Friday, June 18, 2021

2010 Cadillac Truck SRX FWD V6-3.0L Page 250

2010 Cadillac Truck SRX FWD V6-3.0L Page 250



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 B0208 01



- Rear Blower Motor Speed Circuit Short to Battery



DTC B0208 06



- Rear Blower Motor Speed Circuit Low Voltage/Open



Circuit/System Description



The blower motor control module - auxiliary is an interface between the HVAC control module and the blower motor. The blower motor speed



control from the HVAC control module, battery positive and ground circuits enable the blower motor control module - auxiliary to operate. The



HVAC control module provides a pulse width modulation (PWM) signal to the blower motor control module - auxiliary in order to command the



blower motor speed. The blower motor control module - auxiliary transfers the PWM signal into a corresponding blower motor voltage. The



voltage resides between 2-13 V and changes linear to the height of the PWM signal.



Conditions for Running the DTC



* Ignition ON.



* The HVAC control module is ON.



Conditions for Setting the DTC



B0208 01



The voltage at the HVAC control module output to the blower motor control module - auxiliary is always high.



B0208 06



The voltage at the HVAC control module output to the blower motor control module - auxiliary is always low or floating.



Action Taken When the DTC Sets



The blower motor is inoperative.



Conditions for Clearing the DTC



The condition for setting the DTC is no longer present.



Reference Information



Schematic Reference



HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams)



Connector End View Reference



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



Description and Operation



Automatic HVAC Description and Operation (See: Heating and Air Conditioning/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

No comments:

Post a Comment