2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1052

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1052

DTC P0111-P0114 (LAU)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

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 P0111

- Intake Air Temperature (IAT) Sensor Circuit Performance

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 Intermittent

Diagnostic Fault Information

Typical Scan Tool Data

Circuit Description

The intake air temperature (IAT) sensor is an integral part of the Intake Manifold Pressure and Air Temperature sensor. The IAT sensor is a

variable resistor that measures the temperature of the intake air. The engine control module (ECM) supplies 5 V to the IAT signal circuit and

supplies a ground to the low reference circuit.

The following table illustrates the difference between temperature, resistance, and voltage:

Conditions for Running the DTC

P0111 Idle Test

* Before the ECM can report DTC P0111 failed, DTC P0101 must run and pass.

* DTC P0112, P0113, P0116, P0117, P0118, P0119, P0125, or P0128 is not set.

* The engine coolant temperature (ECT) at engine start is colder than 120掳C (248掳F).

* The ECT is warmer than 60掳C (140掳F).

* The vehicle speed is less than 3 km/h (2 mph).

* DTC P0111 runs continuously when the above conditions are met for greater than 2 s.