Test M: The Blower Motor Is Inoperative - EMTC
PINPOINT TEST M: THE BLOWER MOTOR IS INOPERATIVE - EMTCNormal Operation
Under normal operation, the blower motor relay coil receives ignition voltage through circuit CBP23 (BN/YE). The coil receives ground from the HVAC module - electronic manual temperature control (EMTC) through circuit CH123 (VT/GN) if any function selector position but OFF is selected. Voltage is supplied to the relay switch contact through circuit SBB04 (GN/RD). When the relay coil is energized, voltage is delivered to the blower motor through circuit CH402 (YE/GN). Ground for the blower motor is provided through circuit CH430 (VT/OG) from the blower resistor or the blower switch (HI). The blower resistor and blower switch are grounded through circuit GD115 (BK/GY).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Blower motor
- HVAC module - EMTC
- Blower motor relay
- Blower motor switch
M1-M2:
M3-M5:
M6-M8:
