DTC Code | DTC Name |
---|---|
P0335 | Crankshaft Position Sensor "A" Circuit |
P0337 | Crankshaft Position Sensor "A" Circuit Low Input |
P0338 | Crankshaft Position Sensor "A" Circuit High Input |
P0339 | Crankshaft Position Sensor "A" Circuit Intermittent |
DESCRIPTION
The crankshaft position sensor system consists of a No. 1 crankshaft position sensor plate and Magneto-Resistive Element (MRE) type sensor. The No. 1 crankshaft position sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed on the crankshaft. The crankshaft position sensor generates 34 signals per crankshaft revolution. The ECM uses the NE signal to detect the crankshaft position and engine speed.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
---|---|---|---|---|---|
P0335 | Crankshaft Position Sensor "A" Circuit | Either of the following conditions is met (1 trip detection logic):
* |
|
Comes on | DTC stored |
P0337 | Crankshaft Position Sensor "A" Circuit Low Input | Output voltage of crankshaft position sensor is below 0.3 V for 0.43 seconds (1 trip detection logic). * |
|
Comes on | DTC stored |
P0338 | Crankshaft Position Sensor "A" Circuit High Input | Output voltage of crankshaft position sensor is higher than 4.7 V for 0.43 seconds (1 trip detection logic). * |
|
Comes on | DTC stored |
P0339 | Crankshaft Position Sensor "A" Circuit Intermittent | Under conditions (a), (b) and (c), no crankshaft position sensor signal is sent to the ECM for 0.05 seconds or more (1 trip detection logic): (a) Engine speed is 1000 rpm or more. (b) Starter signal is off. (c) 3 seconds or more have elapsed since the starter signal switched from on to off. * |
|
- | DTC stored |
*: When the engine is stopped and started automatically due to stop and start system control, the crankshaft position sensor does not monitor during the automatic cranking.
*a | 2 V/DIV. |
*b | 20 ms./DIV. |
Reference: Inspection using an oscilloscope.
The correct waveform is as shown.
ECM Terminal Name | Between NE+ and NE- |
Tester Range | 2 V/DIV., 20 ms./DIV. |
Condition | Idling with warm engine |
MONITOR DESCRIPTION
If there is no signal from the crankshaft position sensor despite the crankshaft revolving, the ECM interprets this as a malfunction of the sensor.
When the sensor output voltage remains at below 0.3 V, or higher than 4.7 V, the ECM stores a DTC.
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, P0337, P0338 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 | Crankshaft Position Sensor |
CAUTION / NOTICE / HINT
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 / 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 |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF CRANKSHAFT POSITION SENSOR)
*a | Front view of wire harness connector (to Crankshaft Position Sensor) |
Disconnect the crankshaft position sensor connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM) 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)
*a | Clearance |
Check the crankshaft position sensor installation condition.
OK |
---|
Crankshaft position sensor is installed correctly. |
Result | |||
---|---|---|---|
|
NG |
SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here |
OK |
INSPECT NO. 1 CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE)
Inspect the teeth of the No. 1 crankshaft position sensor plate.
OK |
---|
No. 1 crankshaft position sensor plate does not have any cranks or deformation. |
Result | |||
---|---|---|---|
|
NG |
REPLACE NO. 1 CRANKSHAFT POSITION SENSOR PLATE Click here |
OK |
REPLACE CRANKSHAFT POSITION SENSOR
Replace the crankshaft position sensor Click here.
Result | ||
---|---|---|
|
NEXT |
CHECK WHETHER DTC OUTPUT RECURS (DTC P0335, P0337, P0338 AND/OR P0339)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine.
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Read the DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
END |
B |
REPLACE ECM Click here |
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 | |||
---|---|---|---|
|
OK |
REPLACE ECM Click here |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |