Toyota All Models User Manual

Please refer to the following sources for additional information:
• Your vehicle’s Owner’s Manual
• Your vehicle’s Repair Manual
• Genuine Toyota Coolant Brochure
Moving parts like the fan blade and drive belts, as well as extreme
heat in the engine compartment or from the exhaust system can
result in serious injury.
• Approach with caution and care.
• Never take shortcuts when replacing parts.
• Improper servicing may damage your Toyota and lead to
personal injury.
• Unless you have proper knowledge, equipment and tools, you
should have your Toyota Dealer Service Department perform
the repairs and maintenance.
Proper installation of Genuine Toyota replacement parts is essential
for the safe and reliable operation of your vehicle.
Following these instructions will:
• Help to assure your personal safety
• Assist you in the proper replacement of specific parts
There are many variations in the step-by-step procedures used in
installing various parts, and varying skill levels of individuals doing
the parts replacement. These instructions cannot anticipate all
circumstances or provide advice and caution on each. If you are
in doubt concerning your ability to replace the part or have any
questions, consult your local Toyota Dealer Service Department
and have the work performed by an experienced technician.
For further assistance, contact your Toyota dealer.
REFERENCES
CAUTION
IMPORTANT SAFETY NOTICE
Visit our Web site at www.toyota.com
M/N 00405-HOWTO-THERM
CONDITION ACTION
The "Check Engine" light
comes on:
Take the vehicle to your Toyota
Dealer Service Department for
diagnosis and repair.
Engine runs hot or overheats: Check the coolant level in the
radiator when the engine is cold.
Check the radiator hoses and
drain cock for leaks.
Check the radiator, radiator cap,
coolant reservoir, heater hoses
and all hose connections for
leaks. The radiator should also
be inspected to ensure it’s free
and clear of leaves, debris, etc.
Remove the radiator cap when
the engine is cold; run the
engine for 5-10 minutes with
the radiator cap removed to
release air bubbles from the
cooling system (this procedure
may need to be repeated).
With the engine off and the
coolant still warm, touch the
upper and lower radiator
hoses. They should both be
warm. If one is cold, the
thermostat could be stuck in
the closed position, or, the
thermostat may have been
installed backwards.
If the problem persists, visit
your Toyota Dealer Service
Department for diagnosis and
repair. DO NOT DRIVE THE
VEHICLE if the engine overheats.
TROUBLESHOOTING
INSTRUCTIONS
(continued)
RECHECK COOLANT LEVEL – Shut the engine off, allow it to
cool and check the coolant level. Coolant level should also be
checked at the coolant reservoir (as per Owner’s Manual). Fill
the radiator as required. Refer to the Owner's Manual for exact
fill level specifications.
NOTE: If vehicle overheats after thermostat installation, check
with dealer for advanced diagnosis.
15
mWARNING: To prevent injuring yourself, allow the engine to
cool before starting work.
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Toyota All Models Specifications

General

Brand	Toyota
Model	All Models
Category	Automobile Parts
Language	English

Summary

Instructions and Troubleshooting

Recheck Coolant Level

Check coolant level after engine cools and fill radiator as required. Refer to Owner's Manual for fill specifications.

Troubleshooting Engine Overheating

Steps to diagnose engine running hot or overheating, including checking coolant, hoses, and radiator for leaks.

Troubleshooting Check Engine Light

Action to take when the "Check Engine" light illuminates on the vehicle: seek dealer diagnosis and repair.

References and Safety Information

Lists additional information sources, general cautions, and critical safety notices for vehicle maintenance.

Thermostat Replacement Preparation

Tools and Supplies Required

Lists all necessary tools, genuine Toyota parts, and safety equipment for thermostat replacement.

Hard to Service Models Note

Identifies specific Toyota models that may present difficulties during thermostat service.

Thermostat Location Guide

Explains the typical location of the thermostat housing on the engine where the upper radiator hose connects.

Thermostat Replacement Instructions

Disconnect Battery and Drain Coolant

Steps to disconnect the battery and drain engine coolant safely before proceeding with thermostat replacement.

Remove and Replace Thermostat

Detailed steps for removing the old thermostat, cleaning the housing, installing the new thermostat and gasket.

Reassembly and Leak Check

Instructions for reassembling parts, filling with coolant, bleeding air, and checking for leaks after replacement.