Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. TERMINAL INSPECTION
Text in Illustration
|
*a |
Component without harness connected (Steering Lock ECU (Steering Lock Actuator or UPR Bracket Assembly)) |
- |
- |
(a) Measure the voltage and resistance according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Input/Output |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
Related Data List Item |
|---|---|---|---|---|---|---|
|
S45-1 (GND) - Body ground |
- |
W-B - Body ground |
Ground* |
Always |
Below 1 Ω |
- |
|
S45-3 (IGE) - S45-1 (GND) |
Input |
Y - W-B |
Steering lock motor activation command signal (motor activation command signal sent from certification ECU (smart key ECU assembly)) |
Any door opened when conditions below met, and then steering lock motor activated:
|
Pulse generation (see waveform) |
Smart Key
|
|
S45-4 (SLP1) - S45-1 (GND) |
Output |
BE - W-B |
Steering lock bar position signal (output signal from steering unlock sensor) |
Steering locked → unlocked |
11 to 14 V → Below 1.5 V |
Smart Key
|
|
S45-5 (LIN) - S45-1 (GND) |
Input/Output |
L - W-B |
LIN communication line |
- |
- |
Smart Key
|
|
S45-6 (IG2) - S45-1 (GND) |
Input |
B - W-B |
Power source mode signal (IG2 power supply input for entire steering lock actuator assembly)* |
Engine switch off → engine switch on (IG) |
Below 1 V → 11 to 14 V |
- |
|
S45-7 (B) - Body ground |
Input |
R - Body ground |
Power source* |
Always |
11 to 14 V |
- |
- *: When there is a problem with the power source input, the certification ECU (smart key ECU assembly) may store DTC B2786.
NOTICE:
There is 1 motor and 2 sensors built into the steering lock actuator assembly.
HINT:
- When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
- In order to take measurements when the lock motor is operating, perform
either of the following operations:
- To unlock the steering, carry the key and turn the engine switch on (ACC) or on (IG).
- To lock the steering, turn the engine switch off with the shift lever in P, and then open a door.
(1) Waveform
|
Item |
Content |
|---|---|
|
Tester Connection |
S45-3 (IGE) - S45-1 (GND) |
|
Tool Setting |
2 V/DIV., 200 ms./DIV. |
|
Vehicle Condition |
Steering lock motor not operating → Operating → Not operating |
|
*a |
Steering Lock Motor not Operating |
|
*b |
Steering Lock Motor Operating |
Dtc Check / Clear
DTC CHECK / CLEAR
NOTICE:
The steering lock ECU (steering lock actuator or UPR bracket assembly)
does not store history DTCs. If any DTCs are output, confirm and record
them as soon ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
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 ...
Other materials:
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT NO. 2 SPEAKER ASSEMBLY RH
(a) Connect the connector.
(b) Install the front No. 2 speaker assembly RH with the 2 bolts.
Torque:
8.4 N·m {86 kgf·cm, 74 in·lbf}
NOTICE:
Do not touch the cone part of the front No. 2 speaker assembly RH.
...
Steering Angle Sensor Zero Point Malfunction (C1290)
DESCRIPTION
The skid control ECU (brake actuator assembly) acquires steering angle sensor
zero point every time the ignition switch is turned ON and the vehicle is driven
at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the
previous zero point.
If front wheel alig ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether a part
is faulty or not.
HINT:
Using the Techstream to read the Data List allows t ...
