2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3157

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 3157

does not allow removal of the SDGM, only access to the connector. Refer to Instrument Panel Center Trim Panel Replacement (Cadillac) (

See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument Panel/Service and Repair/Instrument Panel Center Trim Panel

Replacement (Cadillac))Instrument Panel Center Trim Panel Replacement (Except Cadillac) (See: Body and Frame/Interior Moulding /

Trim/Dashboard / Instrument Panel/Service and Repair/Instrument Panel Center Trim Panel Replacement (Except Cadillac)).

* Circuits to the HPCM are diagnosed only to the PIM connector because the HPCM is replaced as part of the PIM.

* Different DTCs may set in different modules along with this DTC depending on where the fault occurs and the vehicle operating conditions

when the fault occurs.

Reference Information

Schematic Reference

* Data Communication Schematics (See: Powertrain Management/Computers and Control Systems/Information Bus/Diagrams/Electrical

Diagrams)

* Control Module References (See: Testing and Inspection/Programming and Relearning)

Connector End View Reference

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

Description and Operation

Data Link Communications Description and Operation (See: Powertrain Management/Computers and Control Systems/Information

Bus/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)

Circuit/System Verification

With a scan tool, ensure the following DTCs are not present in the modules as follows:

* BCM - U1814

* HPCM - U1812

* SDGM - B137A or U209A

If any listed DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle) to diagnose that DTC prior to this diagnostic.

Circuit/System Testing

1. Ignition OFF, disconnect harness connector X1 of the APM.

2. Test for less than 0.5 volts between the wake up signal circuit terminal 3 and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the SDGM.

3. Disconnect harness connector X1 of the PIM.

4. Test for B+ between the wake up signal circuit terminal 19 and ground.

瀚慖f less than the specified value, test the circuit for an open/high resistance. If the circuit tests normal, replace the SDGM.

5. Test for less than 1.0 ohm between the APM and the PIM on the following circuit terminals.

* PTLAN + APM terminal 2 and PIM terminal 25

* PTLAN - APM terminal 1 and PIM terminal 24

瀚慖f greater than the specified range, test the circuit for an open/high resistance.

6. Ignition OFF, disconnect harness connector X3 of the engine control module (ECM).

7. Test for less than 1.0 ohm between the APM and the ECM on the following circuit terminals.

* PTLAN + APM terminal 11 and ECM terminal 53

* PTLAN - APM terminal 10 and ECM terminal 33

瀚慖f greater than the specified range, test the circuit for an open/high resistance.