Diagnostic Aids
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
After confirming DTC P1430, if Toyota hand-held tester is available, use hand-held tester to access CURRENT DATA to confirm vacuum sensor pressure. If vacuum sensor pressure is zero psi, HCLS circuit may be shorted. If vacuum sensor pressure is 18.85 psi (1.3 kg/cm2 ) or more, VC circuit may be open or shorted, HCLS circuit may be open or E2 circuit may be open. Using hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.