Navigation System Symptom Troubleshooting - Voice guidance cannot be heard
Voice guidance cannot be heard
Diagnostic Test: Navi System Link
NOTE:
  • Always check the connectors for poor connections or loose terminals.
  • Before troubleshooting, write down the customer's radio station presets.
  • After troubleshooting, enter the radio station presets.
  1. Press the navigation display MENU button.
  1. Check the volume and voice feedback setting for the navigation system in setting screen.
Is either set to OFF?
YES -
Set the voice feedback to ON and select an audible level for the volume.■
NO -
Go to Step 3 .
  1. Check the radio operation.
Can you hear the radio?
YES -
Go to Step 4 .
NO -
Troubleshoot the audio system.■
Is ‘‘Radio'' icon red?
YES -
Troubleshoot the audio system.■
NO -
Go to Step 5 .
  1. Turn the ignition switch OFF.
  1. Disconnect navigation unit connector B (14P) and the audio unit connector B (20P).
  1. Check for continuity between body ground and navigation unit connector B (14P) terminals No. 4, No. 5 and No. 12 individually.
Is there continuity?
YES -
Repair short to ground in the harness between the navigation and audio units. Replace the affected shielded harness.■
NO -
Go to Step 8 .
  1. Check for continuity between navigation unit connector B (14P) terminal No. 11 and terminals No. 4, No. 5 and No. 12 individually.
Is there continuity?
YES -
Repair short to ground in the harness between the navigation and audio units. Replace the affected shielded harness.■
NO -
Go to Step 9 .
  1. Check for continuity between the following terminals of the navigation unit connector B (14P) and the audio unit connector B (20P).
    14P:
    20P:
    No. 4
    No. 12
    No. 5
    No. 11

Is there continuity?
YES -
Go to Step 10 .
NO -
There is an open in the circuit between the navigation unit and audio unit. Check for poor connections or loose terminals at the audio and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.■
  1. Check for continuity between navigation unit connector B (14P) terminal No. 12 and the audio unit connector B (20P) terminal No. 1.
Is there continuity?
YES -
Go to Step 11 .
NO -
There is an open in the circuit between the navigation unit and the audio unit. Check for poor connections or loose terminals at the audio and navigation units. If a poor connection or loose terminal is found, replace the affected shielded harness.■
  1. Substitute a known-good audio unit, and recheck.
Is the system OK?
YES -
Replace the audio unit.■
NO -