Toyota Sienna Service Manual: Heater relay (for rear air conditioning system)
ON-VEHICLE INSPECTION
1. INSPECT REAR HEATER RELAY
(a) Remove the rear heater relay.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance 
If the resistance is not as specified, replace the rear heater relay.
Heater relay
ON-VEHICLE INSPECTION
1. INSPECT HEATER RELAY
(a) Remove the heater relay.
(b) Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the resistance i ...
Air conditioning control assembly
COMPONENTS
...
Other materials:
Replacing a flat tire
Chock the tires.
Slightly loosen the wheel nuts
(one turn).
Turn the tire jack portion A by
hand until the notch of the jack
is in contact with the jack point.
The jack point guides are located
on the side of rocker moulding.
They indicate the jack point po ...
ECM / PCM Processor
DESCRIPTION
The ECM continuously monitors its internal processors (CPUs), A/F sensor
transistors and heated oxygen
sensor (HO2S) transistors. This self-check ensures that the ECM is functioning
properly. These are
diagnosed by internal "mirroring" of the main and sub CPUs to det ...
Adjustment procedure
To select a mirror to adjust, turn
the switch.
Left
Right
To adjust the mirror, move the
switch.
Up
Right
Down
Left
...
