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Home >> Mazda >> 2011 >> Tribute 4WD L4-2.5L Hybrid >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test 13: The Blower Motor Does Not Operate Correctly
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Pinpoint Test 13: The Blower Motor Does Not Operate Correctly




PINPOINT TEST 13: THE BLOWER MOTOR DOES NOT OPERATE CORRECTLY - HYBRID

Refer to the Tribute Wiring Diagrams for schematic and connector information.

Normal Operation

Under normal operation, the relay coil and switch is supplied voltage. 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 from the blower motor speed control. The HVAC module sends a Pulse Width Modulation (PWM) signal to the blower motor speed control to control the blower speed.

- DTC B10B9:12 (Blower Control: Circuit Short to Battery) - The module senses excessive voltage on the blower motor control PWM circuit, indicating a short directly to voltage.

Possible Causes
- Fuse(s)
- Wiring, terminals or connectors
- Blower motor speed control
- HVAC module

Diagnostic Procedure









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