2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2035

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2035

The 4X camshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an

output signal circuit. The camshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor

detects magnetic flux changes between the peaks and valleys of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth

rotates past the camshaft position sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output

pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with two narrow, and two wide output pulses per camshaft

revolution that represent an image of the camshaft reluctor wheel. The frequency of the camshaft position sensor output depends on the velocity of

the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to sequence the

ignition timing and fuel injection events for the engine. The ECM also uses camshaft position sensor output information to determine the camshaft

relative position to the crankshaft, to control the camshaft position actuator if equipped, and for limp-home operation.

Conditions for Running the DTC

* DTC P0641, or P0651 is not set.

* The engine is cranking or running.

* DTCs run continuously when the above conditions are met.

Conditions for Setting the DTC

Important: The ECM detects engine movement by sensing the airflow through the MAF sensor, when airflow is greater than 3 grams per

second, or by sensing crankshaft position sensor pulses.

* The ECM detects that the engine was started, but has received less than 2 or more than 8 camshaft position sensor pulses during the first

engine resolution.

* The ECM detects that the engine has started and is running, but receives less than 398 or more than 402 camshaft position pulses per 100

engine cycles in 800 of 1000 engine cycles.

Action Taken When the DTC Sets

* DTC P0341 is a Type B DTC.

* The camshaft position actuator, if equipped, is commanded to the parked position.

* The ignition system defaults to a failed camshaft position sensor limp home mode.

Conditions for Clearing the DTC

DTC P0341 is a Type B DTC.

Diagnostic Aids

* With this DTC set, the engine may crank for an extended period of time during start-up.

* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (See:

Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).

Reference Information

Schematic Reference

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

Connector End View Reference

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

Description and Operation

Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic

Ignition System Description)

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)