Diagnostic Aids
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- An in-line connector could cause an intermittent DTC. Ensure to test for poor connections and pin retention at all in-line connectors.
- If the condition is not present, see INTERMITTENT OR POOR CONNECTIONS under TROUBLE SHOOTING.
- Disconnect the harness connector of the cooling fan clutch from the shroud.
- Inspect the exposed wires between the harness connector and the tubing.
- Inspect the cooling fan clutch harness in order to ensure that the clutch supply voltage circuit is not shorted to the 5-volt reference circuit or the cooling fan speed signal circuit or the low reference circuit.
- DTC P1481 will set if the engine is started without the drive belt on.