Honda Acura NSX 1991 Service Manual page 803

Troubleshooting
Problem code 3-7: The throttle opening angle sensor U3TH)
NOTE: If the Check Engine light indicates problem code 7 or "D" indicator light indicates problem code 3, refer
to the appropriate
Remove the ALB 2.3 (20 A) fuse
for more than 3 seconds to reset
TCS control unit.
Start the engine.
Y E S
When the throttle is completely
closed and open, measure the vol-
tage between the TCS control unit
No. 3 terminal and body ground.
l Approximately 0.5 V when
completely close.
l Approximately 4.5 V when
completely open.
Between the 0.5 V (closed)
l
and 4.5 V (open).
Y E S
Substitute a known-good TCS
l
control unit and recheck.
l Check for poor connections or
loose wires.
Turn the ignition switch OFF.
Disconnect the 20-P connector
from the TCS control unit and the
3-P connector from the throttle
angle sensor.
(To page 19-l 17)
19-l 16
troubleshooting flowchart.
intermittent failure.
Check for poor connections or
poor wires.
N O
WIRE
20-P CONNECTOR
View from terminal side.