PRE-RELEASE
DTC P0335 or P0336
| DTC P0335 or P0336 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC P0335
Crankshaft Position Sensor Circuit
DTC P0336
Crankshaft Position Sensor Performance
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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5 V Reference
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P0335, P0651
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P0335
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P0651
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-
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Crankshaft Position Sensor Signal
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P0335
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P0335
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P0335
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P0336
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Low Reference
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-
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P0335
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-
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-
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| Circuit/System Description |
The crankshaft position sensor circuits consist of an engine control module (ECM) supplied 5 V reference circuit, low reference circuit, and an output signal circuit. The crankshaft position sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 58-tooth reluctor wheel on the crankshaft. Each tooth on the reluctor wheel is spaced at 60-tooth spacing, with 2 missing teeth for the reference gap. The crankshaft position sensor produces an ON/OFF DC voltage of varying frequency, with 58 output pulses per crankshaft revolution. The frequency of the crankshaft position sensor output depends on the velocity of the crankshaft. 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 position relative to the crankshaft, to control camshaft phasing, and to detect misfires.
| Conditions for Running the DTC |
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DTC P0101, P0102, P0103, P0340, P0341, P0641 or P0651 is not set.
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The mass air flow (MAF) is greater than 3 grams per second.
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The engine is cranking or running.
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The DTC runs continuously when the above conditions are met.
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| Conditions for Setting the DTC |
| Note | ||
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The ECM detects engine movement by sensing the airflow through the mass air flow (MAF) sensor when it is more than 3 g/s, or by sensing camshaft position sensor pulses. |
P0335
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The ECM detects that the starter is commanded ON and the engine has been cranking for more than 4 s without a crankshaft position sensor pulse.
OR |
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The ECM detects that the engine has been running, but has not received a crankshaft position sensor pulse for 2 of 10 engine revolutions.
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P0336
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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.
OR |
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The ECM detects that the engine is running, but more than 20 resyncs occur within 25 s.
OR |
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The ECM detects that the engine has been running, but the crankshaft does not sync for 0.1 s.
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| Action Taken When the DTC Sets |
DTCs P0335 and P0336 are Type B DTCs.
| Conditions for Clearing the DTC |
DTCs P0335 and P0336 are Type B DTCs.
| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Ignition System Description
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Ignition ON, check the diagnostic trouble code (DTC) information with a scan tool. The DTC P0651 should not be set.
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| 2. |
If the DTC is set, refer to
DTC P0641, P0651, P0697, or P06A3 (ECM)
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| 3. |
Clear the DTC information with a scan tool. Attempt to start the engine. Use a scan tool to read the DTC Info. DTC P0335 or P0336 should not be set.
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| 4. |
Engine idling, observe the scan tool Crankshaft Position Resync Counter parameter. The parameter should always display zero. Move the related harnesses/connectors of the B26 crankshaft position sensor while observing the parameter. Verify the engine does not stumble or stall, and the parameter does not increment.
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| 5. |
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.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the B26 crankshaft position sensor.
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| 2. |
Ignition OFF, all vehicle systems OFF, it may take up to 2 minutes for all systems to power down, test for less than 5 Ω between the low reference circuit terminal 2 and ground.
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| 3. |
If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 4. |
Ignition ON, engine OFF, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground. |
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| 5. |
If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 6. |
If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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| 7. |
Ignition ON, engine OFF, test for 4.8-5.2 V between the signal circuit terminal 3 and ground.
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| 8. |
If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 9. |
If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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| 10. |
Ignition OFF, connect a 3 A fused jumper wire to signal circuit terminal 3.
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| 11. |
Ignition ON, briefly and repeatedly touch the negative battery terminal with the other end of the jumper wire Active counter for crankshaft position should increase.
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| 12. |
If the Crankshaft Position Active Counter increments, test or replace the B26 crankshaft position sensor.
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| 13. |
If the Crankshaft Position Active Counter does not increment, replace the K20 ECM.
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| 14. |
Ignition OFF, inspect the B26 crankshaft position sensor for correct installation. Remove the B26 crankshaft position sensor from the engine. Inspect the sensor and the O-ring for damage.
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| 15. |
If the sensor is loose, inspect the sensor and the O-ring for damage. Replace as necessary.
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| 16. |
Inspect the engine for the following conditions:
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Engine oil for debris
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Crankshaft reluctor wheel for damage
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Timing chain, tensioner, and sprockets for wear or damage
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| 17. |
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.
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| 18. |
If all circuits and components test normal, test or replace the B26 crankshaft position sensor.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Crankshaft Position Sensor Replacement
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Control Module References
for replacement, setup, and programming
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