Pattern Select Switch Circuit

U151E AUTOMATIC TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: Pattern Select Switch Circuit
- Pattern Select Switch Circuit

DESCRIPTION

ECT SNOW is the system that operates the throttle motor to control engine output to reduce skidding of the driving wheels, guarantee takeoff acceleration, driving straightness and turning stability.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. DRIVING TEST

(a) Start the engine.

(b) Turn the ECT SNOW switch "OFF" (Normal drive mode).

(c) Confirm vehicle response by driving from a parked position to fully depressing the accelerator pedal (*1).

(d) Turn the ECT SNOW switch "ON" and perform the same check as (*1).

Confirm that there is a difference between ECT SNOW switch "ON" and "OFF".

HINT
* Driving test should be done on a paved road (a nonskid road).
* Make sure not to use the VSC system when testing a vehicle equipped with one.

Standard:

There is a difference in acceleration between "ON" and "OFF".

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

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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

(a) Disconnect the No. 1 pattern select switch (ECT SNOW switch) connector.





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

HINT
The No. 1 pattern select switch connector has no terminals in locations of 1, 2, 7 and 8.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT NO. 1 PATTERN SELECT SWITCH ASSEMBLY

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





HINT
The No. 1 pattern select switch connector has no terminals in locations of 1, 2, 7 and 8.

Standard resistance:





NG -- REPLACE NO. 1 PATTERN SELECT SWITCH ASSEMBLY
OK -- Continue to next step.

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

(a) Connect the No. 1 pattern select switch (ECT SNOW switch) connector.





(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE