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This car has two throttle on the engine, left bank that is driver side and right bank that is the passenger side, this car came from another shop with throttle issue, first shop had pcm replaced because of this issue...
When i got access to the car, i noticed that there is throttle power issue, and with further checked i found out that, the earth or ground which come from the pcm, that control the throttle relay in the ipdm, always get lost when car start . and when it happened this way, then throttle power fault code will come on the scan tool, i have tried to understand what exactly is cutting this earth from controlling the throttle relay but i cant find it.. there is no short to power to that wire neither there is also short to ground..
Whenever the problem happened and you check the pcm power feeds, and earth feeds all re okay, except the powers that feed back to the pcm from the throttle relay, this powers wont be there. now when you ground the throttle relay earth manually, and get the powers restore, so far as it is not the pcm which supplied this earth, the throttle wont work, i need help if someone has come across this issue before. thanks this is twin throttle engine type
Problem solved, it was open circuit from the throttle input power side of the pcm, other shop has used something big to open the pins therefore not having contact to the pcm side
