2010 Cadillac CTS Sedan AWD V6-3.6L Page 770

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 770



Action Taken When the DTC Sets



* The electronic suspension control system (ECS) is disabled for the duration of the ignition cycle.



* The TCS indicator illuminates on the IPC.



* The DIC displays the Service Stability System message, if equipped.



* Disable All Functionality



Conditions for Clearing the DTC



The DTC is saved as history when the ESC module no longer sees battery voltage outside the normal range of 9-15.5 V. The DTC will clear if the



fault does not return after 50 consecutive ignition cycles.



Diagnostic Aids



* A high or low voltage DTC set in multiple modules indicates a concern in the charging system.



* A possible cause of this DTC could be overcharging with a battery charger or jump starting.



* A high or low voltage value in multiple modules indicates a concern in the charging system.



Reference Information



Schematic Reference



Electronic Suspension Control Schematics (See: Diagrams/Electrical Diagrams/Suspension Control ( Automatic - Electronic ))



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)



Electrical Information Reference



* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)



* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit



Testing/Testing for Intermittent Conditions and Poor Connections)



* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.



Circuit/System Verification



1. Engine running measure and record the voltage at the battery terminals.



2. Verify that the battery voltage is 12.6-15.5 V.



瀚慖f the battery voltage is not within the specified range, refer to Charging System Test (See: Starting and Charging/Testing and



Inspection/Component Tests and General Diagnostics/Charging System Test)



3. Engine running, observe the scan tool ESC Battery Positive Voltage parameter.



4. Verify that the scan tool displays a value that is within 2 V of the battery terminal voltage.



Circuit/System Testing



1. Ignition OFF, disconnect the harness connector at the ESC module.



2. Ignition OFF, test for less than 5 Ohms between the ground circuit terminal 47 and ground.



瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.



3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 32 and ground.



瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



4. If all circuits test normal, replace the ESC module.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

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