AIR CONDITIONING SYSTEM ECO Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

A01I4G1E18

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE 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 / 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 mode switch (eco switch assembly) /

      OFF or ON

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

      (when switch is not pressed)

      		 -

      ECO mode switch (eco switch assembly) operated: ON

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

    NG

    INSPECT ECO MODE SWITCH (ECO SWITCH ASSEMBLY) Click here

    OK

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

  2. INSPECT ECO MODE SWITCH (ECO SWITCH ASSEMBLY)


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

    2. A01I4NVE01
      Text in Illustration
      *a

      Component without harness connected

      (ECO Mode Switch (Eco Switch Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I49-4 (ECU) - I49-1 (E)

      ECO mode switch (eco switch assembly) off

      (when switch is not pressed)

      		 10 kΩ or higher
      I49-4 (ECU) - I49-1 (E)

      ECO mode switch (eco switch assembly) on

      (when switch is pressed)

      		 Below 1 Ω

    NG

    REPLACE ECO MODE SWITCH (ECO SWITCH ASSEMBLY) Click here

    OK

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


    1. Disconnect the I77 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
      I77-4 (ECOS) - I49-4 (ECU) Always Below 1 Ω
      I77-4 (ECOS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (ECO MODE SWITCH (ECO SWITCH ASSEMBLY) - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I49-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Click here