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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> Driver Information Center (DIC) Switch(es) Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch assembly.
  2. Ignition OFF, test for less than 1 ohm of resistance between the ground reference circuit and ground.
    • If greater than 1 ohm, test the ground reference circuit for an open/high resistance.
  3. Ignition ON, verify that all scan tool DIC Switch parameters are Inactive.
    • If all DIC switch parameters are not Inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC).
  4. Ignition ON, install a 3A fused jumper wire between the DIC switch signal circuit and the ground reference circuit. Verify that all scan tool DIC switch parameters are Active.
    • If not Active, test the DIC switch signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC.
  5. If all circuits test normal, test or replace the DIC switch.
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