AUTOMATIC TRANSMISSION SYSTEM (for 1GR-FE) Pattern Select Switch 2nd Start Mode Circuit

DESCRIPTION

When 2nd start mode is selected with the pattern select (2ND) switch, the ECM controls the solenoid valves and the transmission starts from 2nd gear.

The 2nd mode is the system that operates the throttle motor to control engine output to reduce skidding of the driving wheels, and guarantee takeoff acceleration, driving straightness and turning stability.

When the shift lever is in D, the transmission automatically shifts up through 2nd to 5th as usual.

Tech Tips


  • The pattern select (2ND) switch is a momentary-type switch.

  • In order to cancel 2nd mode, push the pattern select (2ND) switch again or turn the ignition switch off.

WIRING DIAGRAM

A01DMS5E05

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT PATTERN SELECT (2ND) SWITCH ASSEMBLY


    1. A01DM5PE03
      Text in Illustration
      *a

      Component without harness connected

      (Pattern Select (2ND) Switch Assembly)

      Remove the pattern select (2ND) switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      1 (E) - 4 (2ND) Pattern select (2ND) switch pushed Below 1 Ω
      1 (E) - 4 (2ND) Pattern select (2ND) switch not pushed 10 kΩ or higher

    NG

    REPLACE PATTERN SELECT (2ND) SWITCH ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (PATTERN SELECT (2ND) SWITCH - BODY GROUND)


    1. A01DSPFE12
      Text in Illustration
      *a

      Front view of wire harness connector

      (Pattern Select (2ND) Switch Assembly)

      Disconnect the G159 pattern select (2ND) switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G159-1 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (PATTERN SELECT (2ND) SWITCH - ECM)


    1. A01DNT0E09
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to ECM)

      Disconnect the G55 ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      G55-21 (SNWI) - Body ground Pattern select (2ND) switch pushed Below 1 Ω
      G55-21 (SNWI) - Body ground Pattern select (2ND) switch not pushed 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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