Honda Acura NSX 1991 Service Manual page 628

Problem code 3 1:
Turn the ignition switch ON.
Do the other indicator lights (ALB,
TCS, etc.) come on?
Y E S
Turn the ignition switch OFF.
Connect test harness A to the
wire harness only.
Turn the ignition switch ON.
Check the voltage between the
A8 (+ ) and All (- ) terminals of
the test harness A.
Substitute a known-good EPS
control unit and recheck.
Check the No.5 (15 A) fuse and
replace if necessary. ,
TEST HARNESS A
17-59