AUTOMATIC TRANSMISSION SYSTEM (for 1UR-FE) Pattern Select Switch Power Mode Circuit

DESCRIPTION

The ECM memory contains the programs for the normal and power shift patterns and lock-up pattern.

By following the programs corresponding to the signals from the No. 1 pattern select switch assembly, the park/neutral position switch and other various sensors, the ECM switches the shift solenoid valves on and off, and controls the transmission gear change and the lock-up clutch operation.

WIRING DIAGRAM

A01ES4OE09

INSPECTION PROCEDURE

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

PROCEDURE


  1. INSPECT NO. 1 PATTERN SELECT SWITCH ASSEMBLY (PWR)


    1. A01EQVDE01
      Text in Illustration
      *a

      Component without harness connected

      (No. 1 Pattern Select Switch Assembly)

      Remove the No. 1 pattern select 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
      4 (P) - 3 (E) Pattern select switch (PWR) on Below 1 Ω
      4 (P) - 3 (E) Pattern select switch (PWR) off 10 kΩ or higher

    NG

    REPLACE NO. 1 PATTERN SELECT SWITCH ASSEMBLY Click here

    OK

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


    1. A01EN4ME01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to No. 1 Pattern Select Switch Assembly)

      Disconnect the No. 1 pattern select switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      V5-3 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    A01ERA7E69
    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
      A53-51 (PWR) - Body ground Pattern select switch (PWR) on Below 1 Ω
      A53-51 (PWR) - Body ground Pattern select switch (PWR) off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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