P0336
DTC P0336
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0336
- Crankshaft Position (CKP) Sensor A Performance
Diagnostic Fault Information
Circuit/System Description
The crankshaft position (CKP) sensor contains 2 hall-effect switches in one housing. This sensor configuration produces 2 separate CKP sensor pulses. These pulses occur when 2 interrupter rings, mounted to the crankshaft balancer, the outer one containing 18 evenly spaced windows and blades, the inner one containing 3 unevenly spaced windows and blades, pass by the sensors. The 18X sensor produces 18 pulses per engine revolution. The 3X sync sensor produces 3 pulses per engine revolution, each pulse representing a pair of companion cylinders. Both sensors are connected directly to the ignition control (IC) module. The sensor wiring includes the following circuits:
* The CKP sensor 1 signal circuit
* The CKP sensor 2 signal circuit
* A shared 12-volt reference circuit
* A shared low reference circuit
* A medium resolution engine speed signal circuit
The IC module uses the sensors to determine the engine position and speed. A signal converter within the IC module, using the 18X CKP sensor 1, produces a digital 18X output signal to the powertrain control module (PCM) on the medium resolution engine speed signal circuit. The PCM monitors the medium resolution engine speed signal circuit for errors.
Conditions for Running the DTC
* The engine is cranking or running for more than 3 seconds.
* The DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
Important: The PCM detects engine movement by sensing the airflow through the mass air flow (MAF) sensor is more than 3 g/s, or by sensing CMP sensor pulses.
* The PCM detects a number other than 0 or 36 medium resolution engine speed signals for every 2 engine revolutions while receiving 6 low engine speed signals and 1 camshaft position signal.
* The above conditions are met for more than 8 seconds.
Action Taken When the DTC Sets
DTC P0336 is a Type B DTCs.
Conditions for Clearing the MIL/DTC
DTC P0336 is a Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition (EI) System Description (Electronic Ignition (EI) System Description)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
1. With the ignition OFF, inspect the engine wiring harnesses carrying the CKP sensor circuits for the following conditions:
* Close routing of secondary ignition wires
* Close routing of aftermarket electrical equipment
* Close to solenoids, motors, and relays
• Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.
2. Monitor the CKP Sensor A and the CKP Sensor B parameters. The parameters should increment from 0 to 255 continuously with the engine running or cranking.
3. 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. Test for less than 1 ohm of resistance on the medium resolution engine speed signal circuit.
• If greater than the specified value, test the medium resolution engine speed signal circuit for an open/high resistance.
2. Ignition OFF, inspect the CKP sensor for looseness and correct installation.
• If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.
3. Inspect the engine for the following conditions:
* Engine oil for debris and contamination
* Crankshaft reluctor wheel for damage
* The timing chain, tensioner, and sprockets for wear or damage
• If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.
4. If the medium resolution engine speed signal circuit, CKP sensor and engine timing components test normal, replace the IC module.
Component Test
1. Inspect the CKP sensor for looseness and correct installation.
2. Connect jumper wires from the CKP sensor connector 12-volt reference and the low reference to the CKP sensor. Turn ON the ignition, with the engine OFF.
3. Connect a DMM to the CKP Sensor signal at the CKP sensor and observe the Duty cycle. pass a steel object by the sensor repeatedly. The Duty cycle should increment.
• If the duty cycle does not increment, replace the CKP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Control Module References (Programming and Relearning) for IC module, and PCM replacement, setup, and programming
* Crankshaft Position Sensor Replacement (Service and Repair)