2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2107

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2107

Circuit/System Testing

Verify none of the following conditions exist:

P0506

* Excess deposits in the Q38 throttle body. Refer to Throttle Body Cleaning (See: Powertrain Management/Fuel Delivery and Air

Induction/Throttle Body/Service and Repair/Procedures)

* Restricted exhaust

* Mechanical conditions that limits engine speed

* Parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition.

瀚慖f a condition is found, repair as necessary.

P0507

* Vacuum leaks

* A throttle valve that does not close correctly

* Verify the correct operation of the crankcase ventilation system. Inspect for the following conditions:

- The routing of the positive crankcase ventilation (PCV) system

- Vacuum leaks in the PCV system-Refer to Crankcase Ventilation System Inspection/Diagnosis (See: Powertrain Management/Emission

Control Systems/Positive Crankcase Ventilation/Testing and Inspection)

瀚慖f a condition is found, repair as necessary.

Repair Instructions

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

P0513

DTC P0513

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 Descriptor

DTC P0513

- Theft Deterrent Key Incorrect

Circuit/System Description

The theft deterrent module (TDM) sends the prerelease password to the engine control module (ECM) via the serial data circuit. The ECM then

sends a challenge to the TDM. Both the ECM and TDM perform a calculation on this challenge. If the calculated response from the TDM equals

the calculation performed by the ECM, the ECM will allow vehicle starting.

Conditions for Running the DTC

Ignition is in the ACCESSORY or RUN position.

Conditions for Setting the DTC

The calculated response from the TDM does not equal the calculation performed by the ECM.

Action Taken When the DTC Sets

* The security indicator will illuminate.

* Vehicle starting will be disabled.

Conditions for Clearing the DTC

* A current DTC P0513 will be cleared when a valid calculation is received.