Pattern Select Switch Circuit

A750F AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Circuit

Pattern Select Switch Circuit

DESCRIPTION

When 2nd start mode is selected with the pattern select switch, the ECM controls the solenoid valves and the transmission starts from 2nd gear.
In D position, the transmission automatically shifts up through 3rd to 5th as usual.
In 2 position, the transmission is held in 2nd gear.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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





(a) Disconnect the connector of the pattern select switch.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. INSPECT PATTERN SELECT SWITCH ASSEMBLY





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






NG -- REPLACE PATTERN SELECT SWITCH ASSEMBLY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH - ECM)





(a) Connect the connector of the pattern select switch.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE