2010 Cadillac Truck SRX FWD V6-3.0L Page 1131

2010 Cadillac Truck SRX FWD V6-3.0L Page 1131

瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K20 ECM.

7. If all circuits test normal, test or replace the B75B MAF/IAT sensor.

Component Testing

Measure and record the resistance of the B66 IAT sensor at various ambient temperatures, then compare those measurements to the Temperature

Versus Resistance - Intake Air Temperature Sensor (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature

Versus Resistance - Intake Air Temperature Sensor) table.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.

* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (LF1) (See: Powertrain Management/Computers and Control

Systems/Air Temperature Sensor ( Ambient / Intake )/Service and Repair)Mass Airflow Sensor with Intake Air Temperature Sensor

Replacement (LAU) (See: Powertrain Management/Computers and Control Systems/Air Temperature Sensor ( Ambient / Intake )/Service

and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming

P0113

DTC P0112, P0113, or P0114 (LF1)

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 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)