DIAGNOSIS
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-103
STEP 13. Check of wheel speed sensor installation status
Check the installation status of wheel speed sensor <FR> (dis-
connection of wheel speed sensor, looseness of mounting bolt,
etc.).
Q: Is the check result normal?
YES : Go to Step 14.
NO : Reinstall the wheel speed sensor <FR> correctly.
(Refer to
P.35C-274
.) Then go to Step 17.
STEP 14. Wheel bearing looseness check
NOTE: Wheel bearing looseness may increase the gap
between the wheel speed sensor and the wheel speed detec-
tion magnet encoder. Check the wheel bearing <FR> for loose-
ness. (Refer to GROUP 26
−
On-vehicle Service
P.26-7
.)
Q: Is the check result normal?
YES : Go to Step 15.
NO : Replace the front hub assembly. (Refer to GROUP 26
− Front Axle Hub Assembly
P.26-9
.)
STEP 15. Check of wheel speed detection encoder
Check the encoder for adhesion of foreign materials or defor-
mation.
Q: Is the check result normal?
YES : Go to Step 16.
NO (Adhesion of foreign materials) : Clean the encoder
so as not to disturb the magnetization pattern on the
encoder while taking care of the magnet, magnetic
substance, and magnetic attraction.
NO (Deformation) : Replace the front hub assembly. (Refer
to GROUP 26
− Front Axle Hub Assembly
P.26-9
.)
STEP 16. Check whether the DTC is reset.
Drive the vehicle at 12mph (20 km/h) or more.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12mph (20 km/h) or higher.
Q: Is DTC C1047 set?
YES : Replace the hydraulic unit (incorporates in
ASC-ECU).(Refer to
P.35C-272
.) Then go to Step 17.
NO : Intermittent malfunction. (Refer to GROUP 00
− How
to Cope with Intermittent Malfunction
P.00-15
.)
STEP 17. Check whether the DTC is reset.
Drive the vehicle at 12mph (20 km/h) or more.
NOTE: The ABS warning light does not turn OFF in some
cases unless the vehicle runs at 12mph (20 km/h) or higher.
Q: Is DTC C1047 set?
YES : Return to Step 1.
NO : This diagnosis is complete.
AC704652 AB
Oil seal
Magnetic
encoder
Wheel
bearing
Hub