Mitsubishi 1992 3000GT, Service Manual

Page: 867 / 1308

SERVICE BRAKES Anti-lock Braking System Troubleshooting
Check flow connected with
NOTE
speed sensor
Check speed sensor harness and connector connection
and then observe with oscilloscope. (Refer to
Is the resistance value of the
sensor part normal?
Standard value: 0.8-1.2
Yes
Malfunction of wheel speed
Is the resistance value at the ECU
tor normal?
Standard value: 0.8-1.2
Yes
Harness wire for wheel speed
sensor circuit is broken Repair harness.
Is the front wheel speed sen-
sor-to-rotor clearance nor-
mal?
Standard value:
0.3-0.9 mm
in.)
Yes
Yes
Is the rear speed sensor
mounting
surface-to-rotor
tooth flank (all around) dis-
tance normal?
Standard value:
28.15-28.45 mm (1.11-1.12
in.)
Yes
Yes
Check the output of each
wheel speed sensor with an
oscilloscope, including the
waveform. (Refer to
Is the output voltage for each
wheel speed sensor over the
standard value and is the
veform normal?
Yes
Replace the ABS ECU and
there is a malfunction of
ABS ECU when this diagnos-
tic trouble code reoccurs
often.
TSB Revision