2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 945

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 945

Power Steering Schematics (See: Steering and Suspension/Steering/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Power Steering System Description and Operation (Hydraulic Power Steering) (See: Steering and Suspension/Steering/Description and

Operation/Power Steering System Description and Operation (Hydraulic Power Steering))Power Steering System Description and Operation (EPS)

(See: Steering and Suspension/Steering/Description and Operation/Power Steering System Description and Operation (EPS))

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

Engine running, then center the steering wheel, observe the scan tool Steering Wheel Position parameter, the reading should be 0 +/- 10 degrees.

If not within the specified range, perform the steering position torque sensor calibration, and verify DTC C0460 is not set as current.

Circuit/System Testing

Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal

Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure will perform the following tasks:

* Identify how to disable high voltage.

* Identify how to test for the presence of high voltage.

* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must

be followed.

Failure to follow the procedures exactly as written may result in serious injury or death.

Note: After verifying a circuit fault exists in the Power Steering Wiring Harness Extension Harness for Two Mode Hybrid. The wiring harness is

to be replaced and not repaired.

1. Perform the High Voltage Disabling () procedure.

2. Ignition OFF, connect the 12-volt battery.

3. Ignition OFF, disconnect the X3 harness connector at the PSCM.

4. Test for 3K-10K ohm between the low reference circuit terminal 1 and the signal circuit terminal 7.

瀚慖f not within the specified range, test the signal circuit and the low reference circuit for an open/high resistance or a short together. If the

circuits test normal, replace the power steering assist motor.

5. Test for 6K-20K ohm between the low reference circuit terminal 1 and the signal circuit terminal 8.

瀚慖f not within the specified range, test the signal circuit and the low reference circuit for an open/high resistance or a short together. If the

circuits test normal, replace the power steering assist motor.

6. Test for 10-200ohm between the low reference circuit terminal 1 and the 5V reference circuit terminal 3.

瀚慖f not within the specified range, test the 5V reference circuit and the low reference circuit for an open/high resistance or a short together.

If the circuits test normal, replace the power steering assist motor.

7. Test for greater than infinite resistance between the ground circuit terminal 3 and the EPS motor housing.