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:
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals may be ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting a vehicle with a diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the clearance warning ECU assembly.
The clearance warning E ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER
(a) Disconnect the T14 tire pressure warning ECU and receiver connector and measure
the voltage and resistance on the wire harness side.
Text in Illustration
*A
w/o Wireless Door Lock System
...
