When the ambiance temperature becomes extremely low or extremely high, or when HDD is malfunctioning, AV control unit displays the message and limits the AV control unit function.  FAIL‐SAFE CONDITIONS - When the ambiance temperature is −20°C (−4°F) or less, or when it is 70°C (158°F) or more
- when HDD is malfunctioning
 Display The messages displayed on fail-safe conditions are as shown below:  Fail-safe mode
| Display indication (fail-safe status display)
| HDD at low temperature
| The HDD does not operate when at a low temperature, and some functions cannot be used. These may return if the temperature increases
| HDD at high temperature
| The HDD does not operate when at a high temperature, and some functions cannot be used. These may return if the temperature decreases
| When HDD is malfunctioning
| A malfunction is detected on the HDD. Contact the dealer
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 DESCRIPTION OF CONTROLS Function
| When Fail‐safe Function is activated
| Air conditioner
| Operation
| Only the operation of preset switch is possible.
| Display
| - Illumination of preset switch LED.
- Simplified indication of set temperature, wind direction, and air volume to the display.
| Audio
| Operation
| Only ON/OFF of the audio system by preset switch and volume operation are possible.
| Display
| No display (“Fail-safe mode” is displayed).
| Hands-free phone
| Operation
| It cannot be operated.
| Navigation
| Operation
| It cannot be operated.
| Multifunction meter
| Operation
| It cannot be operated.
| Self diagnosis
| The display indication is a simple indication of the fail-safe condition.
| CONSULT-III diagnosis
| It cannot be diagnosed.
|  Ability Operation Mode There is an ability operation mode for Fail‐safes due to low or high ambiance temperature. If HDD data can be read, fail‐safe is shown, then normal displays are displayed only for functions which can be operated.
 RELEASE CONDITIONS OF FAIL‐SAFE Fail‐safe is released on following conditions and normal mode is restored.  When The Temperature of HDD Is Low or High If the ambient temperature becomes out of fail-safe condition range, normal mode is restored.
 When HDD Is Malfunctioning If the malfunction disappears, normal mode is restored. NOTE: - If fail‐safe mode due to HDD malfunction is seen continuously, replace AV control unit.
- If fail‐safe mode due to HDD malfunction is seen temporarily, check the “Error History” of Confirmation/Adjustment mode. If this is normal, then continue the normal operation, observing the function. (It might be a temporary malfunction of HDD.)
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