Test M: The Blower Motor Does Not Operate Correctly - EMTC
PINPOINT TEST M: THE BLOWER MOTOR DOES NOT OPERATE CORRECTLY - EMTCNormal Operation
Under normal operation, the blower motor is provided ground from the blower resistor through circuit CH430 (VT/OG). The resistor gets a ground from circuit GD112 (BK/GN) in the lowest blower setting. In MED-LO and MED-HI the resistor gets ground from the blower motor switch through circuit CH428 (GN/WH) or CH429 (GY/BN), depending on selected speed. In HI, the blower motor is grounded directly through the blower motor switch from circuit CH430 (VT/OG) to circuit GD112 (BK/GN). The blower switch receives its ground from circuit GD112 (BK/GN).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Blower motor resistor
- Blower motor switch
M1-M3:
M3-M4:
M5-M8:
M8-M9:
