Acura NSX 1991 Manual page 792

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NOTE: A short to ground in the ORN wire can be caused by a short in any component connected to it.
Vehicle Speed Sensor (VSS) Test
Speedometer does not work.
Inspect No. 5 (15 A) fuse in the
under-dash fuse box before
testing.
Disconnect the 3-P connector
from the VSS.
Turn the ignition switch ON (II).
Measure voltage between the YEL
wire terminal and the BLK wire
terminal in the harness side of the
3-P connector.
Is there battery voltage?
Measure voltage between the
ORN and the BLK wire terminals.
Is there about 5 V?
(To page 23-132)
Table of Contents
View from
terminal side
Check for continuity between the
BLK terminal and body ground.
Is there continuity?
Repair open in the YEL wire be-
tween the VSS and under-dash
fuse box.
Repair open in the ORN wire or
short to body ground.
, BLK 3-P CONNECTOR
VSS
Repair open between
the VSS and ground
G101.