Toyota 2VZ-FE, Manual

Page: 252 / 324

1 VIBRATION METHOD:
When vibration seems to be the major
cause. (cont’d)
WIRE HARNESS
Slightly shake the wire harness vertically and horizontally.
The connector joint, fulcrum of the vibration, and body
through portion are the major areas to be checked thor-
oughly.
PARTS AND SENSORS
Apply vibration slightly by a finger to the part or sensor
considered to be the problem cause and check if the mal-
function will occur.
HINT: Strong vibration to the relays may result in open re-
lays.
2 HEAT METHOD:
When the problem seems to occur when the
suspect area is heated.
Heat the component that is likely the cause of the mal-
function with a hair dryer or similar object. Check to see
if the malfunction will occur.
NOTICE:
D
Do not heat to more than 605C (1405F)
(Temperature limit that the component can be
touched with a hand.).
D
Do not apply heat directly to part in the ECU.
3
WATER SPRINKLING
METHOD:
When the malfunction seems to occur on a
rainy day or in a high–humidity condition.
Sprinkle water onto the vehicle and check to see if the
malfunction will occur.
NOTICE:
D
Never sprinkle water directly into the engine
compartment, but indirectly change the
temperature and humidity by applying water
spray onto the radiator front surface.
D
Never apply water directly onto the electronic
components.
HINT:
D
If a vehicle is subject to water leakage, the leaked
water may contaminate the ECU. When testing a
vehicle with a water leakage problem, special caution
must be paid.
– ENGINE TROUBLESHOOTING Symtom Simulation
TR–15