Yukon Denali 2WD V8-6.0L Hybrid (2010)
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Seat Back Heat Mode Sw.
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Seat Heat Mode Sw.
‹› If not the specified values, refer to the Heated Seat Switch component test. If the heated seat switch tests normal, test or replace the appropriate
door lock/window switch.
2. If all scan tool parameters test normal and there are no DTCs set, replace the MSM/HSM.
3. If all heated seat functions operate normal and the heated seat switch indicators do not illuminate, refer to the Heated Seat Switch Indicators
component test.
Component Testing
Heated Seat Switch
1. Ignition OFF, disconnect the X4 harness connector at the door lock/window switch.
2. Test for infinite resistance between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the open position.
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Seat back and cushion heat mode terminal 6
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Seat back only mode terminal 7
‹› If not the specified value, replace the heated seat switch.
3. Test for less than 2 Ohms between the signal circuits listed below and the low reference circuit terminal 4 with the switch in the closed position.
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Seat back and cushion heat mode terminal 6
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Seat back only mode terminal 7
‹› If greater than the specified range for any of the tests, replace the heated seat switch.
Heated Seat Switch Indicators
1. Ignition OFF, disconnect the X4 harness connector at the door lock/window switch.
2. Connect a 3 A fused jumper wire between the low reference circuit terminal 4 and ground.
3. Connect a test lamp between B+ and each control circuit listed below. The appropriate indicator should illuminate.
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Seat back and cushion mode indicator terminal 10
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Seat back only mode indicator terminal 11
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Low heat indicator terminal 9
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Medium heat indicator terminal 1
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High heat indicator terminal 2
‹› If any indicator does not illuminate, replace the heated seat switch.
4. If all indicators illuminate, replace the door lock/window switch.
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.
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Front Seat Heater Switch Replacement (See: Seat Heater Switch/Service and Repair/Front Seat Heater Switch Replacement)
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Control Module References (See: Testing and Inspection/Programming and Relearning) for MSM, HSM and driver or passenger door
lock/window switch replacement, programming, and setup
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.
