Honda Prelude 1993 Service Manual page 396

Emission
Exhaust
Gontrol System
Gas Recirculation (EGRI System (cont'dl
EGR VALVE
LIFT
EGR VACUUM
CONTROL VALVE
EGR COI{TROL
SOLENOID VALVE
(
VACUUM PUMP/
GAUGE
A973X-O4t -XXXXX
( T o p a g e I l - 1 5 7 )
{ F r o m p a g e
' 1 1 - 1 5 5 1
Connect battery oower lerminal
to the A terminal of the 2P con-
nector. While watching the vacu-
um gauge, ground the B terminal.
Turn the ignition switch OFF and
inspect the # 16 and #24 hoses
for leaks, restrictions, or mis-
routing.
ls there approx. 2OO mm Hg
(8 in.Hg) within 1 second?
Turn the ignition swith OFF and
reconnect the 2P connector,
Are the hoses OK?
Disconnect the lower hose on
EGR control solenoid valve and
connect a vacuum gauge to the
hose.
Disconnect 3P connector from the
EGR valve lift sensor.
Roobca the EGB vacu-
um control valvg.
ls there 150-250 mrn Hg
16- 1o in.Hg) ol vacuum?
Turn the ignition switch ON.
Measure voltage between RED/
wHT (t ) terminal and GFN^dHT
{- ) terminal.
Measure voltage betwe€n RED/
WHT {+} terminal and bodv
ground.
ls there approx. 5 V?
1 1 - 1 5 6
l T o p a g e 1 1 - ' l 5 7 1