2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 949

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 949

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.

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 2-20 ohm between the signal circuit terminal 4 and the low reference circuit terminal 6.

瀚慖f not within the specified range, test the circuits for a short to ground, an open/high resistance, or a short together. If the circuits test

normal, replace the power steering gear.

5. Test for 100-500 ohm between the signal circuit terminal 10 and the low reference circuit terminal 9.

瀚慖f not within the specified range, test the circuits for an open/high resistance, or a short together. If the circuits test normal, replace the

power steering gear.

6. Test for 300-1000 ohm between the signal circuit terminal 11 and the low reference circuit terminal 9.

瀚慖f not within the specified range, test the appropriate circuit for an open/high resistance, or a short together. If the circuits test normal,

replace the power steering gear.

7. Test for 50-200 ohm between the signal circuit terminal 12 and the low reference circuit terminal 9.

瀚慖f not within the specified range, test the circuits for an open/high resistance, or a short together. If the circuits test normal, replace the

power steering gear.

8. Test for 200-800 ohm between the signal circuit terminal 13 and the low reference circuit terminal 9.

瀚慖f not within the specified range, test the circuits for an open/high resistance, or a short together. If the circuits test normal, replace the

power steering gear.

9. Test for infinite resistance between the low reference terminal 6 and low reference terminal 9.

瀚慖f less than the specified value, test the circuits for a short together. If the circuits test normal, replace the power steering gear.

10. Test for greater than infinite resistance between the following circuits listed below and the EPS motor housing.

* Low reference terminal 9

* Low reference terminal 6

瀚慖f less than the specified range, test the appropriate circuit for a short to ground. If the circuits test normal, replace the power steering

gear.

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