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Blower Motor Control Relay: Inspection

  1. REMOVE GLOVE COMPARTMENT DOOR (See  REMOVAL  ) 
  2. REMOVE BLOWER MOTOR CONTROL RELAY 
    1. Disconnect the connectors.
    2. Remove the screw and blower motor control relay.
      Fig 1: Removing Screw And Blower Motor Control Relay
      G02945908Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT BLOWER MOTOR CONTROL CIRCUIT 

    Inspect the wire harness side connector from the back side, as shown in the chart.

    Test conditions:

    • Turn ignition switch to ON
    • Operate blower motor (High blower speed)
    TERMINALS STANDARD VALUE

    Terminals Standard Value
    GND <--> Body Ground Continuity
    +B <--> Body Ground Battery positive voltage
    +M <--> Body Ground Battery positive voltage
    M+ <--> M- Battery positive voltage
    SI <--> Body Ground 1-3 V

    If resistance is not as specified, replace the blower motor control relay.

    Fig 2: Inspecting Wire Harness Side Connector From Back Side
    G02945909Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL BLOWER MOTOR CONTROL RELAY 
    1. Install the blower motor control relay with the screw.
    2. Connect the connectors.
      3. Fig 3: Installing Blower Motor Control Relay With Screw
      G02945910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL GLOVE COMPARTMENT DOOR (See  INSTALLATION  ) 
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