Pinout Values and Diagnostic Parameters

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: TERMINALS OF ECU

1. CHECK TIRE PRESSURE WARNING ECU

HINT
Inspect the connector from the back side.





(a) Disconnect the R2 ECU connector.

(b) Measure the voltage according to the value(s) in the table below.





(c) Connect the R2 ECU connector.

(d) Measure the voltage and resistance according to the value(s) in the table below.





(e) Using an oscilloscope, check waveform 1.









HINT
The wavelength becomes shorter as the vehicle speed increases.

(f) Using an oscilloscope, check waveform 2.









HINT
The wavelength becomes shorter as the engine speed increases.