Honda Acura NSX 1991 Service Manual page 438

Troubleshooting Procedures
When the A/T control unit senses an abnormality in the input or output systems, the D indicator light in the gauge assembly will
blink. However, when the Service Check Connector (located to the lower right of the glove compartment) is connected with a
jumper wire, the D indicator light will blink the problem code when the ignition switch is turned on.
When the D indicator light has been reported on, connect the two terminals of the Service Check Connector together. Then turn
on the ignition switch and observe the
Problem codes 1 through 9 are indicated by individual short blinks, Problem codes 10 through 16 are indicated by a series
of long and short blinks. One long blink equals 10 short blinks. Add the long and short blinks together to determine the
problem code. After determining the problem code, refer to the electrical system Symptom-to-Component Chart on page
14-52.
s h o r t
long
Some PGM-FI problems will also make the D indicator light come on. After repairing the PGM-FI system, disconnect the CLOCK
fuse (7.5 A) in the main relay box for more than 10 seconds to reset the A/T control unit memory.
NOTE: Disconnecting the CLOCK fuse also cancels the radio preset stations and the clock setting. Make note of the radio
presets before removing the fuse so you can reset them.
indicator light.
D
LIGHT
short
SERVICE CHECK
CONNECTOR
Connect with jumper wire.
See Problem CODE 2
See Problem CODE 14