AUTOMATIC TRANSMISSION SYSTEM(for 3UR-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 pattern select switch, 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.

CAUTION / NOTICE / HINT

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

PROCEDURE

1. Click here

   INSPECT PATTERN SELECT (PWR) SWITCH

   
   
   1. 

      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 3 (P) - 16 (E) Pattern select (PWR) switch on Below 1 Ω 3 (P) - 16 (E) Pattern select (PWR) switch off 10 kΩ or higher

      Table 1. Text in Illustration

      *a	Component without harness connected (Suspension Control Switch)

   
   
   • OKClick here
   • NG

     REPLACE PATTERN SELECT (PWR) SWITCH (SUSPENSION CONTROL SWITCH) (Click here)

2. Click here

   CHECK HARNESS AND CONNECTOR (PATTERN SELECT (PWR) SWITCH - BODY GROUND)

   
   
   1. 

      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 V4-16 (E) - Body ground Always Below 1 Ω

      Table 2. Text in Illustration

      *a	Front view of wire harness connector (to Suspension Control Switch)

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

3. Click here

   CHECK HARNESS AND CONNECTOR (PATTERN SELECT (PWR) SWITCH - 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 A38-51 (PWR) - Body ground Pattern select (PWR) switch on Below 1 Ω A38-51 (PWR) - Body ground Pattern select (PWR) switch off 10 kΩ or higher

      Table 3. Text in Illustration

      *a	Front view of wire harness connector (to ECM)

   
   
   • OK

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

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR