Toyota Sienna Service Manual: 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 P the seat cannot be operated.
If the ignition switch is in ACC or IG the seat cannot be operated.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FOLD SEAT CONTROL ECU
- Remove the fold seat control ECU with connectors still connected.
- Turn the ignition switch ON.
- 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 - PARK/NEUTRAL POSITION SWITCH)
- Disconnect the connector from the park/neutral position 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
3 INSPECT PARK/NEUTRAL POSITION SWITCH
- Remove the park/neutral position switch.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
4 CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)
- Measure the voltage according to the value(s) in the table below.
Standard voltage
REPLACE FOLD SEAT CONTROL ECU
On-vehicle inspection
1. CHECK POWER REAR NO. 2 SEAT with STOWING FUNCTION
Check the basic functions.
Operate the fold seat switch and power rear
No.2 seat switch and check to make sure each
seat ...
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 ...
Other materials:
Brake System Malfunction
DTC P1578 Brake System Malfunction
DESCRIPTION
This DTC is output when the VSC system has a problem. Check the VSC system
when this DTC is
output
DTC No.
DTC Detection Condition
Trouble Area
P1578
The ECM receives a brake system error signal for 0.2
...
On-vehicle inspection
1. Inspect intake air surge tank assembly
(A) inspection procedure when applying voltage
between the terminals:
(1) Disconnect the connector from the intake air
control valve.
(2) Apply battery voltage between terminals 1 (-)
and 2 (+) of the intake air control valve. Check
that a click ...
Anti-glare function
Manual anti-glare inside rear view mirror
Reflected light from the headlights of vehicles behind can be reduced
by operating the lever.
Normal position
Anti-glare position
Auto anti-glare inside rear view mirror
Responding to the level of brightness of the headlights of veh ...
