Toyota Sienna Service Manual: Tire Pressure Warning Reset Switch Circuit
DESCRIPTION
The ECU enters the initialization mode and performs initialization automatically, when the tire pressure warning ECU receives the signal from the tire pressure warning reset switch. If the ECU receives the signal, the tire pressure warning light blinks 3 times (1 second on, 1 second off).
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION
(a) Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE (See page TW-25).
OK: Reset switch ON: Tire pressure warning light comes on.
Reset switch OFF: Tire pressure warning light blinks.
END
2 INSPECT TIRE PRESSURE WARNING RESET SWITCH
(a) Disconnect the tire pressure warning reset switch connector.
(b) Measure the resistance between terminals 1 and 2 of the tire pressure warning reset switch when the tire pressure warning switch is ON and OFF.
Standard resistance 
3 CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SW - TIRE PRESSURE WARNING ECU)
(a) Disconnect the tire pressure warning reset switch T4 connector and tire pressure warning ECU T15 connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE TIRE PRESSURE WARNING ECU (See page TW-87)
Vehicle Speed Signal Error (Test Mode DTC)
DTC C2191/91 Vehicle Speed Signal Error (Test Mode DTC)
DESCRIPTION
The tire pressure warning ECU receives a speed signal from the combination
meter. This DTC is stored
upon entering test mode, a ...
Tire Pressure Warning Light Circuit
DESCRIPTION
If the ECU detects trouble, the tire pressure warning light blinks (comes on
after blinking for 1 minute) and
tire pressure monitor is cancelled at the same time. At this time, the ECU ...
Other materials:
Driver Side Outer Mirror
DTC B1209 Driver Side Outer Mirror
DESCRIPTION
This DTC is detected when communication between the outer mirror control ECU
LH and multiplex
network gateway ECU stops for more than 10 seconds
DTC No.
DTC Detection Condition
Trouble Area
B1209
Driver sid ...
Installing the second seats
Installing the second outside seats
Align the marking on the seat side cover to the marking on the
rail cover and align the marking on the seat front/back cover to
the rail.
Tip-up seat
Ottoman seat
Lower the seat and engage the latches.
If you locked the seat lat ...
Enter test mode
HINT:
Operation of the tire pressure warning reset switch
can be checked in TEST MODE.
During TEST MODE, the system is not initialized by
pushing the tire pressure warning reset switch. The
circuit of the tire pressure warning reset switch can be
inspected during this mode.
(a) Make ...
