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Home >> Chevrolet >> 2008 >> Impala SS >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC B1424 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the theft deterrent module (TDM).
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance. If the circuits test normal, replace the TDM.
  3. Measure and record the voltage at the battery terminals. Ignition ON, measure the voltage between the accessory voltage circuit terminal 2 and the ground. Verify that the voltage readings do not differ more than 1 volt.
    • If greater than the specified value, test the accessory voltage circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the TDM.
  4. Refer to Charging System Test .
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