1998 HONDA CIVIC vacuum system

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Page 520 of 2189

HONDA CIVIC 1998 6.G Workshop Manual \J
Fuol Iniection Air {FlA) Contlol Valve T$ting
1. Start the engine.
2. Remove the vacuum hose from the fitting on the
intake air duct, and connect a vacuum gauge to the
nose.
NOTE: Engine coolant te

Page 523 of 2189

HONDA CIVIC 1998 6.G Workshop Manual Emission Control System
Exhaust Gas Recirculation (EGR) System (D16yS engine)
Doscription
The EGR system is designed to reduce oxides of nitrogen emissions (NOx) by recirculating exhaust gas through t

Page 525 of 2189

HONDA CIVIC 1998 6.G Workshop Manual Emission Control System
Exhaust Gas Recirculation (EGR) System (D16Y5 engine with GWI (contdl
lTl49il T_he scan tool indicates Diagnostic Trouble Code (OTC) P1491: A malfunction in the Exhaust Gas Re

Page 535 of 2189

HONDA CIVIC 1998 6.G Workshop Manual Emission Control System
Positive Crankcase Ventilation IPCVI System
Descripiion
The Positive Crankcase Ventilation (PCV) system is
designed to prevent blow-by gas from escaping to the
atmosphere. The

Page 536 of 2189

HONDA CIVIC 1998 6.G Workshop Manual 1\
Evaporative Emission (EVAPI Controls
Description
The evaporative emission controls are designed to minimize the amount of fuel vapor escaping to the atmosphere. The
system consists of the foliowing

Page 540 of 2189

HONDA CIVIC 1998 6.G Workshop Manual \J
\
,96 D16Y5 engine,,96 D16r,gngino,,96 Dt6Y8 engine {3edan) 37 D16Y5 engino..97 D16r, engine {coupe: KA, Kc mod-
els. sedan: KA, KC, KL {DX} models. hatchback: all modols}97 Dl6Y8 ongine (s€da

Page 541 of 2189

HONDA CIVIC 1998 6.G Workshop Manual Emission Gontrol System
Evaporative Emission (EVAPI Controls (contdl
(From page 11-271)
I
ECM/PCM CONNECTOR D I32P}
PGl IBLKI
Check the EVAP purge controlsolenoid valvei1. Reconnect the EVAP purge
co

Page 543 of 2189

HONDA CIVIC 1998 6.G Workshop Manual Emission Control System
Evaporative Emission (EVAP) Gontrols (contd)
99 - 0O models only:
The scan tool indicates Diagnostic Trouble Code (DTC) P0451: The Fuel Tank Pressure sensor circuit range/oer