Test K: The Blower Motor Is Inoperative - EMTC
PINPOINT TEST K: THE BLOWER MOTOR IS INOPERATIVE - EMTCNormal Operation
Under normal operation, the blower motor relay coil receives ignition voltage. The coil receives ground from the HVAC module - electronic manual temperature control (EMTC) through circuit 461 (OG) if any position but OFF is selected. Voltage is supplied to the relay switch contact. When the relay coil is energized, voltage is delivered to the blower motor through circuit 399 (BN/YE). Ground for the blower motor is provided through circuit 755 (BN/WH) from the blower resister or the blower switch (HI). The blower resister and blower switch is grounded through circuit 57 (BK).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Blower motor
- Blower motor switch
- Blower motor relay
- Central junction box (CJB)
K1-K2:
K3-K5:
K6-K8:
