P0016

DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 1 SENSOR A)

CIRCUIT DESCRIPTION

DTC Detection Conditions:

The Crankshaft Position (CKP) sensor system consists of a CKP sensor plate and a pickup coil. The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and a magnet. The sensor plate rotates and, as each tooth passes through the pickup coil, a pulse signal is created. The pickup 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.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

The ECM 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 timings is 5 CA (Crankshaft Angle) or less, the ECM stores it.

If the learned value meets both of the following conditions, the ECM interprets this as a defect in the VVT system and set a DTC.

a. "VVT learning" value is less than 24 CA, or more than 46 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.

Wiring Diagram:

Step 1:

INSPECTION PROCEDURE

HINT: Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. 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.

After replacing the ECM or adjusting intake valve timing, confirm that the DTC output does not recur.
a. Connect a hand-held tester or OBD II scan tool to the DLC3.
b. Turn the ignition switch to ON.
c. Turn the tester or scan tool ON.
d. Clear DTCs.
e. If using a hand-held tester, switch the ECM from normal mode to check mode.
f. Start the engine and warm it up.
g. Allow the engine to idle for 1 minute or more, and then drive the vehicle for 1 minute or more.
h. If using an OBD II scan tool, turn the ignition switch to OFF, and then repeat steps (f) and (g) above.
i. Confirm that no DTC is set, using the tester or scan tool.