Honda 2004 Odyssey Service Manual page 361

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Fuel and Emissions Systems

System Descriptions (cont'd)

Exhaust Gas Recirculation (EGR) System Diagram

The EGR system reduces oxides of nitrogen (NOx) emissions by recirculating exhaust gas through the EGR valve and

the intake manifold into the combustion chambers. The PCM memory includes the ideal EGR valve lift for varying

operating conditions.

The EGR valve position sensor detects the amount of EGR valve lift and sends it to the PCM. The PCM then compares it

with the ideal lift in its memory (based on signals sent from other sensors). If there is any difference between the two,

the PCM cuts current to the EGR valve.

*1: GRN/YEL: '02-04 models

*2: BLU/RED: '02-04 models

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