Toyota Tacoma (2015-2018) Service Manual: Pattern Select Switch Power Mode Circuit

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2tr-fe) / Pattern Select Switch Power Mode Circuit

DESCRIPTION

The ECM memory contains the programs for the normal and PWR shift patterns.

By following the programs corresponding to the signals from the pattern select switch assembly, park/neutral position switch and other various sensors, the ECM switches the shift solenoid valves on and off, and controls the transmission gear ratio.

WIRING DIAGRAM

PROCEDURE

1.	INSPECT PATTERN SELECT SWITCH ASSEMBLY

(a) Remove the pattern select switch assembly (See page ).

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
1 (E) - 4 (B)	Pattern select switch assembly pushed	Below 1 Ω
1 (E) - 4 (B)	Pattern select switch assembly not pushed	10 kΩ or higher

Text in Illustration

*1	Pattern Select Switch Assembly

REPLACE PATTERN SELECT SWITCH ASSEMBLY

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

(a) Disconnect the pattern select switch assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
P20-1 (E) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Pattern Select Switch Assembly))

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSEMBLY - ECM)

(a) Disconnect the ECM connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
E21-14 (PWMS) - Body ground	Pattern select switch assembly pushed	Below 1 Ω
E21-14 (PWMS) - Body ground	Pattern select switch assembly not pushed	10 kΩ or higher

Text in Illustration

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPAIR OR REPLACE HARNESS OR CONNECTOR

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