2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1762
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Engine idling, observe the scan tool IAT Sensor parameter. The reading should be between -38 to +149掳C (-36 to +300F) depending on the
current ambient temperature and the vehicle operating conditions.
2. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle
within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the MAF/IAT sensor.
2. Ignition OFF, all vehicles systems OFF, this may take up to for 2 min, test for less than 5 ohm between the IAT low reference circuit terminal
A and ground.
瀚慖f greater than the specified range, test the IAT low reference circuit for an open/high resistance. If the circuit tests normal, replace the
ECM.
3. Ignition ON, verify the scan tool IAT parameter is colder than -39掳C (-38掳F).
瀚慖f warmer than the specified range, test the IAT signal circuit terminal B for a short to ground. If the circuit tests normal, replace the
ECM.
4. Install a 3 A fused jumper wire between the IAT signal circuit terminal B and ground. Verify the scan tool IAT parameter is warmer than 149
掳C (300掳F).
瀚慖f colder than the specified range, test the IAT signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,
replace the ECM.
5. If all circuits test normal, test or replace the MAF/IAT sensor.
Component Testing
Measure and record the resistance of the IAT sensor at various ambient temperatures, and then compare those measurements to the Temperature
Versus Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance) table.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Mass Airflow Sensor with Intake Air Temperature Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Air
Flow Meter/Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, programming, and setup
P0116
DTC P0116 (Without L96)
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.
