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DTC C1148, C1158, C1168, C1178

BHE040243000W22

DTC | C1148 C1158 C1168 C1178 | RF ABS wheel-speed sensor/ABS sensor rotor LF ABS wheel-speed sensor/ABS sensor rotor RR ABS wheel-speed sensor/ABS sensor rotor LR ABS wheel-speed sensor/ABS sensor rotor
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 | • 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 (If the sensor rotor is installed at an angle, it may cause output of abnormal wave pattern at high speeds.) • Excessive clearance between the ABS wheel-speed sensor and sensor rotor

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT PID FOR ABNORMAL OUTPUT FROM ABS WHEEL-SPEED SENSOR USING WDS OR EQUIVALENT • Turn the ignition switch off. • Connect the WDS or equivalent to the DLC-2. • Select the following PIDs using the WDS or equivalent: LF_WSPD LR_WSPD RF_WSPD RR_WSPD • 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 5.
No | If there is a difference in speeds of the four wheels, go to the next step.
2 | INSPECT ABS WHEEL-SPEED SENSOR OUTPUT PULSE USING OSCILLOSCOPE • Inspect output voltage pattern from the ABS wheel-speed sensor. (See Voltage Pattern Inspection.) (See Voltage Pattern Inspection.) • Is the output voltage pattern normal? | Yes | Go to Step 5.
No | If there is any malfunction in the front ABS wheel-speed sensor, replace the front ABS wheel-speed sensor, then go to Step 5. (See FRONT ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.) If there is any malfunction in the rear ABS wheel-speed sensor, go to the next step.
3 | INSPECT IF MALFUNCTION OCCURRED DUE TO IMPROPER SENSOR CLEARANCE • Inspect the clearance between the ABS wheel-speed sensor and the rear ABS sensor rotor. Clearance 0.3-1.1 mm {0.012-0.043 in} | Yes | Go to the next step.
No | Replace the rear ABS wheel-speed sensor, then go to Step 5. (See REAR ABS WHEEL-SPEED SENSOR REMOVAL/INSTALLATION.)
4 | VISUALLY INSPECT REAR ABS SENSOR ROTOR FOR ABNORMAL OR MISSING TEETH, DEFORMATION, OBSTRUCTION, AND ANGLED INSTALLATION • Is the result normal? | Yes | Go to the next step.
No | Replace the rear drive shaft, then go to the next step. (See REAR DRIVE SHAFT REMOVAL/INSTALLATION.)
5 | VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory. (See Clearing DTCs Procedures.) • Are the same DTCs present? | Yes | Repeat the inspection from Step 1. If the malfunction recurs, replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION.)
No | Go to the next step.
6 | VERIFY AFTER REPAIR PROCEDURE • Are any other DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC Table.)
No | DTC troubleshooting completed.