Audio And Visual System (For Radio Receiver Type) Microphone Circuit Between Microphone And Radio Receiver


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK RADIO RECEIVER ASSEMBLY

CHECK TELEPHONE MICROPHONE ASSEMBLY

AUDIO AND VISUAL SYSTEM (for Radio Receiver Type) - Microphone Circuit between Microphone and Radio Receiver


DESCRIPTION

Using this circuit, the radio receiver assembly sends power to the telephone microphone assembly, and the telephone microphone assembly sends microphone signals to the radio receiver assembly.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio Receiver Type) Microphone Circuit Between Microphone And Radio Receiver


INSPECTION PROCEDURE

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

  1. Disconnect the H47 radio receiver assembly connector.

  1. Disconnect the W7 map light assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H47-6 (SNS2) - W7-14 (SNS2)
    		Always
    		Below 1 Ω
    H47-4 (MACC) - W7-11 (MACC)
    		Always
    		Below 1 Ω
    H47-5 (MIN+) - W7-12 (MCO+)
    		Always
    		Below 1 Ω
    H47-19 (MIN-) - W7-13 (MCO-)
    		Always
    		Below 1 Ω
    H47-4 (MACC) - Body ground
    		Always
    		10 kΩ or higher
    H47-5 (MIN+) - Body ground
    		Always
    		10 kΩ or higher
    H47-19 (MIN-) - Body ground
    		Always
    		10 kΩ or higher
    H47-18 (SGND) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK RADIO RECEIVER ASSEMBLY


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Audio Video.Audio And Visual System (For Radio Receiver Type).Audio And Visual System (For Radio Receiver Type) Microphone Circuit Between Microphone And Radio Receiver

  1. Remove the radio receiver assembly with its connectors still connected (LandCruiser RM000005M1U002X.html).

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    H47-4 (MACC) - Body ground
    		Ignition switch ACC
    		4 to 6 V

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H47-18 (SGND) - Body ground
    		Always
    		Below 1 Ω
    H47-19 (MIN-) - Body ground
    		Always
    		Below 1 Ω
Text in Illustration
*a
Component with harness connected
(Radio Receiver Assembly)


NG
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (LandCruiser RM0000012A80HUX.html)
OK


3.CHECK TELEPHONE MICROPHONE ASSEMBLY

  1. Replace the telephone microphone assembly with a known good one (LandCruiser RM000002LJJ04XX.html).

  1. Check that the malfunction disappears.

    OK:
    Malfunction disappears.


NG
REPLACE MAP LIGHT ASSEMBLY (LandCruiser RM000003YNP01KX.html)
OK

END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)