2018-Navigator-Owners-Manual

Maintenance

When Fail-Safe Mode Is Activated WARNINGS

1. Pull off the road as soon as safely possible and switch the engine off. 2. If you are a member of a roadside assistance program, we recommend that you contact your roadside assistance service provider. 3. If this is not possible, wait a short period for the engine to cool. 4. Check the coolant level. If the coolant level is at or below the minimum mark, add prediluted coolant immediately. 5. When the engine temperature cools, you can re-start the engine. Have your vehicle checked as soon as possible to minimize engine damage. Note: Driving your vehicle without repair increases the chance of engine damage.

If the engine reaches a preset over-temperature condition, the engine automatically switches to alternating cylinder operation. Each disabled cylinder acts as an air pump and cools the engine. When this occurs, your vehicle still operates, however: • Engine power is limited. • The air conditioning system turns off. Continued operation increases the engine temperature, causing the engine to completely shut down. Your steering and braking effort increases in this situation. When the engine temperature cools, you can re-start the engine. Have your vehicle checked as soon as possible to minimize engine damage.

Fail-safe mode is for use during emergencies only. Operate your

vehicle in fail-safe mode only as long as necessary to bring your vehicle to rest in a safe location and seek immediate repairs. When in fail-safe mode, your vehicle will have limited power, will not be able to maintain high-speed operation, and may completely shut down without warning, potentially losing engine power, power steering assist, and power brake assist, which may increase the possibility of a crash resulting in serious injury. Never remove the coolant reservoir cap when the engine is running or hot. Your vehicle has limited engine power when in the fail-safe mode, drive your vehicle with caution. Your vehicle does not maintain high-speed operation and the engine may operate poorly. Remember that the engine is capable of automatically shutting down to prevent engine damage. In this situation:

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Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201708, First Printing