Spectrum 3.0L GM - DTC 105 MAT Short to High;Ground;Open

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DTC 105 MAT Short to High/Ground/Open
Conditions for Setting the DTC
 Key ON
 Manifold Air Temp Short Circuit to High, MAT voltage greater than 4.95 V.
 Manifold Air Temp Short Circuit to Ground, MAT voltage less than 0.05 V
 Manifold Air Temp Open Circuit, MAT voltage greater than 4.88V but less than 4.94V
Circuit Description
The TMAP is a combined manifold air temperature (MAT) and manifold absolute pressure (MAP) sensor. A
temperature-sensitive resistor is used in the TMAP Sensor located in the intake manifold of the engine. It is
used to monitor incoming air temperature and pressure; and the output, in conjunction with other sensors,
is used to determine the airflow to the engine. The ECU provides a voltage divider circuit so that when the
air is cool, the signal reads higher voltage, and lower when warm.