Lexus NX: Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier

Lexus NX Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Voice Guidance Circuit between Radio Receiver and Stereo Component Amplifier

DESCRIPTION

This circuit is used when the voice switch of the steering pad switch assembly is pushed.

Using this circuit, the radio and display receiver assembly sends signals to the stereo component amplifier assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - STEREO COMPONENT AMPLIFIER ASSEMBLY)

(a) Disconnect the I154 radio and display receiver assembly connector.

(b) Disconnect the P46 stereo component amplifier assembly connector.

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

Standard Resistance:

Tester connection

Condition

Specified condition

I154-3 (RL+) - P46-15 (II1+)

Always

Below 1 Ω

I154-8 (RL-) - P46-14 (II1-)

Always

Below 1 Ω

P46-18 (SLD1) - Body ground

Always

10 kΩ or higher

I154-3 (RL+) or P46-15 (II1+) - Body ground

Always

10 kΩ or higher

I154-8 (RL-) or P46-14 (II1-) - 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

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