Normal Operation and Fault Conditions
When the blower motor relay coil receives a ground from the HVAC module, the relay coil is energized and voltage is delivered to the blower motor and the blower motor speed control from the relay. Ground for the motor is provided from the blower motor speed control. Ground is provided for the blower control module. The HVAC module sends a PWM signal to the blower motor speed control to control the blower speed.
DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B10B9:12 | Blower Control: Circuit Short to Battery | This CMDTC sets when the HVAC module senses a short to voltage on the relay coil ground circuit when the module is grounding the circuit. |