Mazda CX-9 Grand Touring 2009 Manual page 485

DETECTION
CONDITION
POSSIBLE CAUSE
DIAGNOSTIC PROCEDURE
DTC C1233, C1234, C1235, C1236 [DSC/RSC] DIAGNOSTIC PROCEDURE
STEP INSPECTION
INSPECT PID FOR ABNORMAL
OUTPUT FROM ABS WHEEL-SPEED
SENSOR USING M-MDS
Turn the ignition switch off.
Connect the M-MDS to the DLC-2.
Select the following PIDs using the
M-MDS:
WSPD_LF
1
WSPD_LR
WSPD_RF
WSPD_RR
Start the engine and drive the vehicle.
Verify that the PIDs of the four ABS
wheel-speed sensors correspond
approximately.
Do the vehicle speeds correspond?
INSPECT IF MALFUNCTION
OCCURRED DUE TO IMPROPER
SENSOR CLEARANCE.
Inspect the clearance between the
ABS wheel-speed sensor and the
ABS sensor rotor.
2008 Mazda CX-9 Grand Touring
2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9
abnormal acceleration that exceeds specification.
Periodic abnormality is detected in the signal wave pattern from the ABS
wheel-speed sensors.
ABS wheel-speed sensor malfunction (low output, metal shavings on
sensor)
ABS sensor rotor malfunction (chipping of sensor rotor teeth)
Poor installation of ABS wheel-speed sensor and/or sensor rotor
Excessive clearance between the ABS wheel-speed sensor and sensor rotor
Yes Go to Step 4.
If there is a difference in speeds of the four
No
wheels, go to the next step.
Yes Go to the next step.
ACTION