Pattern Select Switch Snow Mode Circuit

AA80E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Snow Mode Circuit
- Pattern Select Switch Snow Mode Circuit

DESCRIPTION

The pattern select switch makes it possible to select 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.

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 the SNOW mode is selected.
To cancel the SNOW mode, push the SNOW switch once again.
The SNOW 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 Components.

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





Standard Resistance:





Text in Illustration





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:





Text in Illustration





NG -- REPLACE PATTERN SELECT SWITCH ASSEMBLY Components
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:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures