DESCRIPTION The air conditioning control panel (radio and display receiver assembly) communicates with the air conditioning amplifier assembly via LIN communication. If a malfunction occurs in the LIN communication system, the air conditioning amplifier assembly will not operate, even if the air conditioning control panel (radio and display receiver assembly) is operated.
WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure. PROCEDURE
(a) Disconnect the G20 air conditioning control panel (radio and display receiver assembly) connector. (b) Measure the voltage and resistance according to the value(s) in the table below. Standard Voltage:
Standard Resistance:
(a) Disconnect the G35 air conditioning amplifier assembly connector. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
(a) Connect the G35 air conditioning amplifier assembly connector. (b) Turn the engine switch on (IG). (c) Using an oscilloscope, check the waveform.
OK: Waveform is similar to that shown in the illustration.
(a) Connect the G20 air conditioning control panel (radio and display receiver assembly) connector. (b) Turn the engine switch on (IG). (c) Using an oscilloscope, check the waveform.
OK: Waveform is similar to that shown in the illustration.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Rough Idling
DESCRIPTION Problem Symptom Suspected Area Trouble Area Engine speed fluctuation due to abnormal combustion Idle speed too low or high Strong engine vibration due to above symptoms Ignition malfunction Deviation in air fuel ratio (Excessive or insufficient intake air volume or fuel supply) Insuffici ...