AUTOMATIC TRANSMISSION SYSTEM Pattern Select Switch Circuit

DESCRIPTION

The pattern select switch makes it possible to select SPORT, Normal or SNOW modes.

The cowl side junction block ECU (main body ECU RH) receives pattern select switch information, and sends it through the multiplex communication system and CAN system to each ECU.

The SPORT signal changes control for the engine, automatic transmission, VDIM and electric power steering in an integrated manner.

When SPORT mode is selected, the SPORT indicator illuminates, VDIM SPORT mode is entered, and the electric power steering, automatic transmission control and engine control all change to SPORT mode.

When SNOW is selected, the operation of the throttle motor is moderated to control engine output. This helps to reduce skidding of the drive wheels, and assists with takeoff acceleration, driving straightness and turning stability.

WIRING DIAGRAM

A015YVYE01

Tech Tips


  • (*1) Pattern Select Switch (SNOW Switch)

    When the SNOW switch is pushed, the switch contact is made and the SNOW mode is selected.

    To cancel the SNOW mode, push the SNOW switch once again.

    The SNOW mode is automatically cancelled when the engine switch is turned off.

  • (*2) Pattern Select Switch (SPORT Switch)

    When the SPORT switch is pushed, the switch contact is made and the SPORT mode is selected.

    To cancel the SPORT mode, push the SPORT switch once again.

    The SPORT mode is automatically cancelled when the engine switch is turned off.

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND)


    1. Disconnect the connector of pattern select switch Click here.

    2. A0163FFE02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J36-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT PATTERN SELECT SWITCH ASSEMBLY


    1. A016054E02

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (E) - 6 (P)

      Press continuously pattern select switch

      (SPORT)

      		 Below 1 Ω

      Release pattern select switch

      (SPORT)

      		 10 kΩ or higher
      1 (E) - 3 (2ND)

      Press continuously pattern select switch

      (SNOW)

      		 Below 1 Ω

      Release pattern select switch

      (SNOW)

      		 10 kΩ or higher

    NG

    REPLACE PATTERN SELECT SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - MAIN BODY ECU)


    1. A0161UME19

      Connect the connector of pattern select switch.

    2. Disconnect the cowl side junction block (main body ECU RH) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J75-18 (PWR) - Body ground

      Press continuously pattern select switch

      (SPORT)

      		 Below 1 Ω

      Release pattern select switch

      (SPORT)

      		 10 kΩ or higher
      J75-17 (SNOW) - Body ground

      Press continuously pattern select switch

      (SNOW)

      		 Below 1 Ω

      Release pattern select switch

      (SNOW)

      		 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here