TERMINALS OF ECU
1. TERMINAL INSPECTION
*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 |
- |
NOTICE:
There is 1 motor and 2 sensors built into the steering lock actuator assembly.
HINT:
(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 |
Inspection
INSPECTION
PROCEDURE
1. INSPECT NO. 1 ULTRASONIC SENSOR
(a) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
Component without harness connected:
(No. 1 Ultrasonic Sensor)
Standar ...
Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129)
DESCRIPTION
These DTCs are stored when a communication malfunction occurs between ECUs that
perform pre-collision system control.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
U0100
Lost Communication with ECM ...
Brake Switch "B" Circuit Short to Battery (P070312)
DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving
in lock-up when the brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then
the ECM cancels the operation of the lock-up clutch while braking is in p ...