Honda Acura NSX 1991 Service Manual page 450

Electrical Troubleshooting
Self-diagnosis D indicator light
blinks seven times.
Disconnect the 26P connector
from the countrol unit.
Turn the ignition switch ON.
Measure the voltage between the
A 5
Is there voltage?
N O
Turn the ignition switch OFF.
Measure the resistance between
t h e A 5 (BLU/YEL) a n d A 2 5
Is the resistance 12-24 D?
Y E S
Disconnect the 2P connector from
the shift control solenoid valve as-
sembly.
Check for continuity between the
A 5
Is there continuity?
N O
Connect the 2P connector to the
shift control solenoid valve as-
sembly.
Check for loose control unit con-
nectors. If necessary, substitute
a known-good control unlt and
recheck.
14-62
A 2 5
Repair short to power
source in BLUlYEL
between the A5 termi-
nal and the shift control
solenoid valve A.
I
C h e c k f o r o p e n i n
wire between
the A5 terminal
shift control solenoid
valve A. If wire is OK,
check the Shift Control
Solenoid Valve A.
A 2 5
Repair short to ground
in BLUlYEL
tween the A5 terminal
and the shift control
solenoid valve A.
, r BRN'WHT--BLu""-,s ,
wire
r
and the
r
wire be-
NOTE: View from terminal side.
0 V?
1
0 II?