Meter / Gauge System

METER: METER / GAUGE SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU

1. COMBINATION METER ASSEMBLY

























*1: for U. S. A.
*2: for Canada





(a) Waveform 1 (Reference): Using an oscilloscope:





HINT: As vehicle speed increases, the cycle of the signal waveform narrows.





(b) Waveform 2 (Reference): Using an oscilloscope:










(c) Waveform 3 (Reference): Using an oscilloscope:





HINT: As the engine coolant temperature rises, the period "A" shown in the illustration becomes longer.









(d) Waveform 4 (Reference): Using an oscilloscope:






2. ACCESSORY METER









*1: with LEXUS Navigation System
*2: without LEXUS Navigation System
3. ECM













(a) Waveform 1 (Reference): Using an oscilloscope:










(b) Waveform 2 (Reference): Using an oscilloscope:





HINT: As the engine coolant temperature rises, the period "A" shown in the illustration becomes longer.





4. COMBINATION METER INNER CIRCUIT





















*1: with Lexus Navigation System
*2: without Lexus Navigation System
*3: for U. S. A. only