| Circuit Diagram |




Singal Waveform [Sensor 1, 2] [Bank 1 / Sensor 1] [Bank 1 / Sensor 2]
Inspection Wave form 1. Check signal waveform of HO2S using a diagnostic tool. Specification : Refer to "Waveform" Heater Resistance 1.
Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed.