DTC C1148, C1158, C1168, C1178


id040200801200

DTC
C1148
C1158
C1168
C1178
RF ABS wheel-speed sensor/ABS sensor rotor system
LF ABS wheel-speed sensor/ABS sensor rotor system
RR ABS wheel-speed sensor/ABS sensor rotor system
LR ABS wheel-speed sensor/ABS sensor rotor system
DETECTION CONDITION
•  Vehicle wheel speed signals of any of the four vehicle wheels indicate abnormal acceleration that exceeds specification.
•  Vehicle wheel speed signals of any of the four vehicle wheels indicate speed that exceeds specification.
POSSIBLE CAUSE
•  Excessive clearance between the ABS wheel-speed sensor and sensor rotor
•  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

Diagnostic procedure

STEP

INSPECTION

ACTION

1
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
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?
Yes
Go to Step 4.
No
If there is a difference in speeds of the four wheels, go to the next step.
2
INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE.
•  Inspect the clearance between the ABS wheel-speed sensor and the ABS sensor rotor.
•  Is the clearance normal?
Yes
Go to the next step.
No
Replace the ABS wheel-speed sensor, then go to Step 4.
3
VISUALLY INSPECT ABS SENSOR ROTOR FOR FOREIGN MATERIAL ADHERING OR IMPROPER INSTALLATION
•  Is the result normal?
Yes
Go to the next step.
No
Replace the front drive shaft, rear wheel hub component (2WD) or rear drive shaft (4WD), then go to the next step.
4
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Clear the DTC from the memory.
•  Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more.
•  Are the same DTCs present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
No
Go to the next step.
5
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
No
DTC troubleshooting completed.