DTC Code | DTC Name |
---|---|
P0335 | Crankshaft Position Sensor "A" Circuit |
P0339 | Crankshaft Position Sensor "A" Circuit Intermittent |
DESCRIPTION
The crankshaft position sensor system consists of a crank angle sensor plate and a pickup coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of wound copper wire, an iron core and magnet. The crank angle sensor plate rotates and, as each tooth passes by the pickup coil, a pulse signal is created. The pickup coil generates 34 signals per crankshaft revolution. Based on these signals, the ECM calculates the crankshaft position and engine speed. Using these calculations, the fuel injection and ignition timing are controlled.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0335 | Crankshaft Position Sensor "A" Circuit | When either of the following conditions is met (1 trip detection logic):
|
|
Comes on | DTC stored |
P0339 | Crankshaft Position Sensor "A" Circuit Intermittent | All of the following conditions are met (1 trip detection logic): (a) The engine speed is 1000 rpm or higher. (b) No crankshaft position sensor signal for 0.05 seconds or more. (c) 3 seconds or more have elapsed since the starter signal switched from on to off. |
|
Does not come on | DTC stored |
*a | 5 V/DIV. |
*b | 20 ms./DIV. |
Reference: Inspection using an oscilloscope.
Tech Tips
Grounding failure of the shielded wire may cause noise in the waveforms.
ECM Terminal Name | Between NE+ and NE- |
Tester Range | 5 V/DIV., 20 ms./DIV. |
Condition | Idling |
MONITOR DESCRIPTION
If there is no signal from the crankshaft position sensor despite the crankshaft rotating, the ECM interprets this as a malfunction of the sensor.
MONITOR STRATEGY
Required Sensors/Components (Main) | Crankshaft position sensor |
Required Sensors/Components (Related) | Camshaft position sensor |
Frequency of Operation | Continuous |
COMPONENT OPERATING RANGE
Crankshaft position sensor |
|
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the GTS on.
Start the engine.
Idle the engine for 20 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the pending DTCs.
Tech Tips
If a pending DTC is output, the system is malfunctioning.
If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P0335 or P0339.
Check the DTC judgment result.
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
Tech Tips
If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.
WIRING DIAGRAM
*a | Shielded |
*b | Crankshaft Position Sensor |
CAUTION / NOTICE / HINT
Tech Tips
After performing the procedure for the crankshaft position sensor, if DTC P0335 is output again, check the following items related to the camshaft position sensor.
Installation condition of the camshaft position sensor
Installation condition of the camshaft
Connection of the camshaft position sensor connector
Tech Tips
If no problem is found by this diagnostic troubleshooting procedure, check for problems by referring to the engine mechanical section.
The engine speed can be checked by using the GTS. To perform the check, follow the procedures below:
Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Engine Speed.
The engine speed may be indicated as zero despite the engine running normally. This is caused by a lack of NE signals from the crankshaft position sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed if the crankshaft position sensor output voltage is insufficient.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
READ VALUE USING GTS (ENGINE SPEED)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Engine Speed.
Tester Display |
---|
Engine Speed |
Start the engine.
Read the values displayed on the GTS while the engine is running.
Standard |
---|
Correct values are displayed. |
Tech Tips
To check the engine speed change, display the graph on the GTS.
If the engine does not start, check the engine speed while cranking.
If the engine speed indicated on the GTS remains at zero (0), there may be an open or short in the crankshaft position sensor circuit.
Result | |||
---|---|---|---|
|
OK |
CHECK FOR INTERMITTENT PROBLEMS Click here |
NG |
INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)
Inspect the crankshaft position sensor.
Result | |||
---|---|---|---|
|
NG |
REPLACE CRANKSHAFT POSITION SENSOR Click here |
OK |
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
Disconnect the crankshaft position sensor connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
*1 | Clearance |
Check the crankshaft position sensor installation.
OK |
---|
Crankshaft position sensor is installed correctly. |
Result | |||
---|---|---|---|
|
NG |
SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here |
OK |
INSPECT NO. 2 CRANKSHAFT TIMING SPROCKET (TEETH OF SENSOR PLATE)
Check the teeth of the sensor plate.
OK |
---|
Sensor plate does not have any cracks or deformation. |
Result | |||
---|---|---|---|
|
OK |
REPLACE ECM Click here |
NG |
REPLACE NO. 2 CRANKSHAFT TIMING SPROCKET Click here |