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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Engine Cooling System) >> Diagnostic Information and Procedures >> Cooling Fan Always On >> Circuit/System Verification

Circuit/System Verification

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. If DTCs P0480 or P0481 are set, then perform those diagnostics first.
  2. Ignition ON, verify with a scan tool that the ECM is not commanding fan activation.
  3. Ignition ON, observe that the fan is not activated.
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