P0016
1NZ-FXE 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)
DESCRIPTION
The crankshaft position sensor (CKP) system consists of a crankshaft position sensor plate and a pick-up coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pick-up coil is made of an iron core and magnet. The sensor plate rotates and as each tooth passes through the pick-up coil, a pulse signal is created. The pick-up coil generates 34 signals per engine revolution. Based on these signals, the ECM calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and ignition timing are controlled.
Reference: Inspection using an oscilloscope.
HINT: The correct waveform is as shown.
MONITOR DESCRIPTION
The ECM optimizes the valve timing using the Variable Valve Timing (VVT) system to control the intake valve 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, applied to the OCV, regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake valve camshaft. The ECM calibrates the valve timing of the VVT system by setting the camshaft to the maximum retard angle when the engine speed is idling. The ECM closes the OCV to retard the cam. The ECM stores this valve as "VVT learned value" (when the difference between the target valve timing and the actual valve timing is 5 degrees or less, the ECM stores this in its memory).
If the learned value meets both of the following conditions ("a" and "b"), the ECM interprets this as a defect in the VVT system and sets a DTC.
(a) VVT learning value is less than 21°CA (CA: Crankshaft Angle), or more than 46°CA.
(b) Above condition continues for more than 18 seconds.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction Freeze Frame Data.
PROCEDURE
1. CHECK VALVE TIMING (CHECK FOR LOOSE AND A JUMPED TOOTH OF TIMING CHAIN)
OK:
The matchmarks of the crankshaft pulley and camshaft pulley align.
NG -- ADJUST VALVE TIMING (REPAIR OR REPLACE TIMING CHAIN)
OK -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG).
(c) Turn Techstream ON.
(d) Put the engine in inspection mode Service Precautions.
(e) Start the engine and warm it up.
(f) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).
(g) Using Techstream, operate the OCV and check the engine speed.
OK:
NOTE: Do not drive the vehicle without deactivating inspection mode, otherwise damaging the transaxle may result.
NG -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
3. CHECK DTC OUTPUT RECURS
(a) Clear the DTCs DTC Check / Clear.
(b) Start the HV main system and warm the engine up.
(c) Drive the vehicle with the shift position in B at vehicle speed of more than 44 mph (70 km/h) approximately for 10 minutes or more.
(d) Read output DTCs using Techstream.
OK:
No DTC output.
HINT: *: DTC P0016 is output when a foreign object in engine oil is caught in some part of the system.
These codes will stay registered even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
OK -- VVT SYSTEM OK
NG -- Continue to next step.
4. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the air cleaner inlet, bolt and oil control valve filter.
(b) Check for cloggings in the oil control valve filter.
OK:
The filter has not clogged.
(c) Reinstall the filter, bolt and air cleaner inlet.
NOTE: If necessary, clean the filter.
NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK:
OCV has no contamination and moves smoothly.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
6. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
NEXT -- Continue to next step.
7. CHECK IF DTC RECURS
(a) Clear the DTCs DTC Check / Clear.
(b) Start the HV system, and warm the engine up.
(c) Drive the vehicle with the shift position in B at vehicle speed of more than 70 km/h (44 mph) approximately for 10 minutes or more.
(d) Read output DTCs using Techstream.
OK:
No DTC output.
NG -- REPLACE ECM
OK -- END