2010 Cadillac CTS Sedan AWD V6-3.6L Page 770

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.