Toyota Tacoma 2015-2018 Service Manual: 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
|
|
.gif)
).
(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 |
|
*1 |
Pattern Select Switch Assembly |
| NG | .gif) |
REPLACE PATTERN SELECT SWITCH ASSEMBLY |
|
.gif)
|
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 |
|
*a |
Front view of wire harness connector (to Pattern Select Switch Assembly)) |
| NG | |
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 |
|
*a |
Rear view of wire harness connector (to ECM) |
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Transmission Fluid Temperature Sensor "A" Performance (P0711)
DESCRIPTION
The No. 1 ATF temperature sensor converts the fluid temperature into a resistance
value for use by the ECM.
The ECM applies a voltage to the temperature sensor through terminal THO1 of ...
Transmission Control Switch Circuit
DESCRIPTION
After moving the shift lever to S, it is possible to switch the shift range between
"1" (S1 range) and "6" (S6 range) using the transmission control switch.
Moving ...
Other materials:
Transponder Key Amplifier
Components
COMPONENTS
ILLUSTRATION
Installation
INSTALLATION
PROCEDURE
1. INSTALL TRANSPONDER KEY COIL
(a) Engage the 2 claws to install the transponder key coil.
(b) Connect the connector.
2. INSTALL UPPER STEERING COLUMN COVER
(S ...
Acceleration Sensor Power Supply Voltage Malfunction (C1381)
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw
rate and acceleration (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle's condition using 2 ...
Fuel Pressure Sensor
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT FUEL DELIVERY PIPE SUB-ASSEMBLY (FUEL PRESSURE SENSOR)
NOTICE:
Do not remove the fuel pressure sensor from the fuel delivery pipe sub-assembly.
If a fuel pressure sensor is removed, replace the ...