Tuesday, April 16, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 701


* The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.



* The history DTC will clear after 50 consecutive ignition cycles without a fault present.



Reference Information



Schematic Reference



Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Wiper/Washer System Description and Operation (See: Wiper and Washer Systems/Description and Operation/Wiper/Washer System 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)



* 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



Ignition ON, wiper switch in the HIGH position. Verify the windshield wipers are cycling at the high speed.



Circuit/System Testing



1. Ignition OFF, disconnect the X5 harness connector at the BCM.



2. Install a 10A fused jumper wire between the WIPER 1 relay control circuit terminal 20 and B+.



3. Ignition ON, verify that the high speed wipers are not on.



锟斤拷 If the high speed wipers are on, test the WIPER 2 relay control circuit terminal 21 for a short to ground. If the circuit tests normal, replace



the underhood fuse block.



4. Install a 10A fused jumper wire between the WIPER 2 relay control circuit terminal 21 and ground. Verify the high speed wipers are on.



锟斤拷 If the low speed wipers are not on, test the relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal



replace the underhood fuse block.



5. If all circuits test normal, replace the BCM.



Repair Instructions



Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.



* Underhood Electrical Center or Junction Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and



Repair/Removal and Replacement/Underhood Electrical Center or Junction Block Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming



B3884



DTC B3884



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.

No comments:

Post a Comment