Wednesday, June 5, 2019

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 242


module.



4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct



Temp Sensor Actual parameter is less than -35锟斤拷C (-39锟斤拷F).



锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace



the HVAC control module.



5. If all circuits test normal, test or replace the appropriate temperature sensor.



Component Testing



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



2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table



for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.



锟斤拷 If not within the specified range, replace the sensor.



Repair Instructions



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



* Air Temperature Sensor Replacement - Upper Auxiliary (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Air Temperature Sensor Replacement - Upper Auxiliary)



* Duct Air Temperature Sensor Replacement - Upper Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Upper Right Side)



* Duct Air Temperature Sensor Replacement - Upper Left Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Upper Left Side)



* Air Temperature Sensor Replacement - Lower Auxiliary (Delphi) (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Air Temperature Sensor Replacement - Lower Auxiliary (Delphi))



* Duct Air Temperature Sensor Replacement - Lower Left Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Lower Left Side)



* Duct Air Temperature Sensor Replacement - Lower Right Side (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Duct Air Temperature Sensor Replacement - Lower Right Side)



* Ambient Air Temperature Sensor Replacement (See: Heating and Air Conditioning/Ambient Temperature Sensor / Switch HVAC/Service



and Repair)



* Inside Air Temperature Sensor Replacement (See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair)



* Auxiliary Inside Air Temperature Sensor Assembly Replacement (See: Heating and Air Conditioning/Discharge Air Temperature Sensor /



Switch/Service and Repair/Auxiliary Inside Air Temperature Sensor Assembly Replacement)



* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and



programming



B0560



DTC B0560



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.



DTC Descriptor



DTC B0560 08



- Tachometer Circuit Signal Invalid



Circuit/System Description



The amplifier receives a discrete engine speed signal from the engine control module. The high signal circuit is a pulse-width modulated signal from



the engine control module. The low signal circuit provides a ground reference for the amplifier. The amplifier uses the engine RPM signal and the



inputs from three headliner mounted microphones to determine the frequency of undesirable engine sounds in the vehicle cabin.



Conditions for Running the DTC



* Engine running, Radio ON



* Battery voltage between 9-16 volts.

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