INSPECTION PROCEDURE 1. INSPECT UNLOCK WARNING SWITCH ASSEMBLY 
(a) Measure the resistance according to the value(s) in the table below. Standard resistance:
If the result is not as specified, replace the unlock warning switch assembly. Text in Illustration
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Toyota Tundra Service Manual > Sfi System: Intake Air Temperature Circuit Low Input (P0112,P0113)
DESCRIPTION The Intake Air Temperature (IAT) sensor, mounted on the Mass Air Flow (MAF) meter, monitors the IAT. The IAT sensor has a built-in thermistor with a resistance that varies according to the temperature of the intake air. When the IAT is low, the resistance of the thermistor increases. Whe ...
