Toyota Sienna Service Manual: Lock Switch Circuit
DESCRIPTION
Each of the left and right seats has lock switches that detect the lock condition of the seat legs to the floor when the seat is in the original or folded-down state. If any of the lock switches detect an unlock condition, the 3rd SEAT indicator on the combination meter will come on and the folding-down, return, and reclining operations will be disabled.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FOLD SEAT CONTROL ECU
- Remove the fold seat control ECU with connector still connected.
- Measure the voltage according to the value(s) in the table below.
Standard voltage LH side
RH side
2 CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - LOCK SWITCH)
- Disconnect the connectors from the fold seat control ECU.
- Disconnect the connector from the lock switch.
- Measure the resistance according to the value(s) in the table below.
Standard resistance LH side
RH side
3 CHECK HARNESS AND CONNECTOR (LOCK SWITCH - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance LH side
RH side
4 REPLACE LOCK SWITCH
HINT: Since the lock switch cannot be inspected while it is removed from the vehicle, replace the lock switch with a normal one and check that the condition returns to normal.
OK: Same problem does not occur.
REPLACE FOLD SEAT CONTROL ECU
Release Actuator Circuit
DESCRIPTION
The fold seat control ECU receives a switch operation signal from the fold
seat switch and activates the
release actuator. The release actuator releases the lock of the stowed seat
b ...
Rear Power Seat Switch Circuit
DESCRIPTION
When the power rear no. 2 seat switch is operated, a recline signal is sent
to the fold seat control ECU.
The ECU activates the reclining motor based on the signal from the power rea ...
Other materials:
Door control transmitter
INSPECTION
1. INSPECT DOOR CONTROL TRANSMITTER
Inspect operation of the transmitter.
Remove the battery (lithium battery) from the transmitter.
Install a new or normal battery (lithium battery).
When a new or normal battery is not available,
connect 2 new ...
Data list / active test
1. DATA LIST
HINT:
Using the intelligent tester to read the DATA LIST allows
the values or states of switches, sensor, actuators and
other items to be read without removing any parts. This
non-intrusive inspection can be very useful because
intermittent conditions or signals may be discovered
...
Occupant Classification System Malfunction
DTC B1150/23 Occupant Classification System Malfunction
DESCRIPTION
The occupant classification system circuit consists of the center airbag
sensor assembly and the occupant
classification ECU.
If the center airbag sensor assembly receives signals from the occupant
classification ECU, it d ...
