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