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For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 LaCrosse 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Driver Information Center (DIC) Switch Malfunction

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

DIC Fuel Switch Signal

1

1

1

1

DIC Select Menu Switch Signal

1

1

1

1

DIC Set/Reset Switch Signal

1

1

1

1

DIC Odometer Switch Signal

1

1

1

1

DIC Gage Switch Signal

1

1

1

1

DIC Switch Ground

--

1

1

1

1. Driver Information Center (DIC) Switch Malfunction

Circuit/System Description

The driver information center (DIC) switch is controlled by the IPC. Power and ground is provided to the DIC from the instrument panel cluster. The IPC also provides power to the DIC switch and the DIC switch signal circuit is pulled up to battery voltage in the IPC. The DIC switch input to the DIC is grounded when a switch is activated. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs.

Reference Information

Schematic Reference

    •  Instrument Cluster Schematics
    •  Driver Information System Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the DIC.
  2. Ignition OFF, test for less than 1 ohm between the DIC ground circuit terminal 4 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that all of the scan tool DIC Switch parameters are Inactive or Off.
    4. ⇒If any are not the specified value, test the signal circuit listed below for a short to ground. If the circuits test normal, replace the IPC.
    • DIC Fuel Switch Signal Terminal 9
    • DIC Select Switch Signal Terminal 8
    • DIC Set/Reset Switch Signal Terminal 7
    • DIC Odometer Switch Signal Terminal 5
    • DIC Gage Switch Signal Terminal 6
    • DIC Switch Signal Terminal 9 (Base DIC)
  4. Ignition ON, install a 3-amp fused jumper wire between the signal circuits listed below and the ground circuit terminal 4. Verify all of the scan tool DIC switch parameters are Active or On.
    5. • DIC Fuel Switch Signal Terminal 9
    • DIC Select Switch Signal Terminal 8
    • DIC Set/Reset Switch Signal Terminal 7
    • DIC Odometer Switch Signal Terminal 5
    • DIC Gage Switch Signal Terminal 6
    • DIC Switch Signal Terminal 9 (Base DIC)
    ⇒If any are not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the IPC.
  5. If all circuits test normal, test or replace the DIC switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Driver Information Display Switch Replacement
    •  Control Module References for the IPC replacement, setup and programming