P0337
DTC P0335 Crankshaft Position Sensor "A" CircuitDTC P0337 Crankshaft Position Sensor "A" Circuit Low Input
DTC P0338 Crankshaft Position Sensor "A" Circuit High Input
DTC P0339 Crankshaft Position Sensor "A" Circuit Intermittent
DESCRIPTION
DTC Detection Condition:
The crankshaft position sensor system consists of a crank angle sensor plate and Magnetic Resistance Element (MRE) type sensor. The crank angle sensor plate has 34 teeth at 10° intervals (2 teeth are missing for detecting top dead center), and is installed to the rear end of the crankshaft. The crank position sensor outputs 34 rotation signals per engine revolution. The ECM uses the G2 signal to distinguish between the cylinders, and uses the NE signal to detect the crankshaft position and engine rpm.
Reference: Inspection using an oscilloscope.
HINT:
- The correct waveform is as shown.
- VV1+ and VV2+ stand for the VVT sensor (for intake side) signal, and NE+ stands for the CKP sensor signal.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions (Part 1):
Typical Enabling Conditions (Part 2):
Typical Malfunction Thresholds:
Component Operating Range:
If there is no signal from the crankshaft position sensor despite the engine revolving, the ECM interprets this as a malfunction of the sensor.
When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 4 seconds, the ECM sets a DTC.
Wiring Diagram:
Step 1:
Step 1(Continued)-2:
Step 3-5:
Step 5(Continued)-7:
Step 8:
INSPECTION PROCEDURE
HINT:
- If no problem is found by this diagnostic troubleshooting procedure, troubleshooting the engine mechanical system.
- Check the engine speed. The engine speed can be checked by using the intelligent tester or Techstream. To check, follow the operation below:
a. Connect the intelligent tester or Techstream to the DLC3.
b. Start the engine.
c. Turn the tester ON.
d. Enter the following menus:
1. Intelligent tester - Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ENGINE SPD.
2. Techstream - Select: Powertrain / Engine / Data List / All Data / Engine Speed.
The engine speed may be indicated as zero despite the engine revolving normally. This is caused by a lack of NE signals from the crankshaft position (CKP) sensor. Alternatively, the engine speed may be indicated as lower than the actual engine speed, if the CKP sensor output voltage is insufficient.
- Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.