P0016

2AZ-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

In the VVT (Variable Valve Timing) system, the appropriate intake valve opening and closing timing is controlled by the ECM (included in the hybrid vehicle control ECU). The ECM performs intake valve control by performing the following: 1) controlling the camshaft and camshaft timing oil control valve, and operating the camshaft timing gear; and 2) changing the relative positions of the camshaft and crankshaft.






MONITOR DESCRIPTION

The ECM (included in the hybrid vehicle 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 that the VVT system is malfunctioning, and sets the DTC.

- VVT learning value: Less than 25°CA, or more than 51°CA.
- Above condition continues for 18 seconds or more.

This DTC indicates that the angle between the intake camshaft and the crankshaft is incorrect due to 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 the hybrid vehicle 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 VALVE TIMING (CHECK FOR LOOSE AND JUMPED TOOTH OF TIMING CHAIN) P0011
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
3. INSPECT OIL CONTROL VALVE FILTER
NG -- CLEAN OIL CONTROL VALVE FILTER
OK -- Continue to next step.
4. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
NEXT -- Continue to next step.
5. CHECK WHETHER DTC OUTPUT RECURS
NOTICE: After replacing the hybrid vehicle control ECU or adjusting intake valve timing, confirm that the DTC output does not recur.
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the tester on.
(d) Clear DTCs DTC Check / Clear.
(e) Switch the hybrid vehicle control ECU from normal mode to check mode using the tester Check Mode Procedure.
(f) Put the engine in inspection mode Component Tests and General Diagnostics.
(g) Warm up the engine.
(h) Allow the engine to idle for 1 minute or more, and then drive the vehicle for 1 minute or more.
(i) Confirm that no DTC is set, using the tester.
OK:
No DTC output
NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- SYSTEM IS OK