CLIMATE CONTROL SEAT SYSTEM Climate Control System does not Operate on Rear Right Side

DESCRIPTION

The rear seat climate control ECU RH receives rear power seat switch position signals when the engine switch is on (IG), and then transmits airflow amount signals to each seat climate blower.

WIRING DIAGRAM

B006NM8E16

CAUTION / NOTICE / HINT

Tech Tips

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE


  1. CHECK CLIMATE CONTROL SEAT OPERATION


    1. Check the climate control seat operation.

      Click here

      Result
      Result Proceed to
      Only seat climate control blower assembly RH does not operate A
      Only seat back climate control blower RH does not operate B
      Both climate control blowers do not operate C

    A

    REPLACE REAR SEAT CLIMATE CONTROL BLOWER RH Click here

    C

    CHECK HARNESS AND CONNECTOR (REAR SEAT CLIMATE CONTROL ECU RH - BATTERY AND BODY GROUND) Click here

    B

  2. CHECK HARNESS AND CONNECTOR (REAR SEAT CLIMATE CONTROL BLOWER RH - REAR SEAT BACK CLIMATE CONTROL BLOWER RH)


    1. Disconnect the Y5 rear seat climate control blower RH connector.

    2. Disconnect the Q1 rear seat back climate control blower RH connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y5-3 (IGB) - Q1-1 (IGB) Always Below 1 Ω
      Y5-3 (IGB) or Q1-1 (IGB) - Body ground Always 10 kΩ or higher
      Y5-4 (VS) - Q1-2 (VS) Always Below 1 Ω
      Y5-4 (VS) or Q1-2 (VS) - Body ground Always 10 kΩ or higher
      Y5-2 (GND2) - Q1-3 (GND2) Always Below 1 Ω
      Y5-2 (GND2) or Q1-3 (GND2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK REAR SEAT BACK CLIMATE CONTROL BLOWER RH


    1. Temporarily replace the rear seat back climate control blower RH with a new or normally functioning one.

      Click here

    2. Check the climate control seat operation.

      Click here

      OK
      Climate control seat system is operated normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (REAR SEAT BACK CLIMATE CONTROL BLOWER RH WAS DEFECTIVE)

    NG

    REPLACE REAR SEAT CLIMATE CONTROL BLOWER RH Click here

  4. CHECK HARNESS AND CONNECTOR (REAR SEAT CLIMATE CONTROL ECU RH - BATTERY AND BODY GROUND)


    1. Disconnect the Y4 rear seat climate control ECU RH connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      Y4-13 (+B) - Body ground Always 11 to 14 V
      Y4-12 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y4-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR SEAT CLIMATE CONTROL BLOWER RH - BATTERY AND BODY GROUND)


    1. Disconnect the Y5 rear seat climate control blower RH connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Y5-1 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y5-6 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (REAR SEAT CLIMATE CONTROL ECU RH - REAR SEAT CLIMATE CONTROL BLOWER RH)


    1. Disconnect the Y4 rear seat climate control ECU RH connector.

    2. Disconnect the Y5 rear seat climate control blower RH connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y4-26 (BLWM) - Y5-5 (SI) Always Below 1 Ω
      Y4-26 (BLWM) or Y5-5 (SI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK REAR SEAT CLIMATE CONTROL ECU RH


    1. B006MBSC02
      *a

      Component with harness connected

      (Rear Seat Climate Control ECU RH)

      Reconnect the Y4 rear seat climate control ECU RH connector.

    2. Reconnect the Y5 rear seat climate control blower RH connector.

    3. Check for pulses according to the condition(s) in the table below.

      Measurement Condition
      Tester Connection Condition Specified Condition
      Y4-26 (BLWM) - Body ground

      • Engine switch on (IG)

      • Heated and ventilated seat main switch on and set to seat blower position

      		 Pulse generation
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR SEAT CLIMATE CONTROL BLOWER RH Click here

    NG

  8. INSPECT REAR POWER SEAT SWITCH RH


    1. Remove the rear power seat switch RH.

      Click here

    2. Inspect the rear power seat switch RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR POWER SEAT SWITCH RH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (REAR POWER SEAT SWITCH RH - REAR SEAT CLIMATE CONTROL ECU RH)


    1. Disconnect the Y8 rear power seat switch RH connector.

    2. Disconnect the Y4 rear seat climate control ECU RH connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Y8-13 (RHTR) - Y4-7 (HSWM) Always Below 1 Ω
      Y8-13 (RHTR) or Y4-7 (HSWM) - Body ground Always 10 kΩ or higher
      Y8-9 (RVS5) - Y4-19 (HSW5) Always Below 1 Ω
      Y8-9 (RVS5) or Y4-19 (HSW5) - Body ground Always 10 kΩ or higher
      Y8-10 (RVSS) - Y4-18 (HSWS) Always Below 1 Ω
      Y8-10 (RVSS) or Y4-18 (HSWS) - Body ground Always 10 kΩ or higher
      Y8-11 (RVSG) - Y4-20 (HSWG) Always Below 1 Ω
      Y8-11 (RVSG) or Y4-20 (HSWG) - Body ground Always 10 kΩ or higher
      Y8-22 (RGND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE REAR SEAT CLIMATE CONTROL ECU RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR