Thursday, June 27, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 149


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



锟斤拷 If greater than the specified range, test the circuit for a short to voltage.



4. Ignition ON, test for less than 1 volt between the low reference circuit and ground.



* Right front end sensor terminal 2



* Left front end sensor terminal 2



* Right front side impact sensor terminal A



* Left front side impact sensor terminal A



* Right rear side impact sensor terminal A



* Left rear side impact sensor terminal A



锟斤拷 If greater than the specified range, test the circuit for a short to voltage.



5. Test for infinite resistance between the 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

No comments:

Post a Comment