Test R: The Auxiliary Blower Motor Is Inoperative
PINPOINT TEST R: THE AUXILIARY BLOWER MOTOR IS INOPERATIVENormal Operation
Under normal operation, the auxiliary blower motor relay 1 coil receives ignition voltage through circuit CBP46 (WH/BU). The coil receives ground from the HVAC module - dual automatic temperature control (DATC) or electronic manual temperature control (EMTC) module through circuit CH112 (VT/WH) if any auxiliary blower speed but OFF is selected. Voltage is supplied to the relay switch contact through circuit SBB11 (BU/RD). When the relay coil is energized, voltage is delivered to the blower motor through circuit CHA05 (BN/WH). Ground for the blower motor is provided through circuit CHA06 (YE/VT) from the blower motor resistor. The blower resistor is grounded through circuit GD151 (BK/GN).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Auxiliary blower motor
- Auxiliary blower motor relay 1
- Auxiliary blower motor resistor
- HVAC module - DATC
- HVAC module - EMTC
R1:
R1-R2:
R3-R5:
R5-R6:
