Pattern Select Switch Circuit

AA80E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Circuit

Pattern Select Switch Circuit

DESCRIPTION

The pattern select switch makes it possible to select SPORT, Normal or SNOW modes.
The cowl side junction block ECU (main body ECU RH) receives pattern select switch information, and sends it through the multiplex communication system and CAN system to each ECU.
The SPORT signal changes control for the engine, automatic transmission, VDIM and electric power steering in an integrated manner.
When SPORT mode is selected, the SPORT indicator illuminates, VDIM SPORT mode is entered, and the electric power steering, automatic transmission control and engine control all change to SPORT mode.
When SNOW is selected, the operation of the throttle motor is moderated to control engine output. This helps to reduce skidding of the drive wheels, and assists with takeoff acceleration, driving straightness and turning stability.

WIRING DIAGRAM





HINT:
- *1: Pattern Select Switch (SNOW Switch)
When the SNOW switch is pushed, the switch contact is made and SNOW mode is selected.
To cancel SNOW mode, push the SNOW switch once again.
SNOW mode is automatically cancelled when the engine switch is turned off.
- *2: Pattern Select Switch (SPORT Switch)
When the SPORT switch is pushed, the switch contact is made and SPORT mode is selected.
To cancel SPORT mode, push the SPORT switch once again.
SPORT mode is automatically cancelled when the engine switch is turned off.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - BODY GROUND)
(a) Disconnect the connector of pattern select switch Removal.





(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 ASSEMBLY - MAIN BODY ECU)





(a) Connect the connector of pattern select switch.
(b) Disconnect the cowl side junction block (main body ECU RH) 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