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Performance Tool W2969 User Manual

Performance Tool W2969
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32
range to get a more accurate
reading.
For all other temperature sen-
sors:
Start engine and let idle until
upper radiator hose is warm.
Turn ignition key OFF.
Disconnect sensor wiring har-
ness and reconnect multimeter
test leads.
View and record reading on
display.
12.Test Results.
Good Sensor:
Temperature sensors HOT re-
sistance is at least 300 less
than its COLD resistance.
The key point is that the COLD
resistance decreases with in-
creasing temperature.
Bad Sensor:
There is no change between
the temperature sensors HOT
resistance from the COLD re-
sistance.
The temperature sensor is an
open or a short circuit.
Position Type
Sensors
Position sensors are potentiometers
or a type of variable resistor. They
are used by the computer to deter-
mine position and direction of move-
ment of a mechanical device. Typi-
cal position sensor applications are
throttle position sensors, EGR valve
position sensors, and vane air flow
sensors.
Test Procedure (see Fig. 29):
1. Insert BLACK test lead into
COM test lead jack.
2. Insert RED test lead into
test lead jack.
3. Disconnect wiring harness
from sensor.
4. Connect Test Leads.
Connect RED test lead to sen-
sor POWER pin.
Connect BLACK test lead to
sensor GROUND pin.
Refer to vehicle service manual
for location of sensor POWER
and GROUND pins.
5. Turn multimeter rotary switch
to 20K
range.
Fig. 29
Typical Toyota Throttle
Position Sensor
Red
Black
POWER GROUND
SIGNAL IDLE SWITCH

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Performance Tool W2969 Specifications

General IconGeneral
BrandPerformance Tool
ModelW2969
CategoryMultimeter
LanguageEnglish