Mitsubishi 3000GT Workshop Manual Supplement page 25

SERVICE BRAKES
-
ABS Troubleshooting 35-9
Code
No.21 ,22,23,24 Wheel speed sensor
short circuit Probable cause
These codes are output at the following times:
.
When an
open
ciicuit.canlo!
be fou-nd, but more than one wheel speed
sensor
cloes not outputany
signal during driving at 8 km/h
or
higher.
.
When
a chippecl or
plugged-up rotor tooth,
etc. is detectöd.
.
\i/he.n the.sensor output drops and anti-lock control
is
continuously carried out
due to
a
defective sensor or a warped rotor.
O
a
a
a
o
Malfunction of wheel speed sensor
Mallunction of rotor
Malfunction of wheel bearing
Malfunction of wiring harness or connector
Malfunction of ABS-ECU
Wheel speed sensor installalion
in-
spection.
Measure at
the ABS-ECU connectors
E-10.
.
Disconnect the connector
and mea-
sure from the hamess side.
.
Resistance values
between 46
and
73,
69
and
70,71
and
72.74
and
75.
OK:
1.4
-
1.8 kO
Check the
following connectors.
A-12, A-33, C-26, E-l3 and
E-l5
Check the hamess wire
between eacfr
wheel speed sensor'and
ABS-ECU,
and
repair if neoessary.
1:
Replace the wheel sp€€d sen6or.
.,:,.r1
., j,
I
:
ilil
.
.1:
Code No.26 G-sensor system (open-,
short-circuited or
signal abnormal)
Probable cause
Output is
provided
in
the following cases.
o
G-sensor output drops below 0.5V or
rises above 4.5V
o
G-sensor system hamess
is broken or shorted
.
G-sensor defective
.
Harness and
connectordefective
o
ABS-ECU
delective
Check G-sensor. (Refer
to
P.35-22.1
Measure at ABS-ECU
conneclor
E-10.
.
Disconnect conneclors and
make measure-
ments on harness side.
.
lgnition switch: ON
.
Vollage
between No.62 and 45
OK:
2.3-2.7V
Check the following
connec'tor. D-27
Check harness between G-sensor and
ABS-
ECU, and repalr if necessary.
Check the following connector. E-i0