P0016

DTC P0016 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

CIRCUIT DESCRIPTION

DTC Detection Condition:

The Crankshaft Position (CKP) sensor system consists of a crankshaft position signal plate and a pickup coil. The signal plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and magnet. The signal 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 intake valve timing using the Variable Valve Timing (VVT) system to control the intake camshaft. The VVT system includes the ECM, Oil Control Valve (OCV) and 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 valve timing of the VVT system by setting the intake camshaft to the maximum retarded angle when the engine speed is idling. The ECM closes the OCV to retard the cam. The ECM stores this value as "VVT learned value" (when the difference between the target and actual valve timings is 5° CA (Crankshaft Angle) or less, the ECM learns it).

If the VVT learning value matches the following conditions, the ECM determines the existence of a malfunction in the VVT system and set the DTC.
a. "VVT learning" value is outside the normal range (differs depending on the type of engines).
b. Above condition continues for more than 18 seconds.

This DTC shows that the 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 runs after the engine has idled for 5 minutes.

Wiring Diagram:

INSPECTION PROCEDURE

Step 1:

HINT: Read freeze frame data using the hand-held tester or the 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.