Honda Acura NSX 1991 Service Manual page 805

Troubleshooting
Problem code 4-1: Wheel
4-2: Wheel sensor L. Front
NOTE: The m indicator light comes on when the average speed of either the right or left front wheels exceeds
15 km/h (9.3 mph) and the ANTI-LOCK BRAKE control unit signal stops for more than 3 secons.
for more than 3 seconds to reset
Test drive for approximately 3
miles at more than 15 km/h (9.3
system for a / .
and 4-8 indicated?
Y E S
Check the Anti-lock brake system
for a problem code.
Are problem codes 4-1,4-Z, 4-
and 4-8 indicated?
Y E S
Perform the repair according to
the Anti-lock brake control unit
troubleshooting chart.
Measure the voltage between the
TCS control unit 20-P connector
No. 7,9,18 and 20 terminals and
body ground.
there is 0 V
Make sure that the
when the wheel is stopped and
approximately 2 V when the
wheel is rotated by hand.
loose wires.
sensor R. Front. 4-4: Wheel sensor R. Rear.
4-8:
Wheel sensor L. Rear.
intermittent failure.
Check for poor connections or
loose wires.
NOTE: Use the 10 V range or a similar range in the
analog tester.
20-P CONNECTOR
I 2 3 4 51m[S
0 I I 12 13 14&5(16),17
View from terminal side.
7 8 9