DTC 15
WHEEL SPEED SENSOR CIRCUITRefer to DTC 11.
CIRCUIT OPERATION
Refer to DTC 11.
ABS DTC SET CONDITION
Outputs when output signal produced by any of wheel speed sensor is abnormal (excluding short and open-circuits).
TROUBLESHOOTING HINTS
The most likely causes for DTC is to set are:
- Improper installation of the wheel speed sensor
- Malfunction of the wheel speed sensor
- Damaged wiring harness and connector
- Malfunction of the ABS rotor
- Malfunction of the wheel bearing
DIAGNOSIS
STEP 1. Check the wheel speed sensor installation.
If the wheel speed sensor is bolted securely in place at the front knuckle or the rear axle housing, go to Step 2.
If the wheel speed sensor is not bolted securely in place, install it properly.
Then confirm that a diagnostic trouble code is not output.
STEP 2. Check the wheel speed sensor output voltage.
Output voltage:
When measured with a voltmeter: 70 mV or more
When measured with oscilloscope (maximum voltage): 200 mV or more
If the voltage is below the specification, go to Step 3.
If the voltage meets the specification, go to Step 4.
STEP 3. Check the wheel speed sensors.
If there is damage in any of the check items, replace the damaged wheel speed sensor.
Check items:
Wheel speed sensor internal resistance
Standard value: 1.3 - 1.5 k ohms
Wheel speed sensor insulation resistance
Standard value: 100 k ohms
Toothed ABS rotor check
Then confirm that a diagnostic trouble code is not output.
If all the wheel speed sensors are in good condition, go to Step 5.
STEP 4. Check harness connector A-85 for damage.
If the harness connector is damaged, repair or replace it. Then confirm that a diagnostic trouble code is not output.
STEP 5. Check the toothed ABS rotor.
Check whether ABS rotor teeth are broken or damaged.
If any ABS rotor teeth are broken or damaged, replace the rotor.
Then confirm that a diagnostic trouble code is not output.
If the ABS rotors are in good condition, go to Step 6.
STEP 6. Check the wheel bearing.
Then confirm that a diagnostic trouble code is not output.