2010 Cadillac Truck Escalade AWD V8-6.2L Page 989
* The ESC sends a message to the instrument panel cluster (IPC) to display SERVICE SUSPENSION SYSTEM message.
Conditions for Clearing the DTC
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
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, observe the scan tool Position Sensor Data parameters. The readings should vary between 0.35-4.75 volts while the vehicle is jounced.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the applicable suspension position sensor.
2. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal C and ground.
锟斤拷If greater than the specified range, test the low reference circuit for an open/high resistance. If circuit tests normal, replace the ESC
module.
3. Ignition ON, test for 4.75-5.25 volts between the 5 volt reference circuit terminal A and ground.
锟斤拷If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,
replace the ESC module.
锟斤拷If 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.
4. Verify the applicable scan tool position sensor parameter is less than 0.35 volts.
锟斤拷If greater than the specified range, test the signal circuit terminal B for a short to voltage. If all circuits test normal replace the ESC
module.
5. Install a 3A fused jumper wire between the signal circuit terminal B and the 5 volt reference circuit terminal A. Verify the scan tool position
sensor parameter is greater than 4.75 volts.
锟斤拷If less that the specified range, test the signal circuit for a short to ground or an open high resistance. If all circuits test normal replace the
ESC module.
6. If all circuits test normal, test or replace the applicable 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
