DESCRIPTION The seat heater switch (radio and display receiver assembly) communicates with the air conditioning amplifier assembly via LIN communication. If the LIN communication system is malfunctioning, the air conditioning amplifier assembly will not operate even if the seat heater switch (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) Clear the DTCs. Click here Body Electrical > Air Conditioner > Clear DTCs
(a) Check for DTCs. Click here Body Electrical > Air Conditioner > Trouble CodesOK: DTC B14B5 is not output.
(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 seat heater switch (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 > Hv Relay Assembly: Installation
INSTALLATION PROCEDURE 1. INSTALL HV BATTERY JUNCTION BLOCK ASSEMBLY CAUTION: Be sure to wear insulated gloves and protective goggles. (a) Install the HV battery junction block assembly to the HV battery with the 4 nuts. Torque: 7.5 N·m {76 kgf·cm, 66 in·lbf} NOTICE: If the HV battery junction bl ...