Blower Motor Malfunction

BLOWER MOTOR MALFUNCTION

TEST DESCRIPTION

Steps 1 - 9:

Steps 10 - 16:

The numbers below refer to the step numbers on the diagnostic table.
2. This step will determine if one or more blower speeds are inoperative.
4. This step determines if the instrument panel integration module (IPM) and blower motor control processor are attempting to control the blower motor speed.
6. The measured voltage on the blower speed control circuit should steadily decrease from 4.75 volts to 1.5 volts as the blower speed is adjusted from the minimum speed position to the maximum speed position.