Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Audio & Visual & Telematics / Navigation / Multi Info Display / Navigation System / Start Up Signal Circuit between Radio Receiver Assembly and Navigation ECU

DESCRIPTION

This circuit includes the navigation ECU and radio receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU)

(a) Disconnect the J149 radio receiver assembly connector.

(b) Disconnect the J153 navigation ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J149-7 (SUP) - J153-21 (SUP)

Always

Below 1 Ω

J149-7 (SUP) or J153-21 (SUP) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    Reverse Signal Circuit between Radio Receiver Assembly and Navigation ECU
    DESCRIPTION This circuit includes the navigation ECU and radio receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) (a) Disco ...

    Microphone Circuit
    DESCRIPTION The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines. Using this circuit, the DCM (telemati ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Lane Control System: Diagnostic Trouble Code Chart
    DIAGNOSTIC TROUBLE CODE CHART Lane Control System DTC No. Detection Item Link C1A7496 Steering Vibrator Component Internal Failure U010087 Lost Communication with ECM/PCM "A" Missing Message U012587 Lost Communication with Multi-axis Acceleration Sensor Module Miss ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Sfi System: Actuator Supply Voltage "A" Circuit Short to Ground or Open (P065714)
    DESCRIPTION The electronic throttle control system has a dedicated power supply circuit. The voltage (+BM) is monitored and when it is low (less than 4 V), the ECM determines that there is a malfunction in the electronic throttle control system and cuts off the current to the throttle actuator. When ...

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

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

    © 2026 Copyright www.lexusrx.net
    0.0113