2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 989

2010 Cadillac Truck Escalade EXT 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.

瀚慖f 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.

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 the circuit tests 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.

4. Verify the applicable scan tool position sensor parameter is less than 0.35 volts.

瀚慖f 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.

瀚慖f 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