Audio And Visual System (W/O Navigation System) Microphone Circuit Between Microphone And Radio Receiver

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200
Audio Video. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT RADIO RECEIVER ASSEMBLY

CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - RADIO RECEIVER ASSEMBLY)

INSPECT MAP LIGHT ASSEMBLY

INSPECT MAP LIGHT ASSEMBLY

REPLACE TELEPHONE MICROPHONE ASSEMBLY

AUDIO AND VISUAL SYSTEM (w/o Navigation System) - Microphone Circuit between Microphone and Radio Receiver


DESCRIPTION

This circuit sends the microphone signal from the map light assembly (telephone microphone assembly) to the radio receiver assembly.
It also supplies power source from the radio receiver assembly to the map light assembly (telephone microphone assembly).

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Microphone Circuit Between Microphone And Radio Receiver


INSPECTION PROCEDURE

1.INSPECT RADIO RECEIVER ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Microphone Circuit Between Microphone And Radio Receiver

  1. Disconnect the F54 radio receiver assembly connector.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F54-3 (MACC) - Body ground
    		Engine switch on (IG)
    		4 to 6 V
    Measure the resistance according to the value(s) in the table below.
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    F54-6 (SGND) - Body ground
    		Always
    		Below 1 Ω
    F54-5 (MIN-) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Component without harness connected
    (Radio Receiver Assembly)


NG
REPLACE RADIO RECEIVER ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (MAP LIGHT ASSEMBLY - RADIO RECEIVER ASSEMBLY)

  1. Disconnect the R7 map light assembly and F54 radio receiver assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R7-20 (SNS2) - F54-1 (SNS2)
    		Always
    		Below 1 Ω
    R7-27 (MI1+) - F54-2 (MIN+)
    		Always
    		Below 1 Ω
    R7-26 (MIC-) - F54-5 (MIN-)
    		Always
    		Below 1 Ω
    R7-25 (ACC) - F54-3 (MACC)
    		Always
    		Below 1 Ω
    R7-20 (SNS2) - Body ground
    		Always
    		10 kΩ or higher
    R7-27 (MI1+) - Body ground
    		Always
    		10 kΩ or higher
    R7-26 (MIC-) - Body ground
    		Always
    		10 kΩ or higher
    R7-25 (ACC) - Body ground
    		Always
    		10 kΩ or higher
    F54-6 (SGND) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT MAP LIGHT ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Microphone Circuit Between Microphone And Radio Receiver

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R7-20 (SNS2) - R7-26 (MIC-)
    		Always
    		Below 1 Ω
    Text in Illustration
    *1
    		Component without harness connected
    (Map Light Assembly)


NG
Go to step 5
OK


4.INSPECT MAP LIGHT ASSEMBLY


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (W/O Navigation System) Microphone Circuit Between Microphone And Radio Receiver

  1. Reconnect the radio receiver assembly connector.

  1. Reconnect the map light assembly connector.

  1. Turn the engine switch on (ACC).

  1. Connect an oscilloscope to terminals R7-27 (MI1+) and R7-26 (MIC-) of the map light assembly connector.

  1. Check the waveform of the telephone microphone assembly using an oscilloscope.

    Result
    Result
    		Proceed to
    A waveform synchronized with the voice input to the telephone microphone assembly is output
    		A
    A waveform synchronized with the voice input to the telephone microphone assembly is not output
    		B
Text in Illustration
*1
Component with harness connected
(Map Light Assembly)


B
Go to step 5
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

5.REPLACE TELEPHONE MICROPHONE ASSEMBLY

  1. Replace the telephone microphone assembly (Click here).

  1. Check if the same malfunction recurs.

    Result
    Result
    		Proceed to
    Malfunction does not recur
    (returns to normal)
    		A
    Malfunction recurs
    		B


B
REPLACE MAP LIGHT ASSEMBLY (Click here)
A

END