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

DESCRIPTION

When 2nd 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 3rd to 5th as usual.

WIRING DIAGRAM

Refer to Pattern Select Switch Power Mode Circuit Click here.

CAUTION / NOTICE / HINT

When the pattern select (2ND) switch is pushed, switch contact is made and 2nd mode is selected. To cancel 2nd mode, push the pattern select (2ND) switch once again.

Tech Tips

2nd mode is automatically canceled when the engine switch is turned off.

PROCEDURE


  1. DRIVING TEST

    Tech Tips

    The driving test should be performed on a paved road (nonskid road).


    1. Start the engine.

    2. Turn the 2ND switch off (normal drive mode).

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

    4. Turn the 2ND switch on and perform the same check as above.

      When driving the vehicle with the 2ND switch on and off, check that there is a difference in acceleration.

      OK
      There is a difference in acceleration.

    OK

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

    NG

  2. INSPECT PATTERN SELECT (2ND) SWITCH


    1. A01X8ZTE16
      Text in Illustration
      *a

      Component without harness connected

      (Suspension Control Switch)

      Remove the suspension control switch Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      17 (2ND) - 20 (E) Pattern select (2ND) switch continuously pressed Below 1 Ω
      17 (2ND) - 20 (E) Pattern select (2ND) switch released 10 kΩ or higher

    NG

    REPLACE PATTERN SELECT (2ND) SWITCH (SUSPENSION CONTROL SWITCH) Click here

    OK

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


    1. A01X202E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Suspension Control Switch)

      Disconnect the suspension control switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V4-20 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01X0KCE02
    Text in Illustration
    *a

    Front view of wire harness connector

    (to ECM)

    1. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A38-4 (SNWI) - Body ground Pattern select (2ND) switch continuously pressed Below 1 Ω
      A38-4 (SNWI) - Body ground Pattern select (2ND) switch released 10 kΩ or higher

    OK

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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR