Toyota Sienna Service Manual: 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 PROCEDURE
1 INSPECT FOLD SEAT CONTROL ECU
- Remove the fold seat control ECU with connectors still connected.
- Measure the voltage according to the value(s) in the table below.
Standard voltage LH side
RH side
2 INSPECT BACK DOOR COURTESY SWITCH
- Disconnect the connector from the back door courtesy switch.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - BACK DOOR COURTESY SWITCH)
- Disconnect the connectors from the fold seat control ECU.
- Measure the resistance according to the value(s) in the table below.
Standard resistance LH side
RH side
4 CHECK HARNESS AND CONNECTOR (BACK DOOR COURTESY SWITCH - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE FOLD SEAT CONTROL ECU
Park / Neutral Position Switch Circuit
DESCRIPTION
The fold seat control ECU receives signals from the Park/Neutral position
switch and controls the seat
stowing and return operations. If the shift lever is in any position other than
...
Indicator Circuit
DESCRIPTION
This system has two indicator lights. One of the indicator lights is built
into the fold seat switch. This
indicator light receives power from the fold seat control ECU. It comes on or ...
Other materials:
Inspection
1. INSPECT BRAKE CYLINDER AND PISTON
(a) Check the brake cylinder bore and front disc brake
piston for rust or scoring.
2. INSPECT PAD LINING THICKNESS
(a) Using a ruler, measure the pad lining thickness.
Standard thickness:
12.0 mm (0.472 in.)
Minimum thickness:
1.0 mm (0.039 in.)
3. ...
Short in Rear Curtain Shield Squib LH Circuit
DTC B1635/87 Short in Rear Curtain Shield Squib LH Circuit
DESCRIPTION
The rear curtain shield squib LH circuit consists of the center airbag sensor
assembly and the curtain
shield airbag assembly LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1635/87 ...
Open in Rear Curtain Shield Squib LH Circuit
DTC B1636/88 Open in Rear Curtain Shield Squib LH Circuit
DESCRIPTION
The rear curtain shield squib LH circuit consists of the center airbag sensor
assembly and the curtain
shield airbag assembly LH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1636/88 ...
