B10E8 - Blower Motor Control Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
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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

How do I fix code B10E8

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

B10E8-11-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

Cost of diagnosing the B10E8 code

Labor: 1.0

The cost of diagnosing the B10E8 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

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.
OBDII Code B10e8 - Blower Motor Control Circuit - AutoCodes.com

B10E8 More Information

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