- Faulty Blower Motor Power Module
- Blower Motor Power Module harness is open or shorted
- Blower Motor Power Module circuit poor electrical connection
- Faulty A/C Heater Control
Tech notesB10E8-11-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO GROUND
B10E8-12-BLOWER MOTOR CONTROL - CIRCUIT SHORT TO BATTERY
B10E8-16-BLOWER MOTOR CONTROL - CIRCUIT VOLTAGE BELOW THRESHOLD
B10E8-17-BLOWER MOTOR CONTROL - CIRCUIT VOLTAGE ABOVE THRESHOLD
- Engine Light ON (or Service Engine Soon Warning Light)
B10e8 DescriptionA Blower Motor Power Module allows the microprocessor-based A/C Heater Control to calculate and provide infinitely variable blower motor speeds based upon either manual blower switch input or the ATC programming. The ATC blower motor control system uses a Pulse Width Modulated (PWM) circuit strategy. PWM voltage is applied to a comparator circuit which compares the PWM signal voltage to the blower motor feedback voltage. The resulting output drives the power module circuitry, which provides a linear output voltage to change or maintain the desired blower speed. If the A/C Heater Control detects a short to ground on the Blower Motor Control circuit. If a valid voltage is detected the DTC will change from active to stored and stay in the controllers memory for 100 consecutive ignition cycles.
B10E8 Information for specific makes
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