2010 Cadillac CTS Sedan AWD V6-3.0L Page 1468

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1468

* Excess deposits in the Q38 throttle body. Refer to Throttle Body Inspection and 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.

Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and

Repair/Removal and Replacement)Throttle Body Assembly Replacement (LLT) (See: Powertrain Management/Fuel Delivery and Air

Induction/Throttle Body/Service and Repair/Removal and Replacement)

With Y41

DTC P0513 (with Y41)

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 remote control door lock receiver (RCDLR) sends the prerelease password to the engine control module (ECM) via the serial data circuit. The

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

RCDLR 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 RCDLR 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 when a valid calculation is received.

* A history DTC will be cleared after 40 malfunction-free ignition cycles or when a scan tool is used to clear DTCs.