Escalade 4WD V8-6.0L Hybrid (2011)
Seat Heater: Testing and Inspection
Heated Seat Inoperative - Rear
Heated Seat Inoperative - Rear
Diagnostic Instructions
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Perform the Diagnostic System Check - Vehicle See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle prior to using this diagnostic procedure.
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Review Strategy Based Diagnosis See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis for an
overview of the diagnostic approach.
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Diagnostic Procedure Instructions See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
Circuit/System Description
The left and right rear passenger heated seats are controlled by separate heated seat switches located in the auxiliary heater and air conditioning control
module. The heated seats operate in the high and low modes for the seat cushion only. When a heated seat switch is pressed, the auxiliary heater and air
conditioning control module illuminates appropriate switch indicators and sends a serial data message to the rear heated seat module (RHSM) indicating
the heated seat request. The RHSM then determines the mode of operation and turns the heated seat system ON or OFF.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics See: Diagrams/Electrical Diagrams
Connector End View Reference
Component Connector End Views See: Diagrams/Connector Views/Connector End Views By Name
Description and Operation
Heated Seats Description and Operation
Electrical Information Reference
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Circuit Testing See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing
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Connector Repairs See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs
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Testing for Intermittent Conditions and Poor Connections See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs
Scan Tool Reference
Control Module References See: Testing and Inspection/Programming and Relearningfor scan tool information
Circuit/System Verification
1. Engine running, observe the scan tool Rear HVAC/RSA parameters listed below while pressing and releasing the appropriate heated seat switch.
The reading should change between Inactive and Active and the appropriate switch indicators should illuminate.
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Left Rear Heated Seat Switch
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Right Rear Heated Seat Switch
‹› If not the specified values, replace the auxiliary heater and air conditioning control module.
‹› If the scan tool parameters test normal, but, the switch indicators do not illuminate, replace the auxiliary heater and air conditioning control
module.
2. If all scan tool parameters test normal and there are no DTCs set, replace the RHSM.
Repair Instructions
Perform the Diagnostic Repair Verification See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Trouble
Code Tests and Associated Procedures/Verification Tests and Procedures after completing the diagnostic procedure.
Control Module References See: Testing and Inspection/Programming and Relearningfor RHSM and auxiliary heater and air conditioning control
module replacement, setup, and programming