Honda Acura NSX 1991 Service Manual page 946

Troubleshooting
From page 22-57
Start the engine and connect a
jumper wire between test harness
terminal Al 5 and body ground.
Does compressor clutch engage?
Y E S
Using a jumper wire, connect C3
test harness terminal to body
ground.
Does compressor clutch engage?
Y E S
Turn the ignition switch OFF.
A
To page 22-59
22-58
E C U
A l 5
I
Turn the ignition switch OFF.
To page 22-61
Substitute a known-good PGM-FI-
ECU and recheck. If symptomiindi-
NO
cation goes away, replace the
original ECU.
I
ECU TEST HARNESS
c 3