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:
Dinghy towing
Your vehicle is not designed to be dinghy towed (with 4 wheels
on the ground) behind a motor home.
NOTICETo avoid serious damage to your vehicle
Do not tow your vehicle with four wheels
on the ground.
To prevent causing serious damage to the transaxle and Active
Torque ...
Problem symptoms table
SLIDING ROOF SYSTEM
Symptom
Suspected area
AUTO function does not operate
Sliding roof motor assembly
Sliding roof system does not operate
ECU-IG fuse
S/ Roof fuse
IG1 relay
Sliding roof housing assembly
Sliding roof motor switc ...
Replacing light bulbs
Headlight low beams (halogen bulb)
For left side only: Open the fuse box cover.
Unplug the connector while
pushing the lock release.
Turn the bulb base counterclockwise.
Install a new light bulb.
Align the 3 tabs on the light bulb
with the mounting, and insert.
...
