Test M: The Blower Motor Is Inoperative - EMTC

PINPOINT TEST M: THE BLOWER MOTOR IS INOPERATIVE - EMTC

M1-M3:

M4-M6:

M6-M8:

M9-M10:

Normal Operation
Under normal operation, the blower motor relay coil receives ignition voltage through circuit CBP23 (BN/YE). The coil receives ground from the electronic manual temperature control (EMTC) module 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).

Possible Causes
- Fuse(s)
- An open in circuit CH430 (VT/OG), GD115 (BK/GY), CH402 (YE/GN), SBB04 (GN/RD), CH123 (VT/GN) or CBP23 (BN/YE)
- Blower motor
- Blower motor relay
- Blower motor switch