DIAGNOSIS
TSB Revision
ACTIVE SKID CONTROL SYSTEM (ASC)
35C-115
STEP 13. Check of wheel speed sensor installation status
Check the installation status of wheel speed sensor <RR> (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 <RR> 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 <RR> for loose-
ness. (Refer to GROUP 27
−
On-vehicle Service
P.27-33
.)
Q: Is the check result normal?
YES : Go to Step 15.
NO : Replace the rear wheel hub assembly. (Refer to
GROUP 27
− Rear Axle Hub Assembly
P.27-36
.)
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 rear hub assembly. (Refer
to GROUP 27
− Rear Axle Hub Assembly
P.27-36
.)
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 C1049 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 C1049 set?
YES : Return to Step 1.
NO : This diagnosis is complete.
AC608248AB
Magnetic
encoder
Rear Wheel
bearing
Rear wheel
hub
assembly