Camshaft Position Control Interface (VANOS)

Description

The Camshaft Position Control Interface consists (for each bank) of 1 PWM output drive to control the inlet camshaft position, and 1 PWM input signal for camshaft position feedback.

There is one diagnostic check of the Camshaft Position Signal, a fault is detected if:-
1. If the signal does not change state (high to low or low to high voltage) every crankshaft revolution.

There are five diagnostic checks of the Variable Camshaft Timing, a fault is detected if:-
1. The enabling conditions are satisfied and the PWM output drive voltage is less than 3 volts.
2. The enabling conditions are satisfied and the PWM output drive voltage is lees than 5 Volts.
3. The enabling conditions are satisfied and the PWM output drive current is greater than 2.4 A.
4. The alignment with the crank angle is less than 160 degrees or greater than 185 degrees.
5. The time taken to change timing is greater than 4 - 10 seconds (dependant upon the Engine Coolant Temperature).