AUTOMATIC TRANSAXLE SYSTEM Pattern Select Switch Circuit

DESCRIPTION

ECT SNOW is the system that operates the throttle motor to control engine output to reduce skidding of the driving wheels, guarantee takeoff acceleration, driving straightness and turning stability.

WIRING DIAGRAM

A017BGXE07

INSPECTION PROCEDURE

PROCEDURE


  1. DRIVING TEST


    1. Start the engine.

    2. Turn the ECT SNOW switch "OFF" (Normal drive mode).

    3. Confirm vehicle response by driving from a parked position to fully depressing the accelerator pedal (*1).

    4. Turn the ECT SNOW switch "ON" and perform the same check as (*1).

      Confirm that there is a difference between ECT SNOW switch "ON" and "OFF".

      Tech Tips


      • Driving test should be done on a paved road (a nonskid road).

      • Make sure not to use the VSC system when testing a vehicle equipped with one.

      Standard
      There is a difference in acceleration between "ON" and "OFF".

    NG

    CHECK HARNESS AND CONNECTOR (NO. 1 PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND) Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

  2. CHECK HARNESS AND CONNECTOR (NO. 1 PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND)


    1. A017DREE02

      Disconnect the No. 1 pattern select switch (ECT SNOW switch) connector.

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

      Tech Tips

      The No. 1 pattern select switch connector has no terminals in locations of 1, 2, 7 and 8.

      Standard resistance
      Tester Connection Condition Specified Condition
      3 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT NO. 1 PATTERN SELECT SWITCH ASSEMBLY


    1. A017E2RE02

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

      Tech Tips

      The No. 1 pattern select switch connector has no terminals in locations of 1, 2, 7 and 8.

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      3 - 6 Press continuously Pattern select switch Below 1 Ω
      Release Pattern select switch 10 kΩ or higher

    NG

    REPLACE NO. 1 PATTERN SELECT SWITCH ASSEMBLY

    OK

  4. CHECK HARNESS AND CONNECTOR (NO. 1 PATTERN SELECT SWITCH ASSEMBLY - ECM)


    1. A017CW0E09

      Connect the No. 1 pattern select switch (ECT SNOW switch) connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      D32-27 (SNW1) - Body ground Press continuously Pattern select switch Below 1 Ω
      Release Pattern select switch 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE