2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1774

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1774

Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* 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 Testing

1. Inspect for the following conditions:

* Vacuum hoses for splits, kinks, and proper connections as shown on Vehicle Emission Control Information label

* Inspect thoroughly for any type of leak or restriction

* Air leaks at throttle body mounting area and intake manifold sealing surfaces

* Throttle body for dirt, debris, and coking-Refer to Throttle Body Cleaning (See: Powertrain Management/Fuel Delivery and Air

Induction/Throttle Body/Service and Repair/Procedures).

2. Allow the engine to reach operating temperature. Observe the MAP Sensor Voltage parameter with a scan tool. Voltage should be more than

0.8 volt and less than 4 volts.

瀚慖f more than 4 volts or less than 0.8 volt, refer to DTC P0106 (See: P Code Charts/P0106).

3. Idle the engine. Observe the MAP Sensor kPa parameter with a scan tool. Increase the engine speed slowly and then back to idle. The MAP

sensor kPa should change smoothly and gradually as engine speed is increased and returned to idle.

瀚慖f the MAP sensor kPa does not change, refer to DTC P0106 (See: P Code Charts/P0106).

4. Take a snapshot of the engine data list while performing the actions listed below. The mass air flow (MAF) sensor g/s should change

smoothly and gradually as the engine speed is increased and is returned to idle.

* Idle the engine.

* Increase the engine speed slowly to 3,000 RPM, then back to idle.

* Exit from the snapshot and review the data.

* Observe the Mass Air Flow (MAF) Sensor parameter frame by frame with a scan tool. The MAF sensor g/s should change smoothly and

gradually as the engine speed is increased and is returned to idle.

瀚慖f the MAF sensor g/s does not change smoothly and gradually as the engine speed is increased and is returned to idle, refer to DTC

P0101 or P1101 (See: P Code Charts/P0101).

5. Inspect the throttle body for the following conditions:

* Loose or damaged throttle blade

* Broken throttle shaft

* Any throttle body damage

瀚慖f any of these conditions exist, replace the throttle body assembly.

Repair Instructions

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

* Throttle Body Assembly Replacement (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and

Repair/Removal and Replacement)