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:
Front Radar Sensor Incorrect Axial Gap (C1A11)
DESCRIPTION
When the vehicle is determined to be driving in a straight line or on a gradual
curve based on signals from the yaw rate sensor, etc., the millimeter wave radar
sensor assembly performs self diagnosis to check if the sensor beam axis has deviated.
If the millimeter wave radar sens ...
Front Evaporator Temperature Sensor
Inspection
INSPECTION
PROCEDURE
1. INSPECT COOLER THERMISTOR SENSOR
(a) Check the resistance.
(1) Measure the resistance and check the results in accordance with the
values in the table below.
Standard:
Tester Connection
Condition
...
Accumulator Low Pressure (C1452)
DESCRIPTION
DTC Code
DTC Detection Condition
Trouble Area
C1452
After braking, the fluid pressure inside the accumulator is below the
threshold within 3.2 seconds.
Hydraulic circuit
Accumulator pressure sen ...
