Toyota Sienna Service Manual: Driving Position Memory Switch Circuit (w/ Memory)
DESCRIPTION
The seat memory switch sends signals to the outer mirror control ECU LH via the multiplex communication system to memorize a given seat position. This memory system does not use a position sensor. The seat position is detected by counting pulses that are output when the motor turns. If there is no pulse output from the motor, the motor will stop operating. The seat memory switch is later used to send signals to the front power seat switch to return the seat to one of the memorized positions.
The power seat memory operation can be performed only when the ignition switch is on and the shift lever is in the P position.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 READ VALUE OF INTELLIGENT TESTER
- Connect the intelligent tester (with CAN VIM) to the DLC3.
- Turn the ignition switch on.
- Read the DATA LIST.
D_SEAT (Position control ECU and switch assembly)
OK: Condition status can be displayed.
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2 INSPECT SEAT MEMORY SWITCH (DRIVING POSITION MEMORY SWITCH)
- Remove the seat memory switch.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT)
- Measure the voltage according to the value(s) in the table below.
Standard voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4 CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU LH - SEAT MEMORY SWITCH)
- Disconnect outer mirror control ECU LH connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE OUTER MIRROR CONTROL ECU LH
Power Seat Motor Circuit
DESCRIPTION
When the power seat control switch is operated, a command signal is sent to
the position control ECU
and switch assembly (power seat control switch and ECU). The front power seat
swi ...
ECU Power Source Circuit
DESCRIPTION
The position control ECU and switch assembly (power seat control switch and
ECU) is contained in the
switch assembly.
During manual operation, only one switch signal is accepted. If ...
Other materials:
Vehicle Speed Signal Circuit between Stereo Component Amplifier and
Combination Meter
DESCRIPTION
This circuit is necessary for the ASL (Auto Sound Leveliser) built into the
stereo component amplifier.
Speed signals are received from the combination meter and used for the ASL.
The ASL function automatically adjusts the sound data in order to enable hearing
the clear audio ...
Low pitched horn
COMPONENTS
REMOVAL
1. REMOVE FRONT BUMPER COVER
ET-3
2. REMOVE LOW PITCHED HORN
Disconnect the connector.
Remove the bolt and horn.
INSPECTION
1. INSPECT LOW PITCHED HORN
Apply battery voltage and check operation of the
horn, as shown in the table.
Stan ...
Calculation formula for your vehicle
Cargo capacity
Total load capacity (vehicle capacity weight)
When 2 people with the combined weight of A lb. (kg) are riding in
your vehicle, which has a total load capacity (vehicle capacity weight)
of B lb. (kg), the available amount of cargo and luggage load capacity
will be C lb. ...
