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Home >> Lexus >> 2010 >> LS 460 AWD V8-4.6L (1UR-FSE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Accessory Control Display >> Testing and Inspection >> Component Tests and General Diagnostics >> Microphone Circuit Between Microphone And Multi-Display

Microphone Circuit Between Microphone And Multi-Display





AUDIO / VISUAL: ELECTRO MULTI VISION SYSTEM: Microphone Circuit between Microphone and Multi-display
- Microphone Circuit between Microphone and Multi-display

DESCRIPTION

w/ Manual (SOS) Switch

Using this circuit, the telematics transceiver sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display via the telematics transceiver. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

w/o Manual (SOS) Switch

Using this circuit, the telematics transceiver sends power to the map light assembly (telephone microphone assembly), and the map light assembly (telephone microphone assembly) sends microphone signals to the display and navigation module display. The display and navigation module display and map light assembly (telephone microphone assembly) are connected to each other using the microphone connection detection signal lines.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT DISPLAY AND NAVIGATION MODULE DISPLAY

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





Standard Resistance:





Text in Illustration





NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - MAP LIGHT ASSEMBLY)

(a) Disconnect the L59 display and navigation module display connector.

(b) Disconnect the X4 map light assembly connector.

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

Standard Resistance:

w/ Manual (SOS) Switch
w/o Manual (SOS) Switch










Result





C -- REPAIR OR REPLACE HARNESS OR CONNECTOR

B -- CHECK DISPLAY AND NAVIGATION MODULE DISPLAY
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - TELEMATICS TRANSCEIVER)

(a) Disconnect the L59 display and navigation module display connector.

(b) Disconnect the L111 telematics transceiver connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY)

(a) Disconnect the L111 telematics transceiver connector.

(b) Disconnect the X4 map light assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK TELEMATICS TRANSCEIVER

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- REPLACE TELEMATICS TRANSCEIVER Removal
OK -- Continue to next step.

6. CHECK MAP LIGHT ASSEMBLY

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





Standard Resistance:





Text in Illustration





NG -- REPLACE TELEMATICS TRANSCEIVER
OK -- Continue to next step.

7. CHECK MAP LIGHT ASSEMBLY

(a) Reconnect the L59 display and navigation module display connector.





(b) Reconnect the L111 telematics transceiver connector.

(c) Reconnect the X4 map light assembly connector.

(d) Turn the engine switch on (ACC).

(e) Connect an oscilloscope to terminals 21 (MI1+) and 20 (MIC-) of the X4 telephone microphone assembly connector.

(f) Check the waveform of the telephone microphone assembly using the oscilloscope.

Text in Illustration





Result





B -- REPLACE TELEMATICS TRANSCEIVER

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

8. REPLACE TELEMATICS TRANSCEIVER

(a) Replace the telephone microphone assembly (See page ).

(b) Check if the same malfunction recurs.

Result





B -- REPLACE MAP LIGHT ASSEMBLY Removal

A -- END

9. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY

(a) Reconnect the L59 display and navigation module display connector.





(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.

10. CHECK MAP LIGHT ASSEMBLY

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





Standard Resistance:





Text in Illustration





NG -- CHECK MAP LIGHT ASSEMBLY
OK -- Continue to next step.

11. CHECK MAP LIGHT ASSEMBLY

(a) Reconnect the L59 display and navigation module display connector.





(b) Reconnect the X4 map light assembly connector.

(c) Turn the engine switch on (ACC).

(d) Connect an oscilloscope to terminals 21 (MI1+) and 20 (MIC-) of the X4 telephone microphone assembly connector.

(e) Check the waveform of the telephone microphone assembly using the oscilloscope.

Text in Illustration





Result





B -- CHECK MAP LIGHT ASSEMBLY

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

12. CHECK MAP LIGHT ASSEMBLY

(a) Replace the telephone microphone assembly (See page ).

(b) Check if the same malfunction recurs.

Result





NG -- REPLACE MAP LIGHT ASSEMBLY Removal

OK -- END
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