COMPONENTS
Vehicle Speed Signal Circuit between Radio and Navigation Assembly
and Combination Meter
DESCRIPTION
The radio and navigation assembly receives a vehicle speed signal from the
combination meter and
information about the GPS antenna, and then adjusts vehicle position.
HINT:
A voltage of 12 V or 5 V is output from each ECU and then input to
the combination meter. The sig ...
Reassembly
1. INSTALL UNDERDRIVE PLANETARY RING GEAR
HINT:
Use a torque wrench with a fulcrum length of 160
mm (6.3 in.).
(a) Install a new snap ring to the outer race of the radial
ball bearing rear.
HINT:
When replacing the bearing, also replace the
counter driven gear with a new one.
(b) Us ...
General information
A large number of ECU controlled systems are used in the
SIENNA. In general, ECU controlled systems are considered
to be very intricate, requiring a high level of technical
knowledge to troubleshoot. However, most problem checking
procedures only involve inspecting the ECU controlled
system's c ...