User Defined VVT Mode

 

The User Defined VVT Cam Control Mode is for use when there is no pre-defined VVT mode available, it enables a custom VVT setup to be calibrated. This is a complex task that involves custom PID tuning of the VVT system.

 

The following are the requirements for User Defined mode:

·Only works with VVT systems which use one solenoid per cam.

·Experience with PID Tuning.

 

WARNING

 

The setup of the User Defined VVT mode is a complex process, and if not setup correctly, could lead to serious engine damage. Be sure to completely read the VVT help section and understand the whole topic before attempting the process. If unsure about something, stop and seek help from your closest Link dealer.

 

 

Configuring User Defined VVT Mode

 

Below is the general process for configuring the User Defined VVT Cam Control Mode. Each setup will vary because of the number of variable cams, the number of teeth on the cams wheel, and the degrees between the teeth.

 

1.Go to ECU Settings > VVT Control > VVT Setup and set the Cam Control Mode to 'User Defined'.

2.Set the Number of Banks that the engine has and set the Available Variable Cams on each bank.

3.Wire-up each cam's position sensor and set the Cam Sensor Input for each cam.

4.Wire-up each cam's control solenoid and set the PWM Output and PWM Frequency for each cam.

5.Setup the RPM Lockout and ECT Lockout.

6.Select the VVT Inlet Target Table and set the whole table to a value of zero. Do the same for the VVT Exhaust Target Table.

7.If you want to adjust the zero position of the cams do it now using the Inlet Fully Retard Position and Exhaust Fully Advance Position settings.

8.Set the Tooth Tolerance Range settings to control the endpoints of the cam rotation.

9.Use the Cam Angle Calibration Function to automatically set the Tooth Counts and Tooth Offset Values.

10. Fill in the VVT Target Tables and adjust the Base Duty Cycle and PID settings until the cams operate as desired.

 

Refer to VVT Settings for more information on the operation of each setting and VVT Runtimes for more information on the various Runtime Values and Statuses.