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:
Engine compartment
Overview
Jump-starting, positive battery terminal
Oil filler neck
Coolant reservoir, auxiliary cooling
Coolant reservoir, engine
Jump-starting, negative battery terminal
Vehicle identification number
Filler neck for washer fluid
Hood
Safety information
Warning
Improperly executed work in ...
Data list
HINT:
Reading the DATA LIST displayed on an intelligent tester
enables values, including those of the switches, sensors,
and actuators, to be checked without removing any
parts. Reading the DATA LIST as the first step in
troubleshooting is one method to shorten diagnostic
time.
NOTICE: ...
Parking lights, low beams
and roadside parking lights
General information
If the driver's door is opened when the drive-ready
state is switched off, the exterior lighting is
automatically switched off.
Parking lights
General information
The parking lights can only be switched on in the
low speed range.
Switching on
Press the button on the light
switch ...
