Honda Acura NSX 1991 Service Manual page 441

D indicator
blinks while Service Check
light
Blinks
10
Blinks
11
OFF
OFF
OFF
Blinks
If the self-diagnosis D indicator light does not blink, perform an inspection according to the table listed below.
D indicator light does not come on for 2 seconds after ignition is first
D indicator light is on steady, not blinking whenever the ignition is on.
Lock-up clutch does not have duty operation (ON-OFF).
Lock-up clutch does not engage.
Fails to shift from 2nd to 1st gear after releasing the brake pedal from
a stop when in the D position.
l If a customer describes the symptoms for codes 3,6, or 11, yet the D indicator light is not blinking, it will be necessary to recrs
ate the symptom by test driving, and then checking the D indicator light with the ignition still ON.
l
If the D indicator light displays codes 1,2,3,8,11
If any of the fuses have blown, repair them and then recheck.
l
If the D indicator light displays codes other than those listed above or stays lit continuously, the control unit is faulty.
l
Sometimes the D indicator light and the Check Engine light may come on simultaneously. If so, check the PGM-FI system ac
cording to the number of blinks on the PGM-FI ECU self-diagnosing indicator, then reset the memory by removing the CLOCk
fuse in the main relay box for more than IO seconds. Drive the vehicle for several minutes at speed over 30 mph (50 Km/h)
then recheck the lights.
NOTE: Disconnecting the CLOCK fuse also cancels the radio preset stations and the clock setting. Make note of the radic
Possible Cause
Disconnected NC speed sensor
l
connector
Short or open in the NC speed
l
sensor wire
Disconnected water temperature
l
sensor connector
Short or open in the water
l
temperature sensor wire
Faulty water temperature sensor
l
Disconnected gauge assembly
l
connector
. Short or open in tachometer wire
Faulty tachometer
l
Short or open in FAS wire
l
Trouble in PGM-FI unit
l
Disconnected NM speed sensor
l
connector
Short of open in NM speed
l
sensor wire
Faulty NM speed sensor
l
Disconnected linear solenoid
l
connector
Short or open in linear solenoid
l
wire
Faulty linear solenoid
l
Symptom
or 16, check first the No. 9,13 and 18 fuse before electrical troubleshootinc
Symptom
Lock-up clutch does not engage.
l
Lock-up clutch does not engage.
l
Lock-up clutch does not engage.
l
Transmission jerks hard when
l
shiftina.
Transmission jerks hard when
l
shifting.
Transmission jerks hard when
l
shifting
Lock-up clutch does not engage.
l
Probable Cause
Check A/C signal
with A/C on
Check brake light
signal.
Refer to
1 4 - 6 4
1 4 - 6 6
1 4 - 6 7
1 4 - 6 8
1 4 - 7 0
1 4 - 7 3
Ref. page
14-74
14-76
14-77
14-78