Diagnostic Aids

Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.

If oscilloscope is available, camshaft position sensor operation may be checked by reading camshaft position sensor waveform pattern with engine idling. This may be done by monitoring the camshaft position sensor signal which may be referred to as the G2 signal. Camshaft position sensor waveform pattern may be checked by connecting oscilloscope between terminals No. 15 (Yellow wire) and No. 24 (Pink wire) at ECM electrical connector E5. This is the G2 and NE- terminals on ECM. ECM is located behind passenger's side kick panel, just below instrument panel. See Figure. For ECM electrical connector terminal identification, see Figure. Camshaft position sensor waveform pattern should be properly displayed. See Figure.