2010 Cadillac Truck SRX FWD V6-3.0L Page 1129

2010 Cadillac Truck SRX FWD V6-3.0L Page 1129

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0112

- Intake Air Temperature (IAT) Sensor Circuit Low Voltage

DTC P0113

- Intake Air Temperature (IAT) Sensor Circuit High Voltage

DTC P0114

- Intake Air Temperature (IAT) Sensor Circuit Intermittent

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The intake air temperature (IAT) sensor is a variable resistor. It is integrated into the mass air flow (MAF) sensor. The IAT sensor has a signal

circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM)

supplies 5 V to the IAT signal circuit, and a ground for the IAT low reference circuit.

Conditions for Running the DTC

P0112

* The engine run time is greater than 1 s.

* The DTC runs continuously when the above conditions are met.

P0113

* The engine run time is greater than 1 s.

* The DTC runs continuously when the above conditions are met.

P0114

* The ignition is ON or the engine is running.

* This DTC runs continuously within the enabling conditions.

Conditions for Setting the DTC

P0112

The ECM detects that the IAT sensor signal is warmer than 149掳C (300掳F) for greater than 7 s.

P0113

The ECM detects that the IAT sensor signal is colder than -60掳C (-76掳F) for greater than 7 s.

P0114

The ECM detects that the IAT sensor signal is intermittent or has abruptly changed for greater than 4 s.

Action Taken When the DTC Sets