P0016
3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0016: Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
DTC P0016 - Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)
DTC P0018 - Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
DESCRIPTION
The crankshaft position sensor (NE signal) consists of a magnet, iron core and pickup coil.
The NE signal plate (crankshaft position sensor plate) has 34 teeth and is installed on the crankshaft. The NE signal sensor generates 34 signals for each engine revolution. This sensor monitors a plate (timing rotor) located on the crankshaft timing pulley and is used by the ECM (Included in HV control ECU) to detect crankshaft angle and engine speed (RPM/NE). As the crankshaft timing pulley rotates through an engine revolution, this sensor communicates the rotation of the NE signal plate as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time and ignition timing.
MONITOR DESCRIPTION
- The ECM (Included in HV control ECU) optimizes the valve timing by using the VVT (Variable Valve Timing) system to control the intake camshaft. The VVT system includes the ECM, the Oil Control Valve (OCV) and the VVT controller.
- The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake camshaft. The ECM calibrates the intake valve timing by setting the intake camshaft to the most retarded angle while the engine is idling. The ECM closes the OCV to retard the cam. The ECM stores this value as the VVT learning value. When the difference between the target and actual intake valve timing is 5° CA (Crankshaft Angle) or less, the ECM stores it.
- If the VVT learning value matches the following conditions, the ECM determines the existence of a malfunction in the VVT system, and sets the DTC.
- VVT learning value: Less than 23° CA, or more than 45° CA.
- Above condition continues for 18 seconds or more.
- This DTC indicates that the intake camshaft has been installed toward the crankshaft at an incorrect angle, caused by factors such as the timing chain having jumped a tooth.
- This monitor begins to run after the engine has idled for 5 minutes.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. The ECM (Included in HV control ECU) 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
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016 OR P0018)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the tester ON.
(c) Enter the following menus: Powertrain / Engine and ECT / Trouble Code.
(d) Read the DTCs.
Result
HINT: If any DTCs other than P0016 or P0018 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART
A -- Continue to next step.
2. PERFORM ACTIVE TEST BY CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OPERATE OCV)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the tester ON.
(c) Put the engine in inspection mode.
(d) Warm up the engine.
(e) On the tester, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).
(f) Check the engine speed while operating the Oil Control Valve (OCV) using the tester.
OK
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING BELT)
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0016 OR P0018)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the tester ON.
(c) Clear the DTCs.
(d) Start the engine and warm it up.
(e) Switch the ECM (Included in HV control ECU) from normal mode to check mode using the tester.
(f) Drive the vehicle for more than 10 minutes.
(g) Read the DTCs using the tester.
OK:
No DTC output.
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING BELT)
OK -- END
4. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING BELT)
(a) Remove the cylinder head covers RH and LH.
(b) Turn the crankshaft pulley, and align its groove with timing mark "0" of the timing belt cover.
(c) Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the No. 3 timing belt cover as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), then align the marks as above.
OK:
The timing marks on the camshaft timing gears are aligned as shown in the illustration.
(d) Reinstall the cylinder head cover.
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)
(a) Remove the OCV.
(b) Measure the resistance between the terminals of the OCV.
Standard resistance:
6.9 to 7.9 Ohms at 20°C (68°F)
(c) Apply positive battery voltage to terminal 1 and the negative battery voltage to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the OCV.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the oil control valve filter.
OK:
The filter is not clogged.
NG -- CLEAN OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. REPAIR CAMSHAFT TIMING GEAR ASSEMBLY
NEXT -- Continue to next step.
8. READ VALUE OF TECHSTREAM (CHECK IF DTC OUTPUT RECURS)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position and turn the tester ON.
(c) Clear the DTCs.
(d) Start the engine and warm up.
(e) Switch the ECM (Included in HV control ECU) from normal mode to the check mode using the tester.
(f) Drive the vehicle for more than 10 minutes.
(g) Read the DTCs.
Standard:
No DTC output.
OK -- SYSTEM OK
NG -- REPLACE HV CONTROL ECU