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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 >> Odometer Trip/Reset Switch 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 driver information center (DIC) switch connector.
  2. Test for less than 1 ohm of resistance between the DIC switch ground circuit and ground.
    • If greater than 1 ohm, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Trip Reset Switch parameter is Inactive.
    • If not inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the IPC.
  4. Install a 3A fused jumper wire between the signal circuit and ground. Verify the scan tool Trip Reset Switch parameter is Active.
    • If not active, test the 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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