NAVIGATION SYSTEM Speaker Circuit

DESCRIPTION

The sound signals amplified by the navigation receiver assembly are sent to the speakers from the navigation receiver assembly via the speaker circuit.

If there is a short in a speaker circuit, the navigation receiver assembly detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the navigation receiver assembly or speakers.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

   
   

   • *1: for LH Side

   • *2: for RH Side

   
   

   1. Disconnect the G43 and G44 navigation receiver assembly connectors.

   2. Disconnect the K4*1 and/or J3*2 front No. 1 speaker assembly connector.

   3. Disconnect the K7*1 and/or J6*2 front No. 2 speaker assembly connector.

   4. Disconnect the M2*1 and/or L2*2 rear speaker assembly connector.

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

      Standard Resistance
      for LH Side Tester Connection Condition Specified Condition G43-2 (FL+) - K7-4 (TWL+) Always Below 1 Ω G43-6 (FL-) - K7-2 (TWL-) Always Below 1 Ω K7-3 (+) - K4-1 Always Below 1 Ω K7-1 (-) - K4-2 Always Below 1 Ω G44-2 (RL+) - M2-1 Always Below 1 Ω G44-6 (RL-) - M2-2 Always Below 1 Ω G43-2 (FL+) - Body ground Always 10 kΩ or higher G43-6 (FL-) - Body ground Always 10 kΩ or higher G44-2 (RL+) - Body ground Always 10 kΩ or higher G44-6 (RL-) - Body ground Always 10 kΩ or higher K7-3 (+) - Body ground Always 10 kΩ or higher K7-1 (-) - Body ground Always 10 kΩ or higher
      for RH Side Tester Connection Condition Specified Condition G43-1 (FR+) - J6-4 (TWR+) Always Below 1 Ω G43-5 (FR-) - J6-2 (TWR-) Always Below 1 Ω J6-3 (+) - J3-1 Always Below 1 Ω J6-1 (-) - J3-2 Always Below 1 Ω G44-1 (RR+) - L2-1 Always Below 1 Ω G44-3 (RR-) - L2-2 Always Below 1 Ω G43-1 (FR+) - Body ground Always 10 kΩ or higher G43-5 (FR-) - Body ground Always 10 kΩ or higher G44-1 (RR+) - Body ground Always 10 kΩ or higher G44-3 (RR-) - Body ground Always 10 kΩ or higher J6-3 (+) - Body ground Always 10 kΩ or higher J6-1 (-) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

   
   

   1. Remove the front No. 1 speaker assembly connector.

      Click here

   2. Inspect the front No. 1 speaker assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

   OK

3. INSPECT REAR SPEAKER ASSEMBLY

   
   

   1. Remove the rear speaker assembly connector.

      Click here

   2. Inspect the rear speaker assembly.

      Click here

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE REAR SPEAKER ASSEMBLY Click here

   OK

4. CHECK FRONT NO. 2 SPEAKER ASSEMBLY

   
   

   1. Replace the front No. 2 speaker assembly with a known good one.

      Click here

   2. Check the malfunction disappears.

      Tech Tips

      
      

      • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both LH and RH sides.

      OK
      Malfunction disappears.

      Result
      Proceed to OK NG

   
   

   OK

   END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

   NG

   REPLACE NAVIGATION RECEIVER ASSEMBLY Click here