Honda Prelude 1993 Service Manual page 313

ls there manifold vacuum?
ls there approx. 3 V?
{From pag6 1 1-68)
Start the engine.
Turn the ignition switch OFF.
Connect ths test harness between
the ECM and connectors (see
p a g e 1 1 - 4 5 ) .
Turn the ignition switch ON.
Measure voltage between D17
( . t ) t e r m i n a l a n d 0 2 1 ( - )
lermrnal,
Start the engine and allow it to
idle.
ls there approx. 1 V?
Subltitute a known-good ECM
and rocheck. ll symptom/indica-
tion 9063 away, ropl6co tho o.igi-
nal ECM.
T-FITTING
3 V ?
n
D l 7 t + l D 2 1 { - }
1 1 - 6 9