DESCRIPTION If recirculation/fresh mode changes unintentionally and without permission, the following causes are possible.
PROCEDURE
(a) Using the Techstream, check that the customize setting Air Inlet Mode is not set to "Automatic". Air Conditioner
OK: Air Inlet Mode is not set to "Automatic".
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Data List. (e) Read the Data List according to the display on the Techstream. Body Electrical > Air Conditioner > Data List
OK: The value of the display does not change frequently.
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Powertrain / Engine / Data List. (e) Read the Data List according to the display on the Techstream. Powertrain > Engine > Data List
OK: The value of the display does not change frequently.
(a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Air Conditioner / Data List. (e) Read the Data List according to the display on the Techstream. Body Electrical > Air Conditioner > Data List
(f) Install a manifold gauge set. (g) Read the manifold gauge pressure when the following conditions are met. (1) Prepare the vehicle according to the table below. Measurement Condition:
Standard Pressure: Low pressure side 150 to 250 kPa (1.5 to 2.5 kgf/cm2, 22 to 36 psi) High pressure side 1370 to 1570 kPa (14 to 16 kgf/cm2, 199 to 228 psi) (h) Compare the values displayed in the Data List and on the manifold gauge. OK: The values displayed in the Data List and on the manifold gauge match.
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Hybrid Control System: Hybrid/EV Battery Voltage System Isolation Internal Electronic Failure (P0AA649,P1C7C49-P1C7F49)
DESCRIPTION The hybrid vehicle control ECU monitors the battery voltage sensor and detects insulation malfunctions in the high-voltage system. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P0AA649 Hybrid/EV Battery Voltage System Isolation Internal Electronic Failu ...