Test O: The Blower Motor Is Inoperative - EATC System
PINPOINT TEST O: THE BLOWER MOTOR IS INOPERATIVE - EATC SYSTEMNormal Operation
Under normal operation, the blower motor relay coil receives a ground through circuit GD120 (BK/GN). The coil receives voltage from the HVAC module - electronic automatic temperature control (EATC) through circuit CH123 (VT/GN) when the HVAC module - EATC is ON. Voltage is supplied to the relay contacts from circuit SBB16 (VT/RD). When the relay coil is energized, voltage is delivered to the blower motor through circuit CH402 (YE/GN). Ground for the motor is provided through circuit VH301 (YE/BU) from the blower control module. Ground for the blower control module is provided by circuit GD140 (BK/GN).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Blower motor control module
- HVAC module - EATC
- Blower motor relay
- Blower motor
O1-O3:
O3-O5:
O6-O8:
O8 Continued:
O9:
O10-O11:
O11-O12:
O12 Continued:
