Honda Prelude 1993 Service Manual page 402

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Table of Contents

Emission Control System

Evaporative Emission {EVAP)

Troubleshooting FLowchart

Controls (cont'd

PURGE CONTROL

OIAPHRAGM VALVE

# 3 VACUUM HOSE

VACUUM PUMP/GAUGE

A 9 7 3 X - 0 4 1 - X X X X X

EVAP CONTROL

Disconnect #3

from the EVAP purge control di-

aphragm valve (on the EVAP con-

trol canister) 6nd connect a

vacuum gauge lo lhe hose.

Start the ongine and allow it to

NOTE: Engine coolant tempera-

ture must be below 158oF {70oC}

Measure voltage between BLK/

YEL (+ ) terminal and REO/GRN

( - ) t e r m i n a l .

Inspoct vacuum hoso

lf OK, .oplaco EVAP

purge control solenoid

ls there battery vollage ?

Measure voltage betwgon BLK/

terminal and body

( T o p a g e 1 1 - 1 6 3 )

{To page 1 1-'163)

Troubleshooting