Honda Acura NSX 1991, Service Manual

Page: 782 / 1420

Problem code 2: Parking brake signal
NOTE:
l
Before proceeding to the troubleshooting procedure, be sure to perform a running test and check whether the
TCS indicator light comes on or not. If the TCS indicator light does not come on, the system is working properly.
If the TCS indicator light comes on, make sure the parking brake lever is released.
l
When both of the front wheels are running at 10 km/h (6.2 mph) or over and the parking brake is applied for
more than 30 seconds continuously, the TCS control unit will cause the TCS indicator light to come on.
When the parking brake switch is turned OFF, the input signal to the TCS control unit becomes high. When the
parking switch is turned ON, the input signal to the TCS control unit becomes low. Also, when the wire between
the No.5 A) fuse and the TCS control unit is disconnected or cut, the input signal becomes low.
No. 5 A)
Release the oarkina
brake lever
FUSE
(switch
OFF)
the ignition
switch ON.
BRAKE SYSTEM LIGHT
the gauge assembly)
I
Check the BRAKE system light.
B R A K E FLUID
LEVEL SWITCH
BRAK
E
S W I T
C
H
Is the BRAKE system light come
YES
on?
l
Check
for;
Parking brake switch test or
brake fluid level switch
YES
l Replace the BRAKE system
b u l b .
l Repair open in the
Release the parking brake lever
(switch OFF) and turn the ignition
wire between the gauge
and point.
3 4 7 8 9
0 I I 1 2 I9 2
Measure the voltage between the
No. 17 terminal of the 20-P
and body ground when the
ignition switch ON.
View from terminal side
WIRE (PARK)
Is there battery
voltage?
YES
NO
Repair open in the wire
between the point and TCS
control unit.
Check for loose
TCS
control unit
connector. If necessary, substi-
tute a known-good TCS control
unit and recheck.