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 > Automatic Transaxle System: Input/Turbine Speed Sensor "B" Circuit Short to Battery (P276512,P276514,P276531)
DESCRIPTION The transmission revolution sensor (NC3) detects the automatic transmission No. 3 clutch drum rotation speed. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P276512 Input/Turbine Speed Sensor "B" Circuit Short to Battery 1. Diagnosis Co ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Generator (for 150 A Type): Inspection
INSPECTION PROCEDURE 1. INSPECT GENERATOR PULLEY WITH CLUTCH (a) Hold the center of the generator pulley with clutch, and confirm that the outer ring turns counterclockwise and does not turn clockwise. OK: The outer ring turns counterclockwise and does not turn clockwise. If the result is not as sp ...