Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Terminals Of Ecu

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Intelligent Clearance Sonar System / Terminals Of Ecu

TERMINALS OF ECU

CLEARANCE WARNING ECU ASSEMBLY

(a) Disconnect the J38 clearance warning ECU assembly connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J38-1 (IG) - J38-30 (E)

SB - W-B

IG power source signal

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

J38-30 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the J38 clearance warning ECU assembly connector.

(d) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J38-4 (BOF) - J38-30 (E)

P - W-B

Power source for front sensor circuit

Engine switch off

Below 1 V
  • Engine switch on (IG)
  • Intelligent clearance sonar system on

11 to 14 V

J38-6 (E5) - J38-30 (E)

L - W-B

Ground for front clearance sonar

Always

Below 1 Ω

J38-8 (SOF) - J38-30 (E)

B - W-B

Front sensor communication signal (Front clearance sonar sensor)
  • Engine switch on (IG)
  • Intelligent clearance sonar system on
  • Shift lever in any position other than P or R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 1)

J38-14 (CBZ) - J38-13 (EF)

Y - P

No. 1 clearance warning buzzer signal

Buzzer sounding

Pulse generation

(Refer to waveform 2)

J38-15 (BBZ) - J38-16 (ER)

R - W

No. 2 clearance warning buzzer signal

Buzzer sounding

Pulse generation

(Refer to waveform 2)

J38-22 (BOR) - J38-30 (E)

LG - W-B

Power source for rear sensor circuit

Engine switch off

Below 1 V
  • Engine switch on (IG)
  • Intelligent clearance sonar system on

11 to 14 V

J38-23 (E1) - J38-30 (E)

GR - W-B

Ground for rear clearance sonar

Always

Below 1 Ω

J38-24 (SOR) - J38-30 (E)

SB - W-B

Rear sensor communication signal (Rear clearance sonar sensor)
  • Engine switch on (IG)
  • Intelligent clearance sonar system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

Pulse generation

(Refer to waveform 3)

(e) Using an oscilloscope, check waveform 1.

(1) Waveform 1 (Reference)

Item

Content

Measurement terminal

J38-8 (SOF) - J38-30 (E)

Measurement setting

5 V/DIV., 1 ms./DIV.

Condition
  • Engine switch on (IG)
  • Intelligent clearance sonar system on
  • Shift lever in any position other than P or R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

(f) Using an oscilloscope, check waveform 2.

(1) Waveform 2 (Reference)

Item

Content

Measurement terminal
  • J38-14 (CBZ) - J38-13 (EF)
  • J38-15 (BBZ) - J38-16 (ER)

Measurement setting

2 V/DIV., 500 μs./DIV.

Condition

Buzzer sounding

HINT:

The amplitude of the waveform changes according to the set volume.

(g) Using an oscilloscope, check waveform 3.

(1) Waveform 3 (Reference)

Item

Content

Measurement terminal

J38-24 (SOR) - J38-30 (E)

Measurement setting

5 V/DIV., 1 ms./DIV.

Condition
  • Engine switch on (IG)
  • Intelligent clearance sonar system on
  • Shift lever in R
  • Vehicle speed is less than approximately 10 km/h (6 mph)

ECM

Click here

COMBINATION METER ASSEMBLY

Click here

    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of ...

    Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION (a) Intelligent clearance sonar system data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Window Control System: Diagnosis System
    DIAGNOSIS SYSTEM DESCRIPTION (a) Power window control system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3). When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs. CHECK DLC3 (a) Check the D ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Differential Case: Components
    COMPONENTS ILLUSTRATION *1 DIFFERENTIAL CASE TAPERED ROLLER BEARING (FRONT SIDE) *2 DIFFERENTIAL CASE TAPERED ROLLER BEARING (FRONT SIDE OUTER RACE) *3 DIFFERENTIAL CASE TAPERED ROLLER BEARING (FRONT SIDE INNER RACE) *4 DIFFERENTIAL CASE TAPERED ROLLER BEARING (REAR SIDE) *5 ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.0124