Car-Navigation System Dose Not Start Operation [Car-Navigation System]: Notes

Possible DTC	Even if the NAVI mode is selected, the car-navigation system screen does not display.
POSSIBLE CAUSE	NAV switch malfunction Power supply fuse (+B, ACC) burnt out Open or short circuit in power supply (+B, ACC, GND) wiring harness Open or short circuit in power supply (+B, ACC, GND) wiring harness Open or short circuit in wiring harness between audio unit and car-navigation unit communication system Car-navigation unit malfunction Audio unit malfunction