Honda Acura NSX 1991 Service Manual page 217

(From page 1 l-40)
I
I
Is there approx. 5V7
N O
Connect the ECU test harness to
the ECU only, not to the engine
wire harness (page 11-21).
Is there approx. 5 VI
Substitute a known-good ECU
and recheck. If symptomlindica-
tion goes away, replace the
orignal ECU.
ooooooooooooo oooooooo oooooo ooooooooobb
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Measure voltage between YELI
YES
WHT (+) terminal and GRN/WHT
Is there approx. 5V?
I
Is there approx. 5V7
Turn the ignition switch OFF.
I
Reconnect the 3P connector to
the MAP sensor.
Connect the ECU test harness
between the ECU and connector
(page 11-211.
Turn the ignition switch ON.
Repair open or short in
W H T w i r e b e t w e e n
ECU ID171 and MAP
sensor.
If wire is OK, substi-
t u t e a k n o w n - g o o d
ECU and recheck. If
prescribed voltage is
now available, replace
the original ECU.
(cont'd)
11-41