Honda Acura NSX 1991 Service Manual page 443

Self-diagnosis D indicator light
Disconnect the 26P connector
from the control unit.
Turn the ignitrn switch ON.
Measure the voltage between the
A 4 a n d A 2 5
Turn the ignition switch OFF.
Measure the resistance between
t h e A 4 (WHT/BLK) a n d A 2 5
Is the resistance 1 2 - 2 4 B?
Y E S
Disconnect the 2P connector from
the lock-up control solenoid valve
assembly.
Check for continuity between the
A 4 ( W H T I B L K ) a n d A 2 5
Is there continuity?
N O
Connect the 2P connector to the
lock-up control solenoid valve as-
sembly.
I
Check for loose control unit con-
nectors. If necessary, substitute
a known-good control unit and
recheck.
Repair short to power
source in WHTlBLK
wire between the A4
terminal and the lock-up
control solenoid valve
C h e c k f o r o p e n i n
W H T l B L K w i r e b e -
tween the A4 terminal
N O
and the lock-up control
solenoid valve B. If wire
is OK, check the Lock-
up Control Solenoid
Valve g.
Repair short to ground
in WHTlBLK wire be-
Y E S
tween the A4 terminal
and the lock-up control
solenoid valve 8.
I
NOTE: View from terminal side.
WHTlBLK - .+,:: :
0 cl ?
14-55