Track a commanded intake-cam change from the ECM to oil-control solenoid, cam phaser, and CKP/CMP feedback. Find out why a cam-angle fault code is not a parts order.
Distinguish requested cam angle from actual cam position, compare a position fault with a base-timing offset, and pick a test that separates oil-supply, electrical, mechanical, and sensor faults.
Training model, not an OEM specification. This is a simplified, oil-operated, intake-cam phaser on a four-stroke engine. All angle values are illustrative crankshaft degrees (°CA); engine design, direction of advance, target strategy, expected oil pressure, waveform shape, and diagnostic thresholds vary by vehicle. Work on a running engine only with proper safety procedures and service information.
The request is inhibited only in the modeled cold-start mode. This exercise does not model every manufacturer’s temperature, RPM, load, or fail-safe conditions.
Select a condition and a test.
In this simplified system, the solenoid meters engine oil into a phaser; it does not mechanically pull the camshaft into position.
Diagram shows one symbolic edge in a 720° cycle, not a real tooth-count pattern or OEM oscilloscope trace. A change in CMP position relative to CKP can reflect normal commanded cam phasing. Check the operating command and known-good pattern before calling correlation incorrect.
Choose an answer.