Voice Guidance Cannot Be Heard
Voice guidance cannot be heardNOTE:
- Always check the connectors for poor connections or loose terminals.
- Before troubleshooting, write down the customer's radio station presets, and get the radio and navigation system anti-theft codes.
- After troubleshooting, enter the radio and navigation system anti-theft codes, and the radio station presets.
1. Press the display unit A/C INFO button, and select "set-up".
2. Check the volume setting for the navigation system.
Is the set OFF?
YES - Set the volume to an audible level.
NO - Go to step 3.
3. Check the radio operation.
Can you hear the radio?
YES - Go to step 4.
NO - Troubleshoot the audio system.
4. Go into the Diagnostic mode and use the "Navi System Link" diagnostic to check the radio.
Is "Radio" icon red?
YES - Troubleshoot the audio system.
NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Disconnect the navigation unit connector B (14P).
7. Check for continuity between body ground and navigation unit connector B (14P) terminals No.5 and No.12 individually.
Is there continuity?
YES - Replace the affected shielded harness.
NO - Go to step 8.
8. Disconnect the navigation unit connector A (20P).
9. Check for continuity between the navigation unit connector A (20P) terminal No.15 and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the audio unit and the navigation unit.
NO - Go to step 10.
10. Check for continuity between navigation unit connector B (14P) terminal No.5 and the audio unit 20P connector terminal No.13.
Is there continuity?
YES - Go to step 11.
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.
11. Check for continuity between navigation (rut connector B (14P) terminal No.12 and the audio unit 20P connector terminal No.11.
Is there continuity?
YES - Go to step 12.
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.
12. Check for continuity between navigation unit connector A (20P) terminal No.15 and the audio unit 20P connector terminal No.14.
Is there continuity?
YES - For vehicle with touring package, go to step 13. For vehicles without touring package, go to step 17.
NO - Repair open in the wire between the navigation unit and the audio unit.
13. Disconnect the navigation unit connector D(16P) and the front amplifier unit 26P connector.
14. Check for continuity between body ground and navigation unit connector D (16P) terminal No.1.
Is there continuity?
YES - Repair short to body ground in the wire between the navigation unit, the audio unit, and the front amplifier unit.
NO - Go to step 15.
15. Check for continuity between navigation unit connector D (16P) terminal No.1 and the audio unit 20P connector terminal No.1.
Is there continuity?
YES - Go to step 16.
NO - Repair open in the wire between the navigation unit and the audio unit.
16. Check for continuity between navigation unit connector D (16P) terminal No.1 and the amplifier unit 26P connector terminal No.5.
Is there continuity?
YES - Go to step 17.
NO - Repair open in the wire between the navigation unit and the amplifier unit.
17. Substitute a known-good audio unit and recheck.
Is the system?
YES - Replace the audio unit.
NO - For vehicles with touring package, go to step 18. For vehicles without touring package, replace the navigation unit.
18. Substitute a known-good amplifier unit and recheck.
Is the system OK?
YES - Replace the amplifier unit.
NO - Replace the navigation unit.