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The basic steps to follow to make VVT activation much more straightforward are highlighted here and should follow something like this:
Reprogram ECU
Start engine
Let engine idle for approx 45 seconds
Drive car (on dyno is fine) at light load for approx 45 seconds to at least 40km/h (unsure of actual speed required but this seems to work for us).
COAST DOWN TO A COMPLETE STOP
Let idle, VVT should wake up within a few seconds.
That works on our car with CALID ZA1JA01G 100% of the time. If you don't do the drive-stop cycle you could be there for a long time. Below is a screenshot showing that parameter and how the VVT turns on after the drive-stop cycle. If this doesn’t work to initiate the VVT on the car then some further understanding is required.
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Intake VVT target enable Min | target VVT angle needs to be below this to enable |
Exhaust VVT target enable Min | target VVT angle needs to be below this to enable |
Intake CAM Enable DTC check switch | Set to 0 to ignore DTC checks when check for cam activation |
Cam Learning Global OCV duty Manual Switch | Set value to 1 to disable check for Intake and exhaust Cam OCV learning flags |
Exh CAM Enable DTC check switch | Set to 0 to ignore DTC checks when check for cam activation |
Cam Learning Global Learning Manual Switch | Set value to 0 to disable check for Intake and exhaust Cam Global learning flags |
Cam learning conditions Ok timer | Timer value for conditions check |
Cam enable type 1 timer start | Count down to change timer mode for learning |
Cam learning counter 1 | time for learning to be attempted |
Cam learning counter 2 | time for learning to be attempted |
Cam Enable RPM Stop Threshold Low | Below this the RPM intake cam can enable |
Cam Enable RPM Start Threshold Low | Below this the RPM intake cam can enable |
Cam Enable RPM Start Threshold HI | Above this RPM the cam will not enable |
Cam Enable RPM Stop Threshold Hi | Below this RPM the cam can enable |
Cam Enable RPM Stop Threshold 3 | Below this RPM the cam can enable |
Cam Enable RPM Start Threshold 3 | Above this RPM the cam will not enable |
Cam Enable RPM Start Threshold 2 | Above this RPM the cam will not enable |
Cam Enable RPM Stop Threshold 2 | Below this RPM the cam can enable |
Intake Cam Enable VSP Start Threshold Hi 2 | Above this VSP the cam will not enable |
Intake Cam Enable VSP Stop Threshold Hi 2 | Below this VSP the cam can enable |
Cam Enable type 1 ECT threshold | Coolant temperature threshold for type 1 learning |
Cam Enable type 2 ECT threshold | Coolant temperature threshold for type 2 learning |
Cam Enable type VSP Threshold | Vehicle speed threshold to start mode 2 CAM learning |
Intake Cam Initial Angle learn Stop Error Hi | Upper Angle error limit threshold for Intake cam initial angle error for the learning timer to stop |
Intake Cam Initial Angle learn Stop Error Low | Lower Angle error limit threshold for Intake cam initial angle error for the learning timer to stop |
Intake Cam Initial Angle learn limits Low | Threshold below which CAM learning stops occurring |
Intake Cam Initial Angle learn Limits Hi | Threshold above which CAM learning stops occurring |
Intake Cam Initial Angle Error Limit Low | Lower Angle error limit threshold for intake cam initial angle error for the learning timer to start |
Intake Cam Initial Angle Error Limit Hi | Upper Angle error limit threshold for Intake cam initial angle error for the learning timer to start |
Exh Cam Initial Angle Learning Delta limit | Initial Angle delta (change rate) limit threshold for exhaust cam initial angle error for the learning timer to stop |
Exh Cam Enable VSP Start Threshold Hi 2 | Above this VSP the cam will not enable |
Exh Cam Enable VSP Stop Threshold Hi 2 | Below this VSP the cam can enable |
Cam Enable VSP Start Threshold | Below this vehicle speed the Exhuast cam can enable |
Cam Enable VSP Stop Threshold | Below this vehicle speed the Exhuast cam can enable |
Exh Cam Initial Angle learn Stop Error Low | Lower Angle error limit threshold for exhaust cam initial angle error for the learning timer to stop |
Exh Cam Initial Angle learn Stop Error Hi | Upper Angle error limit threshold for exhaust cam initial angle error for the learning timer to stop |
Exh Cam Initial Angle learn limits Low | Threshold below which CAM learning stops occurring |
Exh Cam Initial Angle learn Limits Hi | Threshold above which CAM learning stops occurring |
Exh Cam Initial Angle Error Limit Low | Lower Angle error limit threshold for exhaust cam initial angle error for the learning timer to start |
Exh Cam Initial Angle Error Limit Hi | Upper Angle error limit threshold for exhaust cam initial angle error for the learning timer to start |
Cam enable RPM offset value | value added to the current RPM used in a validity check to see that the RPM signal is Ok, this should not need adjusting |
Intake Cam Target Offset | Offset to cam angle targets |
Intake OCV Duty Base mode 5 | Base duty for OCV mode 5 |
CAM Enable AIT maximum Global | Global enable hi limit for activation |
Cam Enable RPM hi Threshold | Below this RPM the cams can enable |
Cam Enable RPM hi Threshold Hys | Hysteresis for RPM threhsold |
Intake Cam Initial Angle Learning Delta limit | Initial Angle delta (change rate) limit threshold for Intake cam initial angle error for the learning timer to stop |
Cam Enable Delta Threshold | If the CAM angle delta (change rate) is higher than this the Cams wont acctivate |
OCV Base Duty delta hi threshold | Global threshold at which it believes there is a high rate of OCV base duty change |
Intake OCV Duty Base Limit Hi (mode 1, 6) | Base duty High Limit for OCV mode 1 & 6 |
Intake OCV Duty Base Limit Low (mode 1, 6) | Base duty Low Limit for OCV mode 1 & 6 |
Intake OCV Duty Base mode 1, 2, 6, 8, 9 | Base duty for OCV mode 1, 6, 8 & 9 |
Intake OCV Duty Base mode 2 | Base duty for OCV mode 2 |
Intake OCV Duty Base mode 4 | Base duty for OCV mode 4 |
Intake OCV Duty Base mode Default 2 | Default (error mode) Base duty for OCV mode 2 |
Intake OCV Duty Base mode Default 1,3 | Default (error mode) Base duty for OCV mode 1 & 3 |
Intake OCV Duty Base Limit Hi | Global Base duty limit for OCV |
Intake OCV Duty Base Limit Low | Global Base duty Limit for OCV |
Intake OCV Duty Base Limit Hi (mode 5) | Base duty High limit for OCV mode 5 |
Intake OCV Duty Base Limit Low (mode 5) | Base duty Low limit for OCV mode 5 |
Exhaust OCV Duty Base mode 5 | Base duty for OCV mode 5 |
Exh OCV Duty Base smoothing factor | OCV duty base smoothing factor |
Exh OCV Duty Base Failsafe | Failsafe OCV duty |
Exhaust OCV Duty Base Hi Limit (mode 1, 6) | Base duty High Limit for OCV mode 1 & 6 |
Exhaust OCV Duty Base Low Limit (mode 1, 6) | Base duty Low Limit for OCV mode 1 & 6 |
Exhaust OCV Duty Base mode 1, 2, 6, 8, 9 | Base duty for OCV mode 1, 6, 8 & 9 |
Exhaust OCV Duty Base mode 2 | Base duty for OCV mode 2 |
Exhaust OCV Duty Base mode 4 | Base duty for OCV mode 4 |
Exhaust OCV Duty Base mode Default 1,3 | Default (error mode) Base duty for OCV mode 1 & 3 |
Exhaust OCV Duty Base mode Default 2 | Default (error mode) Base duty for OCV mode 2 |
Exhaust OCV Duty Base mode Default 1 | Default (error mode) Base duty for OCV mode 1 |
Exhaust OCV Duty Base Limit Hi | Global Base duty limit for OCV |
Exhaust OCV Duty Base Limit Low | Global Base duty Limit for OCV |
Exhaust OCV Duty Base Limit Hi (mode 5) | Base duty High limit for OCV mode 5 |
Exhaust OCV Duty Base Limit Low (mode 5) | Base duty Low limit for OCV mode 5 |
Exhaust OCV Duty Integral Correction Limit Low | Base duty for OCV mode 5 |
Exhaust OCV Duty Integral Correction Limit Hi | OCV duty base smoothing factor |
Exhaust OCV enable Timer | Timer for Exhaust OCV enable |
Cam Enable ECT threshold Global | Global can enable coolant temperature threshold |
Cam Enable Time 1 | believed to be the timer to exit mode 4 and go to mode 9 |
Cam Enable Time 2 | believed to be the timer to exit mode 4 and go to mode 9 |
Intake OCV Integral Corr B1 | Intake cam Integral correction base duty map |
Intake OCV Integral Corr B2 | Intake cam Integral correction base duty map |
Intake OCV Duty Multiplier | Intake cam base duty correction map |
OCV Duty OK timer | OCV error countdown timer |
Intake OCV timer Duty Limit Hi | High duty limit to trigger the OCV error state |
Intake OCV timer Duty Limit Low | Low duty limit to trigger the OCV error state |
Exhaust OCV timer Duty Limit Hi | High duty limit to trigger the OCV error state |
Exhaust OCV timer Duty Limit Low | Low duty limit to trigger the OCV error state |
Exhaust OCV Integral Corr Multiplier B1 | Intake cam Integral correction multiplier map |
Exhaust OCV Integral Corr Multiplier B2 | Intake cam Integral correction multiplier map |
Exhaust OCV Duty Multiplier | Exhaust cam base duty correction map |
Intake Cam Enable RPM Threshold | RPM threshold for Intake CAM OCV enable |
Intake OCV Integral Corr Adder | OCV Prop/integral Adder |
Intake OCV Correction Temp Mult B1 | OCV correction temperature Multiplier |
Intake OCV Correction Temp Mult B2 | OCV correction temperature Multiplier |
Intake OCV Duty Battery Voltage corr | OCV correction battery voltage Multiplier |
Exhaust Cam Enable RPM threshold | RPM threshold for Intake CAM OCV enable |
Exhaust OCV Integral Corr Adder | OCV Prop/integral Adder |
Exhaust OCV Correction Temp Mult B1 | OCV correction temperature Multiplier |
Exhaust OCV Correction Temp Mult B2 | OCV correction temperature Multiplier |
Exhaust OCV Duty Battery Voltage corr | OCV correction battery voltage Multiplier |
2017+ cars have a few new maps (likely with the introduction of the improved cam sensing structures) if difficulties are found switching on cam please contact support@ecutek.com and these new maps can be looked at.
New Cam related Logging parameters are listed here
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