Blower Motor Malfunction - Auxiliary

BLOWER MOTOR MALFUNCTION - AUXILIARY

TEST DESCRIPTION

Step 1 - Step 9:

Step 10 - Step 14:

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.
3. This step determines if the HVAC control module and auxiliary blower motor control processor are attempting to control the auxiliary blower motor speed.
5. The measured voltage on the auxiliary blower speed control circuit should steadily increase from 0-8 volts as the auxiliary blower speed is adjusted from the minimum speed position to the maximum speed position.