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Diagnostic Aids

When replacing IAT sensor, refer to INTAKE AIR TEMP SENSOR RESISTANCE table to evaluate the possibility of a "shifted" sensor. A "shifted" sensor could result in poor driveability complaints. For IAT sensor specification, refer to I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.

INTAKE AIR TEMP SENSOR RESISTANCE

Temperature °F (°C) Ohms
210 (99) 190
160 (71) 400
100 (38) 1250
70 (21) 2350
40 (4) 4780
20 (-7) 8100
0 (-18) 14,650
Fig 1: Code 25 Schematic, Intake Air Temp. (IAT) Sensor Ckt. High Temperature Indicated
G92J26285
Fig 2: Code 25 Flow Chart, Intake Air Temp. (IAT) Sensor Ckt. High Temperature Indicated
G92A26575