When The Problem Seems To Occur When The Suspect Area Is Heated; Water Sprinkling Method; When A Malfunction Seems To Occur When Electrical Load Is Excessive - Toyota Tundra 2005 Service - Repair - Maintenance

2 HEAT METHOD: When the problem seems to occur when the suspect area is heated.
Heat the component that is the likely cause of the malfunction
with a hair dryer or similar device. Check whether or not if the
malfunction occurs.
NOTICE:
(1)
Do not heat to more than 60°C (140°F). (Exceeding this
temperature may damage components.)
(2)
Do not apply heat directly to parts in the ECU.
3

WATER SPRINKLING METHOD:

Sprinkle water onto the vehicle and check whether or not if the
malfunction occurs.
NOTICE:
(1) Never sprinkle water directly into the engine compart-
ment. Indirectly change the temperature and humidity
by applying water spray onto the front of the radiator.
(2) Never apply water directly onto electronic components.
HINT:
If a vehicle is subject to water leakage, the leaked water may
damage the ECU. When testing a vehicle with a water leakage
problem, special caution must be taken.
4 OTHER: When a malfunction seems to occur when electrical load is excessive.
Turn on all electrical loads including the heater blower, head
lights, rear window defogger, etc. and check to see if the mal-
function occurs.
INTRODUCTION − HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
When the malfunction seems to occur on a rainy day or in a
high−humidity condition.
Malfunction
ON
B02389
IN−25
B02390