AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

When the ECO mode switch (combination switch assembly) is turned on, the air conditioning amplifier assembly receives an ECO switch ON signal and controls the air conditioning to enhance fuel efficiency.

WIRING DIAGRAM

A005AMME10

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Air Conditioner / Data Test.

    5. Check the values by referring to the table below.

      Air Conditioner
      Tester Display Measurement Item/Range Control Range Diagnostic Note
      ECO Switch

      ECO switch /

      OFF or ON

      ECO mode switch (combination switch assembly) not operated: OFF

      (when switch is not pressed)

      		 -

      ECO mode switch (combination switch assembly) operated: ON

      (when switch is pressed)
      OK
      ECO mode switch (combination switch assembly) condition displayed on the GTS changes with the actual switch operation.

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

  2. INSPECT ECO MODE SWITCH (COMBINATION SWITCH ASSEMBLY)


    1. Remove the ECO mode switch (combination switch assembly) Click here.

    2. A005E50E02
      Text in Illustration
      *a

      Component without harness connected

      ECO Mode Switch (Combination Switch Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L143-5 (ECU) - L143-3 (E)

      ECO mode switch (combination switch assembly) off

      (when switch is not pressed)

      		 10 kΩ or higher
      L143-5 (ECU) - L143-3 (E)

      ECO mode switch (combination switch assembly) on

      (when switch is pressed)

      		 Below 1 Ω

    NG

    REPLACE ECO MODE SWITCH (COMBINATION SWITCH ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (ECO MODE SWITCH (COMBINATION SWITCH ASSEMBLY) - AIR CONDITIONING AMPLIFIER)


    1. Disconnect the L17 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
      L17-15 (ECOS) - L143-5 (ECU) Always Below 1 Ω
      L17-15 (ECOS) - Body ground Always 10 kΩ or higher
      L17-14 (GND) - L143-3 (E) Always Below 1 Ω
      L17-14 (GND) - Body ground Always 10 kΩ or higher

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR