Honda Acura NSX 1991 Service Manual page 807

Troubleshooting
Problem code 4-9: All wheel sensors.
NOTE: The TCS indicator light comes on when the vehicle is stopped and engine is running and signals from all
four wheels are disconnected for more than three seconds.
Remove the ALB 2.3 (20 A) fuse
for more than 3 seconds to reset
the TCS control unit.
Start the engine.
Y E S
Check the ANTI-LOCK (ALB) light.
NO
Turn the ignition switch OFF.
Check for poor connections or
loose wires at the Anti-lock brake
control unit and check the com-
ponent ground at the Anti-lock
brake control unit.
Y E S
Intermittent failure.
Check for poor connections or
loose wires.
Perform the procedures indicated
Y E S
in the Anti-lock brake trouble-
shooting.
I
N O
Repair and recheck.