Saturday, June 8, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 482


The module detects that the set point temperature has not been reached within 8.5 minutes.



B1935 0B, B1935 0E, B2180 0B, or B2180 0E



By measuring output current, the module calculates that the heating element resistance is below the minimum resistance.



B1935 0C, B1935 0D, B2180 0C, or B2180 0D



By measuring output current, the module calculates that the heating element resistance is above the maximum resistance.



B1935 1F or B2180 1F



The temperature sensor voltage is erratic or changes suddenly.



Action Taken When the DTC Sets



The heated seat back function for the affected seat will be disabled.



Conditions for Clearing the DTC



* The current DTC clears when the malfunction is no longer present and the power mode changes to OFF then back to ACC or RUN.



* The history DTC will clear after 50 consecutive fault-free ignition cycles have occurred.



Reference Information



Schematic Reference



Heated/Cooled Seat Schematics ()



Connector End View Reference



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



Description and Operation



Heated Seats Description and Operation (KA1) ()Heated Seats Description and Operation (KA6) ()



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)



Scan Tool Reference



Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information



Circuit/System Verification



Verify the type of vehicle and the heated seat system for which the DTC set.



If the DTC set in a vehicle equipped with memory, refer to Circuit/System Testing below.



If the DTC set in a hybrid vehicle without memory, refer to DTC B1935 or B2180 (HP2 w/o memory).



If the DTC set in a non-hybrid vehicle without memory, refer to DTC B1935 or B2180 (Dealer installed).



Circuit/System Testing



B1935 0A, B1935 0B, B1935 0C, B1935 0D, B1935 0E, B1935 04, or B1935 1F



1. Ignition OFF, disconnect the X3 harness connector at the MSM.



2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.



锟斤拷 If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.



3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the X1 harness connector at the MSM.



Important: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat



unoccupied, then with the seat occupied.

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