2010 Cadillac CTS Sedan AWD V6-3.6L Page 1337
DTCs P0335, P0336, and P0338 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0335, P0336, and P0338 are Type A DTCs.
Diagnostic Aids
The following conditions could also set the DTCs:
* Physical damage to the crankshaft position sensor or the reluctor wheel
* Excessive play or looseness of the crankshaft position sensor or the reluctor wheel
* Improper installation of the crankshaft position sensor or the reluctor wheel
* Foreign material passing between the crankshaft position sensor and the reluctor wheel
* Excessive air gap between the crankshaft position sensor and the reluctor wheel
* The ECM uses the camshaft position sensors to determine engine speed and position when there is a crankshaft position sensor condition.
* The engine will operate with a crankshaft position sensor condition only if the ECM has stored the learned reference position of the
camshafts in memory. With a crankshaft position sensor condition the engine will go into a limp home mode after a restart. The ECM then
calculates engine speed from one of the camshaft position sensors.
* An intermittent condition in the camshaft position sensor circuits may cause a crankshaft position DTC to set. Inspect the camshaft position
sensor, harness connections, and related wiring, if you suspect this condition.
Reference Information
Schematic Reference
Engine Controls Schematics (LLT) (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)
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/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/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 Verification
1. Ignition ON, observe the DTC information with a scan tool. DTC P0697, P0698, or P0699 should not be set.
瀚慖f a DTC is set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM, LLT) ( See: P Code Charts/P0641).
2. Clear the DTC Info with a scan tool. Attempt to start the engine, observe the DTC information with a scan tool. DTC P0335, P0336, or
P0338 should not set.
3. Observe the scan tool Crankshaft Position Resync parameter, the parameter should always display zero. Move the related
harnesses/connectors of the crankshaft position sensor while observing the parameter, verify the engine does not stumble, or stall, and the
parameter does not increment.
4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the
conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the K20 ECM.
2. Disconnect the harness connector at the B26 crankshaft position sensor.
3. Test for 5 ohm or less between the low reference circuit terminal 1 and ground.
