2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 970
* The damper coil or the circuits to the coil are shorted to ground, shorted to voltage, or open for 3 consecutive ignition ON cycles.
* The vehicle must be driven over 4.8 km/h (3 mph).
Action Taken When the DTC Sets
* The driver information center (DIC) displays the SERVICE SUSPENSION SYSTEM message.
* If the DTC symptom 01 is stored, the ESC system is disabled.
* If the DTC symptom 02 or 04 is stored, the suspect damper is disabled.
Conditions for Clearing the DTC
* A current DTC will clear on the next consecutive malfunction-free ignition cycle.
* A history DTC will clear after 50 consecutive malfunction-free ignition cycles.
Reference Information
Schematic Reference
Electronic Suspension Control Schematics (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic
)/Diagrams/Electrical Diagrams/Electronic Suspension Control)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Electronic Suspension Control Description and Operation (See: Steering and Suspension/Suspension/Suspension Control ( Automatic - Electronic
)/Description and Operation/Electronic Suspension Control Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, with the scan tool command the damper actuators ON and OFF while jouncing the vehicle in the front and rear. The suspension
should change stiffness when commanded between the ON and OFF state.
Circuit/System Testing
Important: Whenever repairing and/or replacing ALC system components, perform the Suspension Position Calibration procedure.
1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
2. Perform this setup step in the following order:
1. Connect a test lamp between the damper connector control circuit terminal A and control circuit terminal B.
2. Ignition ON, with a scan tool, clear all ESC module DTCs.
3. Command the damper ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
锟斤拷If the test lamp is always ON, test the control circuit terminal A for a short to voltage. If the circuit tests normal, replace the ESC module.
锟斤拷If the test lamp is always OFF, test the control circuits listed below. If all circuits test normal, replace the ESC module.
* Control circuit terminal A for a short to ground or open/high resistance.
* Control circuit terminal B for an open/high resistance or short to voltage.
4. If all circuits test normal, test or replace the suspension damper.
Component Testing
1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
