LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning System - Diagnostic Codes & Circuit Tests - (Hybrid) >> Air Conditioning System >> Circuit Tests >> Rear Blower Motor Circuit [02/2014 - ] >> Procedure

Rear Blower Motor Circuit [02/2014 - ]: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Air Conditioner / Active Test.
    5. Check the operation by referring to the table below.

      Body Electrical > Air Conditioner > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Rear Blower Motor Rear blower motor with fan sub-assembly Min.: 0
      Max.: 31      		 -

      Body Electrical > Air Conditioner > Active Test 

      Tester Display
      Rear Blower Motor

      Result

      Result Proceed to
      OK A
      NG (Rear blower motor with fan sub-assembly does not operate) B
      NG (Rear blower motor with fan sub-assembly operates but does not change speed) C

    Result:  1

    A 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [02/2014 - 11/2016]  Refer to  PROBLEM SYMPTOMS TABLE [11/2016 - ] 

    Result:  3

    C 

    See step  9

    Result:  2

    B 

    See step  2

  2. INSPECT REAR BLOWER MOTOR WITH FAN SUB-ASSEMBLY 
    1. Disconnect the L18 rear blower motor with fan sub-assembly connector.
    2. Connect a positive (+) lead from the auxiliary battery to terminal 2 and a negative (-) lead to terminal 1, and check that the motor operates.
      GTY424007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Rear Blower Motor with Fan Sub-assembly)

      OK

      The rear blower motor with fan sub-assembly operates smoothly.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE REAR BLOWER MOTOR WITH FAN SUB-ASSEMBLY. Refer to  REMOVAL [02/2014 - 11/2015]  Refer to  REMOVAL [11/2015 - ] 

    Result:  1

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - BODY GROUND) 
    1. Disconnect the L19 blower motor control connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L19-6 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AUXILIARY BATTERY) 
    1. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      L19-1 (+B) - Body ground Power switch off 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - REAR BLOWER MOTOR WITH FAN SUB-ASSEMBLY) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L19-2 (VM) - L18-2 Always Below 1 Ω
      L19-2 (VM) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (REAR BLOWER MOTOR WITH FAN SUB-ASSEMBLY - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      L18-1 - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (BLOWER MOTOR CONTROL - AIR CONDITIONING AMPLIFIER ASSEMBLY) 
    1. Disconnect the F81 air conditioning amplifier assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F81-26 (BLWH) - L19-3 (SI) Always Below 1 Ω
      F81-26 (BLWH) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  1

    OK 

    See step  8

  8. INSPECT BLOWER MOTOR CONTROL 
    1. Reconnect the L19 blower motor control connector.
    2. Measure the voltage according to the value(s) in the table below.
      GTY454315Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Air Conditioning Amplifier Assembly)

      Standard Voltage

      Tester Connection Condition Specified Condition
      F81-26 (BLWH) - Body ground Always 6.0 to 7.0 V

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE BLOWER MOTOR CONTROL. Refer to  REMOVAL [02/2014 - 11/2015]  Refer to  REMOVAL [11/2015 - ] 

    Result:  1

    OK 

    See step  9

  9. INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY 
    1. Reconnect the F81 air conditioning amplifier assembly connector.
    2. Turn the power switch on (IG).
    3. Turn the rear blower switch on (LO).
    4. Measure the waveform between terminal F81-26 (BLWH) of the air conditioning amplifier assembly and body ground.
      GTY436390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component with harness connected
      (Air Conditioning Amplifier Assembly)

      OK

      Waveform is similar to that shown in the illustration.

      HINT: 

      The waveform varies with the blower level.

      Item Content
      Tool Setting 2 V/DIV., 500 μs./DIV.
      Vehicle Condition
      • Power switch on (IG)
      • Rear blower switch: LO

      Result

      Proceed to
      OK
      NG

    Result:  1

    OK 

    REPLACE BLOWER MOTOR CONTROL. Refer to  REMOVAL [02/2014 - 11/2015]  Refer to  REMOVAL [11/2015 - ] 

    Result:  2

    NG 

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [02/2014 - ] 

scientia non olet · About LEMON Manuals