON.
Conditions for Setting the DTC
* The compressor relay coil control circuit is shorted to voltage, ground, or open for 5 seconds.
* The compressor relay coil supply voltage circuit is shorted to ground, or open for 5 seconds.
Action Taken When the DTC Sets
The automatic level control (ALC) system will be inoperative.
Conditions for Clearing the DTC
The ESCM does not detect a failure during the self test.
Diagnostic Aids
This circuit is monitored during every functional operation of the compressor relay output and every 3.3 milliseconds when output is active. If a
