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Home >> Chevrolet >> 2006 >> Epica LTZ >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 2.5L (LBK) - DTC P2122 To DTC P2422 >> DTC P2159 >> Component Testing
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Component Testing

IMPORTANT: This procedure is for vehicles without ABS. If the wheel speed sensor harness is damaged in any way, DO NOT repair the harness.
  1. Ignition OFF, disconnect the harness connector of the wheel speed sensor.
    NOTE: Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.
  2. Raise and support the drive wheels.
  3. Engine idling, place the transmission into 2nd gear or drive for an automatic. Test for 70 mV AC between the wheel speed sensor signal circuit and ground circuit.
    • If less than the specified value, replace the wheel speed sensor.
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