2010 Cadillac Truck SRX FWD V6-3.0L Page 1443

2010 Cadillac Truck SRX FWD V6-3.0L Page 1443

The crankshaft position sensor sends a digital signal, which represents an image of the crankshaft reluctor wheel, to the ECM as each tooth on the

wheel rotates past the crankshaft position sensor. The ECM uses each crankshaft position signal pulse to determine crankshaft speed and decodes

the crankshaft reluctor wheel reference gap to identify crankshaft position. This information is then used to determine the optimum ignition and

injection points of the engine. The ECM also uses crankshaft position sensor output information to determine the camshaft relative position to the

crankshaft, to control camshaft phasing, and to detect cylinder misfire.

Conditions for Running the DTC

* DTCs P0101, P0102, P0103, P0340, P0341, P0641, or P0651 are not set.

* The engine is cranking or running.

* The airflow into the engine is greater than 3 g/s.

* The DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

* The ECM detects that the engine is running, but receives less than 51 or more than 65 crankshaft position sensor pulses each engine

revolution for 8 of 10 engine revolutions.

* The ECM detects that the engine is running, but more than 19 resyncs occur within 25 seconds.

* The ECM detects that the engine has been running, but the crankshaft does not sync for 0.4 second.

Action Taken When the DTC Sets

* DTC P0336 is a Type B DTC.

* The camshaft position actuator is commanded to the Home or Parked position.

Conditions for Clearing the MIL/DTC

DTC P0336 is a Type B DTC.

Reference Information

Schematic Reference

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

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

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

Description and Operation

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

Operation/Electronic Ignition System Description)

* Engine Control Module Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Engine

Control Module 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)

* 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

Engine Control Module Scan Tool Information (LF1,LFW) (See: Powertrain Management/Computers and Control Systems/Testing and

Inspection/Scan Tool Testing and Procedures)Engine Control Module Scan Tool Information (LAU) (See: Powertrain Management/Computers

and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures) for scan tool information

Circuit/System Verification

1. Engine idling, observe the scan tool Crankshaft Position Active Counter parameter. The parameter should be incrementing.

2. Engine idling, observe the DTC information with a scan tool. DTC P0335 should not set.

3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed

from the Freeze Frame/Failure Records data.