XC90 2.5T AWD L5-2.5L Turbo VIN 59 B5254T2 (2003)
Repair wiring and cable terminals, using appropriate procedures.
In theory, the resistance across contacts, leads and terminals should be 0 [ohm]. However, there is always some resistance due to terminal oxidation.
If this resistance becomes too great the result will be a malfunction. The magnitude of the resistance before it causes a malfunction depends on the circuit
Check the cables visually according to "Check Terminals Visually."
NOTE: Do not apply rust solvent spray or grease to the Heated Oxygen Sensor (HO2S) or combined instrument panel connectors.
Disconnect the battery negative terminal
Use compressed air to clean the disconnected connector
Apply rust solvent spray 1161422 to the disconnected connectors
Blow clean using compressed air.