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Home >> Buick >> 2012 >> Regal GS, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Driver Information Center Switch Malfunction - DTC B3567 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the S78 turn signal/multifunction switch.
  2. Test for less than 30 Ω between the low reference circuit terminal 6 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal replace the P16 instrument cluster.
  3. Ignition ON, test for 4.8-5.2 V between the harness connector signal circuit terminal 5 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal replace the P16 instrument cluster.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal replace the P16 instrument cluster.
  4. Test for greater than 10 V between the signal S78 turn signal/multifunction switch circuit terminal 12 and ground.
    • If not within the specified range, test the signal for an open/high resistance or a short to ground. If the circuit tests normal replace the P16 instrument cluster.
  5. If all circuits tests normal, replace the S78 turn signal/multifunction switch.
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