Test L: The Blower Motor Is Inoperative - EMTC
PINPOINT TEST L: THE BLOWER MOTOR IS INOPERATIVE - EMTCNormal Operation
Under normal operation, the blower motor relay coil receives ignition voltage through circuit CBP45 (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 CH402 (YE/GN). When the relay coil is energized, voltage is delivered to the blower motor through circuit CH402 (YE/GN)/(BK). Ground for the blower motor is provided through circuit CH430 (VT/OG)/(BK/RD) from the blower resistor or the blower switch (HI). The blower resistor and blower switch are grounded through circuit GD116 (BK/VT).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- HVAC module - EMTC
- Blower motor
- Blower motor relay
- Blower motor switch
L1:
L1-L4:
L4-L6:
L6 Continued:
L7:
L8-L9:
