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Home >> Chevrolet >> 2015 >> Impala Limited LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 52 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B2500: Driver Window Switch >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the A23D Door Latch Assembly-Driver. Ignition ON.
  2. Test for greater than 10 volts between the signal circuit terminal 4 and ground
    • If 10 volts or less 
    1. Ignition OFF, disconnect the harness connector at the S79D Window Switch-Driver.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the S79D Window Switch-Driver.
    • If greater the 10 volts 
  3. Test or replace the A23D Door Latch Assembly-Driver.
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