Diagnostic Aids

When replacing IAT sensor, check TEMPERATURE TO RESISTANCE VALUES table. A "shifted" sensor could result in poor driveability complaints. If Codes 22, 31 and 41 are also set, problem is open in sensor ground circuit.

An intermittent condition may be caused by poor connection, rubbed-through insulation, or a broken wire inside insulation. Check PCM harness connectors for backed-out, improperly mated, broken locks, improperly formed, or damaged terminals, and poor terminal-to-wire connections before component replacement.

Fig 1: Code 24 Schematic (LSi) Intake Air Temperature Sensor Circuit, Open Or Shorted Circuit

Fig 2: Code 24 Flow Chart (LSi) Intake Air Temperature Sensor Circuit, Open Or Shorted Circuit