NO.4 NO VOICE NAVIGATION [CAR-NAVIGATION SYSTEM]

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4 | Even if the route guidance mode is initiated, there is no voice guidance
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Possible DTC | —
POSSIBLE CAUSE | • Route guidance mode setting mistake • Poor volume adjustment of audio system • Car-navigation unit malfunction

Diagnostic Procedure

Step | Inspection | Action
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1 | VERIFY MALFUNCTION SYMPTOM • Turn the ignition switch to the ON position. • Turn the audio unit power on and select NAVI mode. • Operate the route guidance mode. • Is voice output? | Yes | System is normal. (Explain to the customer that voice guidance only begins if the route guidance mode is activated.)
No | Go to the next step.
2 | DETERMINE IF MALFUNCTION CAUSE IS POOR AUDIO VOLUME ADJUSTMENT • Turn the audio unit power on and select radio mode. • Operate the POWER/VOLUME switch and change the audio unit volume. • Is audio output? | Yes | Go to the next step.
No | Perform inspection referring to NO SOUND FROM ALL SPEAKERS [ENTIRE AUDIO SYSTEM] (See NO.3 NO SOUND FROM ALL SPEAKERS [ENTIRE AUDIO SYSTEM].)
3 | DETERMINE IF MALFUNCTION CAUSE IS CAR-NAVIGATION UNIT • Turn the ignition switch to the ON position and launch the audio unit diagnostic assist function. (See DIAGNOSTIC ASSIST FUNCTION [AUDIO].) • Select diagnostic assist code 16 external device connection information clearing. • Turn the ignition switch to the OFF position. • Turn the ignition switch to the ON position. • Turn the audio unit power on and select NAVI mode. • Operate the route guidance mode. • Is audio output? | Yes | Troubleshooting completed.
No | Replace the car-navigation unit. (See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)