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(b) Using an oscilloscope, check waveform 1. Compressor lock signal TERMINAL NO. (SYMBOLS) TOOL SETTING CONDITION J19-8 (LOCK) - J19-14 (GND) 200 mV/DIV., 10 ms./DIV. Engine is running Blower switch LO A/C switch ON (c) Using an oscilloscope, check waveform 2. Blower motor control signal TERMINAL NO. (SYMBOLS) TOOL SETTING CONDITION J19-23 (BLW) - J19-14 (GND) 1 V/DIV., 500 µsec./DIV. Ignition switch ON Blower switch LO HINT: When the blower level is increased, the duty ratio changes accordingly. (d) Using an oscilloscope, check waveform 3. CAN communication signal TERMINAL NO. (SYMBOLS) TOOL SETTING CONDITION J19-11 (CANH) - J19-14 (GND) 1 V/DIV., 10 µsec./DIV. Ignition switch ON HINT: The waveform varies depending on the CAN communication signal. (e) Using an oscilloscope, check waveform 4. CAN communication signal TERMINAL NO. (SYMBOLS) TOOL SETTING CONDITION J19-12 (CANL) - J19-14 (GND) 1 V/DIV., 10 µsec./DIV. Ignition switch ON HINT: The waveform varies depending on the CAN communication signal. AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic A... |