Daihatsu F300 Service Manual page 1365

EMISSION CONTROL SYSTEM
THREE-WAY CATALYST (TWC) SYSTEM
If this three-way catalyst, the oxidation of carbon monoxide (CO) and the reduction of nitrogen oxides (NOx)
contained in exhaust gas can take place simultaneously. Thus, the three-way catalyst purifies the exhaust
gas by converting its harmful components gas into harmless carbon dioxide (C02), water vapor (H20) and
nitrogen (N2.).
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Three-way Catalyst (TWC)
(Monolithic)
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Exhaust gas component
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rNC
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HC, CO and NOx
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Oxidation and reduction
INSPECTION OF EXHAUST PIPE ASSEMBLY
1. Check the connections for looseness or damage.
2. Check the clamps for weakness, bend or damage.
INSPECTION OF HEAT INSULATOR
1. Check heat insulator for damage.
2. Check for adequate clearance between the three~way
catalyst and heat insulator.
EC-26
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C02 N2 H2 0
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Exhaust gas
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C02,
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