Toyota Sienna Service Manual: Terminals of ECU
1. FOLD SEAT CONTROL ECU LH
- Disconnect the fold seat control ECU connectors.
- Measure the voltage and resistance of the wire harness side connectors.
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the fold seat control ECU connectors.
- Measure the voltage of the connectors.
If the result is not as specified, the fold seat control ECU may have a malfunction.
2. FOLD SEAT CONTROL ECU RH
- Disconnect the fold seat control ECU connectors.
- Measure the voltage and resistance of the wire harness side connectors.
If the result is not as specified, there may be a malfunction on the wire harness side.
- Reconnect the fold seat control ECU connectors.
- Measure the voltage of the connectors.
If the result is not as specified, the fold seat control ECU may have a malfunction.
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "Suspect Area"
co ...
Diagnosis system
1. CHECK DLC3
The vehicle uses ISO 15765-4 communication
protocol.
The terminal arrangement of the DLC3 complies
with SAE 1962 and matched the ISO 15765-4
format.
If the resul ...
Other materials:
Back Door Courtesy Switch Circuit
DESCRIPTION
The fold seat control ECU receives signals from the back door courtesy switch
and detects the state of the
back door (open/close). If the ECU does not detect that the back door is open,
the seat stowing and return
functions are not available.
WIRING DIAGRAM
INSPECTION PROCED ...
Programming the HomeLink® (for U.S.A. owners)
The HomeLink® compatible transceiver in your vehicle has 3 buttons
which can be programmed to operate 3 different devices. Refer to the
programming method below appropriate for the device.
Indicator light
Buttons
Programming the HomeLink®
Point the remote control for
the d ...
Canceling the rear moon roof operation (vehicles with the rear
moon roof)
Press the switch to disable the
rear moon roof operation from the
rear seat.
Pressing the switch again will
enable the operation again.
The moon roof can be operated when
The engine switch is in the “ON” position (vehicles without a smart key
system)
or IGNITION ON mode (vehicles ...
