TERMINALS OF ECU
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
---|---|---|---|---|
J157-1 (+B) - J157-20 (E) | Y - W-B | Power source (+B) | Always | 11 to 14 V |
J157-3 (SIG-) - J157-20 (E) | G - W-B | Ground | Always | Below 1 V |
J157-4 (IND1) - J157-20 (E) | LG - W-B | Manual (SOS) switch red indicator illumination signal | For 2 seconds after turning the engine switch on (IG) | 1 to 8.5 V |
Engine switch off | Below 1 V | |||
J157-5 (MCVD) - J157-20 (E) | L - W-B | Telephone microphone assembly power supply | Engine switch on (ACC) | 4 to 6 V |
Engine switch off | Below 1 V | |||
J157-6 (MCI+) - J157-20 (E) | P - W-B | Receive microphone voice signal | Voice being input to telephone microphone assembly | A waveform synchronized with microphone voice signal is input |
J157-7 (MCI-) - J157-20 (E) | G - W-B | Receive microphone voice signal | Always | Below 1 V |
J157-13 (GSW) - J157-20 (E) | L - W-B | Collision detection signal | Engine switch on (IG) | Pulse generation (Refer to waveform1) |
J157-19 (IG2) - J157-20 (E) | B - W-B | Power source (IG) | Engine switch on (IG) | 11 to 14 V |
Engine switch off | Below 1 V | |||
J157-20 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
J157-21 (SIG1) - J157-3 (SIG-) | R - G | Manual (SOS) switch button condition signal | Manual (SOS) switch not pressed | 1.3 to 1.9 V |
Manual (SOS) switch pressed | 0.5 to 0.8 V | |||
J157-22 (IND2) - J157-20 (E) | V - W-B | Manual (SOS) switch green indicator illumination signal | For 2 seconds after turning the engine switch on (IG) | 1 to 8.5 V |
Engine switch off | Below 1 V | |||
J157-23 (SGND) - J157-20 (E) | Shielded - W-B | Shield ground | Always | Below 1 Ω |
J157-25 (CANP) | R | CAN communication signal | - | - |
J157-26 (CANN) | W | CAN communication signal | - | - |
CHECK DCM (TELEMATICS TRANSCEIVER)
(a) Oscilloscope waveform:
(1) Waveform 1
Item | Condition |
---|---|
Tester connection | J157-13 (GSW) - J157-20 (E) |
Tool setting | 5.0 V/DIV., 20 ms/DIV. |
Vehicle condition | Engine switch on (IG) |
CHECK RADIO RECEIVER ASSEMBLY
w/o Navigation System: Click here
w/ Navigation System: Click here
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Steering System: Fail-safe Chart
FAIL-SAFE CHART If a problem occurs in the power steering system, the power steering assist will be stopped or the amount of power assist will be decreased to protect the system. Power Steering System Malfunction Fail-safe Operation EPS warning light Buzzer
Torque sensor (electric po ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Seat Heater Switch (for Rear Side): Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during rear seat heater switch removal/installation are shown below. Necessary Procedure After Parts Removed/In ...