Tuesday, April 2, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 136


B0083 3A, B0084 3A, B0085 3A, B0086 3A, B0087 3A, B0088 3A



* The SDM has received an ID message from the front end sensor, which does not match the ID stored in the SDM memory.



* The SDM has reset the front end sensor twice without detecting the correct ID message.



B0083 71, B0084 71, B0085 71, B0086 71, B0087 71, B0088 71



The SDM has received invalid serial data from the front end sensor.



Action Taken When the DTC Sets



* The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.



* The SIR System is disabled and no deployments are allowed.



Conditions for Clearing the DTC



* The condition for setting the DTC no longer exists.



* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.



Reference Information



Schematic Reference



SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)



Connector End View Reference



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



Description and Operation



SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/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)



* 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)



* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic



Procedures/Connector Repairs/Connector Repairs)



* 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 Testing



Important: Refer to SIR Service Precautions (See: Restraints and Safety Systems/Air Bag Systems/Service Precautions/Technician Safety



Information).



When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of



the affected component/connector:



* Front end sensor



* SDM module



* Front end sensor wiring harness connector



* SDM wiring harness connector



1. Ignition OFF, disconnect the harness connector at the appropriate sensor.



2. Disconnect the harness connector at the SDM.



3. Ignition ON, test for less than 1 volt between the following signal circuit and ground.



* Right front end sensor terminal 1



* Left front end sensor terminal 1



* Right front side impact sensor terminal B



* Left front side impact sensor terminal B



* Right rear side impact sensor terminal B



* Left rear side impact sensor terminal B

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