Pinout Values and Diagnostic Parameters

AIR CONDITIONING SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU

1. Air conditioning amplifier





























*1: with LEXUS Navigation System
*2: without LEXUS Navigation System






(a) Waveform 1:










(b) Waveform 2:










(c) Waveform 3:





- The correct waveform is as shown.
- The waveform frequency "A" becomes longer as the engine coolant temperature becomes higher, as shown in the chart.





2. Accessory Meter Panel









*1: with LEXUS Navigation System
*2: without LEXUS Navigation System
3. Heater Control Switch (with LEXUS Navigation System)













4. ECM









5. Rear Cooler Control Panel