| [ http://www.jimwolftechnology.com/wolfpdf/Z32HIGH_BOOST_SWITCH.PDF ] i had a TT with code 55 but ECU would not send out ground signal to saftey boost solenoid that are activated by a ground signal from the ECU as they have a constant batt voltage with IGN on from IGN fuse. In sort clip and ground the wire at the ECU area on the harness side, not ECU side. The vacuum and electrical circuit is designed with a logic that if there is an open, it will fail safe into saftey boost.
Formerly SpecNATT (Houston)
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