Honda Acura NSX 1991 Service Manual page 630

Check the A/T speed sensor signal (V,).
Disconnect the 22-P connector
from the AiT control unit.
Turn the ignition switch ON and
check the voltage between the
No. 18 (PNK/BLK) terminal of the
22-P connector and body ground.
Turn the ignition switch OFF.
Remove the test harness A from
the EPS control unit only.
Check for continuity between the
A4 terminal of the test harness A
and No. 18 fPNK/BLK) terminal of
the 22-P connector.
I
YES
Check for continuity between the
A4 terminal and body ground.
22-P CONNECTOR (To A/T CONTROL UNIT)
(Wire harness side)
I
Substitute a known-good A/T
Do not connect the connec-
NOTE:
tor on the control unit side of test
harness A.
101112131415161718
Repair open in the PNK/BLK wire
between the EPS control unit and
A/T control unit.
Repair short in the PNKlBLK wire
View from
terminal side
WIRE
I
TEST HARNESS A
7 8 9101112
PNK/BLK WIRE