DESCRIPTION If the airflow from the front registers is weak regardless of the blower speed setting displayed on the air conditioning control panel (radio and display receiver assembly), the following factors may be the cause.
PROCEDURE
(a) Operate the blower switch with the following conditions met and check that the airflow volume changes.
OK: Airflow volume increases.
(a) Check if the ECO mode indicator is off. OK: The ECO mode indicator is off.
(a) Operate the ECO switch assembly (electric parking brake switch assembly) and check that the ECO mode indicator turns off and the blower speed reduction is canceled. HINT:
(a) Visually check the clean air filter. Click here OK: The clean air filter is not dirty or clogged.
(a) Check the installation condition of the No. 1 cooler thermistor. OK: The No. 1 cooler thermistor is installed correctly.
(a) Check the installation condition of the aspirator. OK: The aspirator is installed correctly.
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Toyota Avalon Service & Repair Manual > Telematics System(for Gasoline Model): Lost Communication with Body Control Module "B" (U0142,U0155,U0163)
DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. HINT: If CAN communication system DTCs are stored, they may also be stored for other systems. DTC No. Detection Item DTC Detection Condition Trouble Area U0142 Lost Communication with Body Control Module "B ...