Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Operation Check

OPERATION CHECK

CHECK CUSTOMIZE PARAMETERS

NOTICE:

Confirm that the customize setting Auto Operation Interference Avoidance Function is set to off before checking the operation of the front power seat.

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CHECK POWER SEAT FUNCTION

(a) Check the basic functions.

(1) Operate the power seat switches and check that the following seat functions operate properly:

• Slide function
• Reclining function
• Lifter function
• Front vertical function
• Lumbar support adjustment function

CHECK POWER SEAT MOTOR (SLIDE, FRONT VERTICAL, LIFTER AND RECLINING FUNCTIONS)

(a) Check the PTC operation inside the power seat motor.

NOTICE:

• The inspection should be performed with the seat installed to the vehicle.
• Perform the 4 steps below to check the full range of motion for each power seat function.

HINT:

The resistance of the PTC thermistor increases when a switch of the front power seat switch LH is held down even after the seat has been moved to the farthest possible position in one direction. If the resistance increases beyond a specified level, the current is shut off to prevent a short circuit.

(1) Choose a power seat function. Operate a switch of the front power seat switch LH and move the seat to the farthest possible position in one direction. Keep the seat in that position for approximately 60 seconds.

(2) Operate the switch of the front power seat switch LH again and continue to try to move the seat in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound stops).

Standard:

4 to 90 seconds

(3) After the current is shut off, release the switch of the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate a switch of the front power seat switch LH and move the seat in the opposite direction. Check that the motor operates.

CHECK FRONT LUMBAR SUPPORT MOTOR

(a) Check the PTC operation inside the front lumbar support motor (forward - back).

NOTICE:

The inspection should be performed with the seat installed to the vehicle.

(1) Operate the front power seat switch LH and move the lumbar support to either the foremost or rearmost position. Keep the seat in that position for approximately 60 seconds.

(2) Operate the front power seat switch LH again and continue to try to move the lumbar support in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound will stop).

Standard:

4 to 90 seconds

(3) After the current is shut off, release the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate the front power seat switch LH and move the lumbar support in the opposite direction. Check that the motor operates.

(b) Check the PTC operation inside the front lumbar support motor (up - down).

NOTICE:

The inspection should be performed with the seat installed to the vehicle.

(1) Operate the front power seat switch LH and move the lumbar support to either the uppermost or lowermost position. Keep the seat in that position for approximately 60 seconds.

(2) Operate the front power seat switch LH again and continue to try to move the lumbar support in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound will stop).

Standard:

4 to 90 seconds

(3) After the current is shut off, release the front power seat switch LH and wait for approximately 60 seconds.

(4) Operate the front power seat switch LH and move the lumbar support in the opposite direction. Check that the motor operates.

CHECK POWER SEAT POWER EASY ACCESS SYSTEM

HINT:

• When troubleshooting a function, first make sure that the function is set to the default setting.

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• The power seat power easy access system may not operate and move the seat rearward if the seat is near the rearmost position.

(a) Move the driver seat to the foremost position using the front power seat switch LH.

(b) Perform either of the following and check that the driver seat moves rearward:

• With the engine switch off and the shift lever in P, unfasten the driver seat seat belt.
• With the shift lever in P and the driver seat seat belt unfastened, turn the engine switch off.

(c) Perform either of the following and check that the driver seat moves forward:

• With the shift lever in P, fasten the driver seat seat belt.
• With the shift lever in P, turn the engine switch from off to on (IG).

CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

HINT:

• The SET, M1 and M2 seat memory switches are shown in the illustration.
• The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

  If a memorizing operation has failed, release all of the switches. The seat memory function will not operate unless the switches are released.

• The seat will not return to the memorized position if 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.

  If a restoring operation has failed, release all of the switches. The seat memory restoring function will not operate unless the switches are released.

(a) Turn the engine switch on (IG) and check that the P position indicator is illuminated.

(b) Move the seat to the foremost and uppermost positions using the front power seat switch LH.

(c) Check that a buzzer sounds for 0.5 seconds and the seat position is memorized when the M1 switch is pressed within 3 seconds of the SET switch being pressed or the M1 switch is pressed while the SET switch is being pressed.

(d) Move the seat out of the foremost and uppermost positions using the front power seat switch LH.

(e) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M2 switch is pressed within 3 seconds of the SET switch being pressed or the M2 switch is pressed while the SET switch is being pressed.

(f) Move the seat to the rearmost and lowermost positions using the front power seat switch LH.

(g) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the foremost and uppermost positions (memorized positions) when the M1 switch is pressed.

(h) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves out of the foremost and uppermost positions (memorized positions) when the M2 switch is pressed.

(i) Turn the engine switch off and open the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1 or M2 switch within 180 seconds after the engine switch is turned off.

(j) Turn the engine switch off and close the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1 or M2 switch within 60 seconds after the engine switch is turned off.

CHECK MEMORY CALL FUNCTION

(a) Automatic memory call function

HINT:

When the customize function "Seat Move Distance" is set to "Standard", the seat slides backward to a position 50 mm (1.97 in) from the memorized position.

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(1) Prepare 2 electrical key transmitter sub-assemblies and label them electrical key transmitter sub-assembly A and electrical key transmitter sub-assembly B.

NOTICE:

Prepare 2 electrical key transmitter sub-assemblies which have already been registered to the vehicle and can be used to lock and unlock the doors normally.

HINT:

• Refer to Registration for the electrical key transmitter sub-assembly registration procedure.

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• Use tags to identify each electrical key transmitter sub-assembly.

(2) Register a seat position to the seat memory switch (M1) and the electrical key transmitter sub-assembly A.

HINT:

Refer to Memory Call Registration.

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(3) While carrying the electrical key transmitter sub-assembly A, unlock the driver door using the entry unlock function or wireless unlock operation. Open the driver door and check that a buzzer sounds for 0.1 seconds and the driver seat moves to the memorized position.

(4) Register a seat position to the seat memory switch (M2) and the electrical key transmitter sub-assembly B.

HINT:

Refer to Memory Call Registration.

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(5) While carrying the electrical key transmitter sub-assembly B, unlock the driver door using the entry unlock function or wireless unlock operation. Open the driver door and check that a buzzer sounds for 0.1 seconds and the driver seat moves to the memorized position.

CHECK MEMORY CALL EMERGENCY STOP FUNCTION

(a) While a memory call function is operating, check that performing one of the following will stop the memory call operation: 1) press the SET switch, M1 switch or M2 switch or 2) press the front power seat switch.