B10E8 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B10E8 – Blower Motor Control Circuit

 

B10E8 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B10E8 Possible Causes

 

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

 

B10E8 Description

 

A 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.