Toyota Sienna Service Manual: Reverse Signal Circuit
DESCRIPTION
The radio and navigation assembly receives a reverse signal from the park/neutral position switch and information about the GPS antenna, and then adjusts vehicle position.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT RADIO AND NAVIGATION ASSEMBLY
- Disconnect the radio and navigation assembly connector R12.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION - PARK / NEUTRAL POSITION SWITCH)
- Disconnect the radio and navigation assembly connector R12 and park/neutral position switch connector P1.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 INSPECT PARK / NEUTRAL POSITION SWITCH
- Disconnect the park/neutral position switch connector P1.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPAIR OR REPLACE HARNESS OR CONNECTOR
AVC-LAN Circuit
DESCRIPTION
Each unit of the navigation system connected to the AVC-LAN (communication
bus) transfers the signal of
each switch by communication.
When a short to +B or short to ground occurs in ...
Navigation Voice Circuit
DESCRIPTION
This circuit is used when the voice guidance in the navigation system is on.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (RADIO AND NAVIGATION ASSEMBLY - STER ...
Other materials:
Remote Up / Down Function does not Operate
DESCRIPTION
If the REMOTE UP/DOWN function does not operate, any of the following
troubles may be the cause:
There is an open or short circuit in the wiring between the power
window master switch and the
applicable power window regulator switch.
The power window master swit ...
Seat heaters
For driver’s seat
For front passenger’s seat
On
The indicator light comes on.
Adjusts the seat temperature
The further you move the dial
upward, the warmer the seat
becomes.
The seat heaters can be used when the engine switch is in the “ON”
position
(vehicles ...
Inspection
1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY
(a) Check the vacuum check valve.
(1) Slide the clip and disconnect the vacuum hose.
(2) Remove the vacuum check valve.
(3) Check that there is ventilation from the booster
to the engine, and no ventilation from the
engine to the booster.
...