NAVIGATION SYSTEM Microphone Circuit between Overhead J/B and Multi-display

DESCRIPTION

This circuit sends a microphone signal from the overhead junction block to the multi-display. It also supplies power from the multi-display to the overhead junction block.

WIRING DIAGRAM

A0160NNE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (OVERHEAD JUNCTION BLOCK - MULTI-DISPLAY)


    1. A01637UE01

      Disconnect the overhead junction block connector and multi-display connector.

    2. A0162ELE03

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R5-15 (ACC) - J51-9 (MACC) Always Below 1 Ω
      R5-16 (MI1+) - J51-11 (MIN+) Always Below 1 Ω
      R5-17 (MIC-) - J51-10 (MIN-) Always Below 1 Ω
      J51-5 (TSW-) - J51-12 (SGND) Always Below 1 Ω
      R5-15 (ACC) - Body ground Always 10 kΩ or higher
      R5-16 (MI1+) - Body ground Always 10 kΩ or higher
      R5-17 (MIC-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT MULTI-DISPLAY


    1. A0161RZE01

      Reconnect the multi-display connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      J51-9 (MACC) - Body ground Engine switch on (ACC) 4 to 6 V

    NG

    REPLACE MULTI-DISPLAY Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here