OPERATION CHECK CHECK FRONT SEAT HEATER (a) Turn the engine switch on (IG). (b) Turn the seat heater switch (radio and display receiver assembly) on and check that the indicator illuminates and the surface of the front seat warms up. (c) Check that the front seat surface temperature changes according to the operation of the seat heater switch (radio and display receiver assembly) as follows: HI → MID → LO. CHECK REAR SEAT HEATER (w/ Rear Seat Heater) (a) Turn the engine switch on (IG). (b) Turn the seat heater switch on and check that the indicator illuminates and the surface of the rear seat warms up. CHECK THERMOSTAT OF SEAT HEATER ASSEMBLY (REAR SEAT CUSHION HEATER LH) (w/ Rear Seat Heater) (a) Remove the seat heater assembly (rear seat cushion heater LH). Click here
(b) Remove the seat heater assembly (rear seatback heater LH). Click here (c) Connect the B seat heater assembly (rear seatback heater LH) connector and A seat heater assembly (rear seat cushion heater LH) connector. 
(d) Apply battery voltage and check the operation of the rear seat heater as shown in the table below. NOTICE: To prevent the rear seat heater from overheating, be sure to disconnect the battery from the rear seat heater immediately after this inspection is completed. OK:
CHECK THERMOSTAT OF SEAT HEATER ASSEMBLY (REAR SEAT CUSHION HEATER RH) (w/ Rear Seat Heater) (a) Remove the seat heater assembly (rear seat cushion heater RH). Click here
(b) Remove the seat heater assembly (rear seatback heater RH). Click here (c) Connect the C seat heater assembly (rear seat cushion heater RH) connector and D seat heater assembly (rear seatback heater RH) connector. 
(d) Apply battery voltage and check the operation of the rear seat heater as shown in the table below. NOTICE: To prevent the rear seat heater from overheating, be sure to disconnect the battery from the rear seat heater immediately after this inspection is completed. OK:
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Fuel Rail / System Pressure - Too High (P008800)
DESCRIPTION Refer to DTC P008700. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P008800 Fuel Rail / System Pressure - Too High Although the ECM is requesting the fuel pump assembly (for high pressure side) to open the spill control valve, fuel pressure increa ...
