SYSTEM INDEX
PROBLEM SYMPTOMS TABLE
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53005500520045004f00480050001100030037004b00480003[numbers indicate the priority of the likely
possible cause of the problem. Check each part in order. Replace parts as necessary.
Fig. 136: Problem Symptoms Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
ADJUSTMENT
1.REMOVE REAR WHEEL
2.ADJUST PARKING BRAKE SHOE CLEARANCE (SEE OVERHAUL
)
3.INSTALL REAR WHEEL
Torque: 103 N.m (1,050 kgf.cm, 76 ft.lbf)
4.INSPECT PARKING BRAKE PEDAL TRAVEL
a. Strongly step on the parking brake pedal.
b. Release the parking brake.
c. Slowly depress the parking brake pedal all the way once more and count the number of notches.
Parking brake pedal travel: 6 to 8 notches at 300 N (31 kgf, 67.5 lbf)
5.ADJUST PARKING BRAKE PEDAL TRAVEL
a. Remove the instrument cluster finish panel end.
b. Remove the instrument cluster finish panel center lower.
c. Remove the instrument panel under cover sub-assy No.1.
d. Remove the coin box assy.
e. Remove the outer mirror switch assy.
f. Remove the instrument panel safety pad sub-assy No.1.
g. Remove the instrument panel under cover sub-assy No.2.
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION
3.SYSTEM OPERATION
The front power seat's adjustment and position memory are shown in the chart below.
SYSTEM OPERATION
For the memory function, first, memory switch operation is transferred from the driver door ECU to the
driver seat ECU via the multiplex communication line. Then, either the seat position is recorded in
memory or a previously recorded seat position is recalled.
HINT:
Use this procedure to troubleshoot the front power seat control system with memory function.
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030018001100030003[
1.VEHICLE BROUGHT TO WORKSHOP
2.CUSTOMER PROBLEM ANALYSIS CHECK AND PROBLEM SYMPTOM CHECK (SEE
CUSTOMER PROBLEM ANALYSIS CHECK
)
3.CHECK COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX
COMMUNICATION SYSTEM (BEAN)
seat headrest raises and lowers.
Seat position sensorIs built in each seat adjuster and sends seat position data to driver seat
ECU so that it can detect seat positions at all times.
Seat control switchBased on switches operated, seat adjuster signals are input into driver seat
ECU and seat is adjusted accordingly. Lumbar support adjustments are
also done.
Set switch Memory switchWhen set switch and memory switch are pressed simultaneously, SET, 1, 2
or 3 switch is input to driver door ECU and driver side's seat position is
recorded. Then, when memory switch is pressed, SET, 1, 2 or 3 switch is
input to driver door ECU and driver side's seat position changes according
to memory.
Seat Adjustment FunctionDriverFront Passenger
Fore-and-Aft SlidePower and memoryPower
RecliningPower and memoryPower
Cushion SlidePower and memory-
Front Vertical HeightPower and memoryPower
Rear VerticalPower and memoryPower
Dual Lumbar SupportPower-
Single Lumbar Support-Manual
Headrest Fore-and-AftManualManual
Headrest HeightPower and memoryPower
