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Soundstream ,
changing E8 or E7 pump makes no different as the ECU for S-AYC is not same as AYC.
amsrsm,
you're right the ecu ctrl the ayc.
Jun ek9,
thats what most of the s'porean do. Or they drive the RS version.

You can try Ralliart ECU for AYC. but firstly would advise to go for checkup for confirmation on the problem. i hv two friends with E7 one confirm pump koyak. Another escape with changing the oil 2x.

As for the oil level, here's some explanation:How it works

On starting the car the AYC ECU checks the state of the system and operates the Electric Pump to charge the Accumulator. The Hydraulic Switch informs the AYC ECU when the correct operating pressure is reached and the Electric Pump is switched off. This cycle is continously maintained all the while the car is running with the pump running intermittently to keep the pressure correct.
When torque transfer is called for by the AYC ECU due to the sensed inputs and the AYC programming a signal is output to the Proportioning Valve and the Direction Control Valve to send the correct pressure to the correct Clutch Pack in the Torque Transferring

<blockquote data-quote="lanevo6" data-source="post: 1503767" data-attributes="member: 5413">Soundstream ,changing E8 or E7 pump makes no different as the ECU for S-AYC is not same as AYC.amsrsm,you&#039;re right the ecu ctrl the ayc. Jun ek9,thats what most of the s&#039;porean do. Or they drive the RS version.You can try Ralliart ECU for AYC. but firstly would advise to go for checkup for confirmation on the problem. i hv two friends with E7 one confirm pump koyak. Another escape with changing the oil 2x.As for the oil level, here&#039;s some explanation:How it works On starting the car the AYC ECU checks the state of the system and operates the Electric Pump to charge the Accumulator. The Hydraulic Switch informs the AYC ECU when the correct operating pressure is reached and the Electric Pump is switched off. This cycle is continously maintained all the while the car is running with the pump running intermittently to keep the pressure correct. When torque transfer is called for by the AYC ECU due to the sensed inputs and the AYC programming a signal is output to the Proportioning Valve and the Direction Control Valve to send the correct pressure to the correct Clutch Pack in the Torque Transferring</blockquote>

[QUOTE="lanevo6, post: 1503767, member: 5413"] Soundstream , changing E8 or E7 pump makes no different as the ECU for S-AYC is not same as AYC. amsrsm, you're right the ecu ctrl the ayc. Jun ek9, thats what most of the s'porean do. Or they drive the RS version. You can try Ralliart ECU for AYC. but firstly would advise to go for checkup for confirmation on the problem. i hv two friends with E7 one confirm pump koyak. Another escape with changing the oil 2x. As for the oil level, here's some explanation:How it works On starting the car the AYC ECU checks the state of the system and operates the Electric Pump to charge the Accumulator. The Hydraulic Switch informs the AYC ECU when the correct operating pressure is reached and the Electric Pump is switched off. This cycle is continously maintained all the while the car is running with the pump running intermittently to keep the pressure correct. When torque transfer is called for by the AYC ECU due to the sensed inputs and the AYC programming a signal is output to the Proportioning Valve and the Direction Control Valve to send the correct pressure to the correct Clutch Pack in the Torque Transferring [/QUOTE]

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