Test P: The Blower Motor Does Not Operate Correctly - EATC System
PINPOINT TEST P: THE BLOWER MOTOR DOES NOT OPERATE CORRECTLY - EATC SYSTEMNormal Operation
Under normal operation, the blower motor control module receives a 1-2 volt signal from the HVAC module - electronic automatic temperature control (EATC) through circuit CH218 (GN/VT) to determine the desired blower motor speed. The HVAC module - EATC receives a feedback voltage from the blower motor control module through circuit VH219 (GY) to determine actual blower motor speed. When the highest blower motor setting is selected, the HVAC module - EATC sends 12 volts to the blower control module through circuit CH217 (BN).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Blower motor control module
- HVAC module - EATC
P1-P2:
P2-P3:
P3-P4:
P4-P5:
P6-P8:
