2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 947

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 947

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 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.

Important: After verifying a circuit fault exists in the Power Steering Assist Motor Wiring Harness for Two Mode Hybrid, the Power

Steering Assist Motor 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 harness connector at the PSCM.

4. Test for less than 1 ohm between the following circuits listed below.

* Control circuit terminal 2 and control circuit terminal 1

* Control circuit terminal 1 and control circuit terminal 3

* Control circuit terminal 2 and control circuit terminal 3

瀚慖f greater than the specified range, replace the power steering assist motor.

5. Test for greater than infinite resistance between the following circuits listed below and the power steering motor housing.

* Control circuit terminal 2

* Control circuit terminal 1

* Control circuit terminal 3

瀚慖f less than the specified range, replace the power steering assist motor.

6. If all circuits test normal, test or replace the PSCM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Power Steering Assist Motor Replacement (See: Steering and Suspension/Steering/Power Steering/Power Steering Motor/Service and

Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for PSCM replacement, setup, and programming