AIR CONDITIONING SYSTEM(for Manual Air Conditioning System) ECO Switch Circuit

DTC Code DTC Name
ECO Switch Circuit

DESCRIPTION

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

WIRING DIAGRAM

E261769E21

PROCEDURE

  1. READ VALUE USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

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

    Body Electrical > Air Conditioner > Data List

    Tester Display

    Measurement Item

    Range

    Normal Condition

    Diagnostic Note

    ECO Switch

    Combination switch assembly (ECO mode switch)

    OFF or ON

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

    ON: Combination switch assembly (ECO mode switch) operated

    -

    Body Electrical > Air Conditioner > Data List

    Tester Display

    ECO Switch

    OK

    Combination switch assembly (ECO mode switch) condition displayed on the GTS changes with the actual switch operation.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  2. INSPECT COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH)

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

    2. Inspect the combination switch assembly (ECO mode switch).

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE COMBINATION SWITCH ASSEMBLY (ECO MODE SWITCH)

    • w/o Stop and Start System:Click here

    • w/ Stop and Start System:

    Click here

    OK

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

    1. Disconnect the G80 air conditioning amplifier assembly connector.

    2. Disconnect the G60*1 or G185*2 combination switch assembly (ECO mode switch) connector.

      • *1: w/o Stop and Start System

      • *2: w/ Stop and Start System

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

      Standard Resistance

      w/o Stop and Start System

      Tester Connection

      Condition

      Specified Condition

      G80-18 (ECOS) - G60-3 (ECU)

      Always

      Below 1 Ω

      G80-18 (ECOS) - Body ground

      Always

      10 kΩ or higher

      w/ Stop and Start System

      Tester Connection

      Condition

      Specified Condition

      G80-18 (ECOS) - G185-4 (ECU)

      Always

      Below 1 Ω

      G80-18 (ECOS) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. E340655C01

      *A

      w/o Stop and Start System

      *B

      w/ Stop and Start System

      *a

      Front view of wire harness connector

      (to Combination Switch Assembly [ECO Mode Switch])

      Disconnect the combination switch assembly (ECO mode switch) connector.

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

      Standard Resistance

      w/o Stop and Start System

      Tester Connection

      Condition

      Specified Condition

      G60-4 (MSW2) - Body ground

      Always

      Below 1 Ω

      w/ Stop and Start System

      Tester Connection

      Condition

      Specified Condition

      G185-6 (MSW2) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR