Mazda RX-8 Workshop Manual page 2085

NOTE:
Diagnostic procedure
STEP
1 Verify tire condition.
Inspect the tire size and air
pressure.
Is the tire of specified size and
air pressure?
2 Inspect the vehicle wheel-speed signal.
Display the following ABS CM
DSC CM PIDs using the M-MDS.
(See ON-BOARD DIAGNOSIS
(See ON-BOARD DIAGNOSIS [DYNAMIC
STABILITY CONTROL
WSPD_LF
WSPD_LR
WSPD_RF
WSPD_RR
Are the monitoring values
displayed uniformly while
driving?
Before following the troubleshooting steps, make sure that the Automatic
Transmission On-Board Diagnostic and Automatic Transmission Basic
Inspection are conducted. (See
If a tire of a different diameter from the standard tire is installed, the TCM
determines that the driving mode is the AAS mode, and may change to a
different shift timing from the normal timing.
INSPECTION
[ABS].)
(DSC)].)
Tire of a different diameter from the
standard tire is installed
ABS wheel-speed sensor malfunction
BASIC INSPECTION
YesGo to the next step.
No Replace with a specified tire size or adjust the
air pressure of each specified tire to the
specified value.
YesGo to the next step.
No Perform the following inspections:
If there is any malfunction, repair or replace the
malfunctioning location.
[SJ6A-EL].)
ACTION
ABS wheel-speed sensor
installation inspection
Is the ABS wheel-speed sensor
installation normal?
ABS sensor rotor
installation inspection
Is the ABS sensor rotor
installed twisted?
(may cause output of abnormal
wave pattern at high speeds.)
Are there missing teeth on the
sensor rotor?