2010 Cadillac CTS Sedan AWD V6-3.6L Page 753
* The ESC module senses the correct sensor supply voltage.
* The IPC clearing DTC feature.
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
Ignition ON, observe the scan tool Position Sensor Data parameters while the vehicle is jounced. The readings should vary between 0.35-4.75 volts.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at all 4 suspension position sensors.
2. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground at each sensor connector.
瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If all circuits test normal,
replace the ESC module.
瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ESC
module.
3. Test for less than.35 volts between the signal circuit terminal B and ground.
瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ESC module.
4. Reinstall each sensor one at a time. Test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground of the last sensor
connector to be connected.
瀚慖f the voltage is not within the specified range when one of the 3 sensors are connected, test or replace the suspect suspension position
sensor.
5. Test or replace the last remaining suspect suspension position sensor.
Component Testing
1. Install a 3A fused jumper wire between the 5-volt reference terminal A and 5 volts. Install a jumper wire between the low reference terminal
C and ground.
2. Sweep the suspension position sensor through the entire range while monitoring the voltage between the signal terminal B and the low
reference terminal C. The range should vary between 0.35-4.75 volts without any spikes or dropouts.
瀚慖f not within the specified range or if it is erratic, replace the applicable suspension position sensor.
Repair Instructions
* Electronic Suspension Front Position Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and
Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair/Electronic Suspension Front Position Sensor
Replacement)
* Electronic Suspension Rear Position Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Steering and
Suspension/Sensors and Switches - Suspension/Ride Height Sensor/Service and Repair/Electronic Suspension Rear Position Sensor
Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ESC module replacement, setup, and
