Colorado 2WD V8-5.3L (2009)
Seat Heater: Symptom Related Diagnostic Procedures
Symptoms - Seat Heating and Cooling
Symptoms - Seat Heating and Cooling
Important: Review the system description in order to familiarize yourself with the system functions. Refer to Heated Seats Description and
Operation (See: Description and Operation).
Visual/Physical Inspection
*
Inspect for aftermarket devices which could affect the operation of the heated seat system. Refer to Checking Aftermarket Accessories (See:
Testing and Inspection/Component Tests and General Diagnostics).
*
Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections (
See: Testing and Inspection/Component Tests and General Diagnostics).
Symptom List
Refer to Heated Seat Inoperative (See: Heated Seat Inoperative) in order to diagnose the symptom.
Heated Seat Inoperative
Heated Seat Inoperative
Diagnostic Instructions
*
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.
*
Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
*
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
Battery voltage is supplied at all times to the heated seat module from the HTD/SEATS 20A fuse located in the underhood fuse block. Ignition voltage is
supplied to the heated seat switch from the PWR HTR SWITCH 20A fuse also located in the underhood fuse block. When the heated seat switch is in
either the HI or LO heat position, battery voltage is applied through the switch contacts, one of the internal resistors, and the switch signal circuit to the
heated seat module. In response to this signal, the heated seat module applies battery voltage through the heater element control circuit to the seat
cushion and seat back heater elements for heated seat operation.
Reference Information
Schematic Reference
Heated/Cooled Seat Schematics (See: Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Heated Seats Description and Operation (See: Description and Operation)
Electrical Information Reference
*
Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics)
*
Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics)
Circuit/System Verification
