Pinout Values and Diagnostic Parameters

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

HINT
Inspect the connectors from the back side.

1. CHECK TIRE PRESSURE WARNING ECU





(a) Disconnect the D89 ECU connector.

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





(c) Connect the D89 ECU connector.

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





(e) Using an oscilloscope, check the waveform 1.









HINT
The wavelength becomes shorter as the vehicle speed increases.

(f) Using an oscilloscope, check the waveform 2.









HINT
The wavelength becomes shorter as the engine speed increases.