Honda Acura NSX 1991 Service Manual page 234

-Troubleshooting Flowchart
Self-diagnosis Check Engine light indicates code 17: A problem in the Vehicle Speed Sensor circuit.
, I
The signal generated by the speed sensor, produces pulses when the front wheels turn.
reported on.
jumped (page 1 l-18). CODE
17 is indicated.
is Check Engine light on and
does it indicate CODE 177
Y E S
Turn the ignition switch ON.
Slowly rotate left rear wheel and
measure voltage between C2 I+)
terminal and A26 f-1 terminal.
Does voltage pulse 0 V and 5 V?
Y E S
S u b s t i t u t e a k n o w n - g o o d
ECU and recheck. If symptom/
indication goes away, replace
the original ECU.
Vehicle Speed Sensor
Intermittent faliure, system is OK
at this time.
N O Check for poor connections or
loose wires at and (located at left
shock tower).
sure lifts are placed
properly. (Sea page
l - 8 . )
I
Substitute
ECU and recheck. if symp-
tom/indication
replace the original ECU.
wire between ECU
a known-good
goes away,