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:
Low pitched horn
COMPONENTS
REMOVAL
1. REMOVE FRONT BUMPER COVER
ET-3
2. REMOVE LOW PITCHED HORN
Disconnect the connector.
Remove the bolt and horn.
INSPECTION
1. INSPECT LOW PITCHED HORN
Apply battery voltage and check operation of the
horn, as shown in the table.
Stan ...
Removal
1. Remove front wheel
2. Remove front wiper arm head cap
Hint:
(see page ww-3)
3. Remove fr wiper arm rh
HINT:
(See page WW-3)
4. Remove fr wiper arm lh
HINT:
(See page WW-3)
5. Remove cowl top ventilator louver subassembly
Hint:
(see page ww-3)
6. Remove windshield wiper motor & li ...
Map Display Incomplete
INSPECTION PROCEDURE
1 CHECK MAP DISC
Check that the map disc is not deformed or cracked.
OK:
No deformations or cracks on map disc.
2 CHECK DISPLAY
Check that displays other than the navigation display are
complete.
OK:
No other incomplete displays are found.
REPLACE RADIO ...
