Checking the wiring and sensor
Check the power supply cables located between the relevant wheel sensor:
Diagnostic trouble code ABS-0010 Front LH wheel sensor
#1 and control unit #34
Diagnostic trouble code ABS-0020 Front RH wheel sensor
#1 and control unit #4
for an open circuit as described in Open-circuit, permanent faults , a short circuit to ground as described in Short-circuit to ground, permanent faults , and a short circuit to voltage supply, as described in Short-circuit to supply voltage. Permanent faults .
HINT: Upon ignition, the voltage in the wire should be approximately 1 V below Ubat measured to ground point.
Check the signal wires between the relevant wheel sensor:
Diagnostic trouble code ABS-0010 Front LH wheel sensor
#2 and control unit #33
Diagnostic trouble code ABS-0020 Front RH wheel sensor
#2 and control unit #3
for an open circuit as described in Open-circuit, permanent faults , a short circuit to ground as described in Short-circuit to ground, permanent faults , and a short circuit to voltage supply, as described in Short-circuit to supply voltage. Permanent faults .
With the sensor connected, check the sensor by turning on the ignition and measuring the signal obtained from the sensor between the test box:
Diagnostic trouble code ABS-0010 Front LH wheel sensor
#33 and ground point.
Diagnostic trouble code ABS-0020 Front RH wheel sensor
#3 and ground point.
The voltage should vary by approximately 1 V when the sensor wheel rotates. If the voltage supply is faulty, replace the wheel sensor.
Do the necessary corrective action.
Additional information:
- To connect the test box, see Connecting the ABS/DSTC breakout box .
- To replace the wheel sensor, see Wheel sensor, front, replacing .
- For disconnection of the control unit, see Replacing the control module for ABS and dynamic stability and traction control (DSTC) .
- For additional values, see Signal specification, ABS/DSTC (dynamic stability and traction control) control module .
- Continue
Refer to Verification