Selective Catalytic Reduction (SCR) System

Selective Catalytic Reduction (SCR) System

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WARNING

The SCR system is designed to reduce nitrogen oxide (NOx) in the exhaust gas and purify the exhaust gas by injecting it with Diesel Exhaust Fluid (DEF).



Be careful not to allow the DEF to run out. If the DEF completely runs out, the SCR system will not operate normally.

When the remaining DEF is low, a message is displayed on the multi-information display, and the SCR WARNING light turns on/flashes.

Refer to Selective Catalytic Reduction (SCR) System Indications on page 4-228.

In this case, consult an Authorized Mazda Dealer. If DEF needs to be replenished, add DEF following the specified procedure.

Refer to Diesel Exhaust Fluid (DEF) Replenishment on page 6-33.


NOTE

- DEF needs to be replenished periodically according to the scheduled maintenance information.

- Normally, the vehicle can be driven about 12,000 km (7,500 miles) before the DEF needs to be replenished. However, it may need to be replenished earlier depending on the driving and environmental conditions (such as putting a high load on the engine while driving or driving the vehicle at high altitudes).

- The sound of the SCR system operating may be heard from the area under the vehicle, however, this does not indicate a problem.

β–Ό Selective Catalytic Reduction (SCR) System Indications

As the remaining amount of Diesel Exhaust Fluid (DEF) lowers, the SCR system notifies the driver using the following indications.

The vehicle speed may be restricted for a while even if the WARNING light turns off after replenishing the DEF. To cancel the vehicle speed restriction immediately, switch the ignition OFF after the WARNING light turns off and then switch the ignition ON again.


Status

WARNING sound

SCR warn- ing light

Multi-information display indication

Driving restric- tion

Remaining DEF has decreased

(Maximum driving dis- tance : 966 km (600 miles) or less)


Sound is activated when igni- tion is switched ON


Turns off


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None

Selective Catalytic Reduction (SCR) System

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Status

WARNING sound

SCR warn- ing light

Multi-information display indication

Driving restric- tion


Remaining DEF is low (Maximum driving dis- tance : 644 km (400 miles) or less)


Sound is activated when igni- tion is switched ON


Turns on


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Vehicle speed of 80 km/h (50 mph) or slower

Remaining DEF is ex- tremely low (Maximum driving dis- tance : 322 km (200 miles) or less)


Sound is activated when igni- tion is switched ON


Flashes


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Vehicle speed of 48 km/h (30 mph) or slower


No remaining DEF (Maximum driving dis- tance : 0 km (0 miles))


Sound is activated when re- maining-distance-to-empty in- dication is 0 km (0 miles)


Flashes


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Creep travel*1

*1 The vehicle speed will be restricted (Creep travel) the next time the vehicle is driven after the maximum driving distance reaches 0 km (0 miles).


The following indications are displayed when there is a problem with the SCR system/DEF. If there is a problem with the SCR system/DEF, consult an Authorized Mazda Dealer.

The vehicle speed may be restricted for a while even if the WARNING light turned off after having the vehicle repaired. To cancel the vehicle speed restriction immediately, switch the ignition OFF after the WARNING light turns off, and then switch the ignition ON again.


Status

WARNING sound

SCR warn- ing light

Multi-information display indication

Driving restric- tion

There is a problem with the SCR system/DEF (Maximum driving dis- tance : 402 km (250 miles) or less)


- Sound is activated when there is a problem

- Sound is activated when igni- tion is switched ON


Flashes


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None

Condition in which a problem with SCR sys- tem/DEF continues (Maximum driving dis- tance : 201 km (125 miles) or less)


Sound is activated when igni- tion is switched ON


Flashes


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Vehicle speed of 48 km/h (30 mph) or slower


Status

WARNING sound

SCR warn- ing light

Multi-information display indication

Driving restric- tion

Condition in which a problem with SCR sys- tem/DEF continues (Maximum driving dis- tance : 0 km (0 miles))


Sound is activated when re- maining-distance-to-empty in- dication is 0 km (0 miles)


Flashes


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Creep travel*1


DEF has been replen- ished over the specified amount


―


Turns on


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None

*1 The vehicle speed will be restricted (Creep travel) the next time the vehicle is driven after the maximum driving distance reaches 0 km (0 miles).


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