97
4. Connect the MAP sensor to the harness; then using
MaxiClips, connect the red tester lead to the
brown/white wire and the black tester lead to the
black/pink wire. With the engine running at idle
speed, the meter should read approximately 2.5 DC
volts (MAP sensor signal).
NOTE: If the meter does not read as specified,
replace the sensor.
INLET AIR TEMPERATURE (IAT)
SENSOR
NOTE: The ambient temperature of the engine and
in the intake and exhaust system must be at room
temperature (approximately 68° F) when performing
this test or an incorrect reading will occur.
Resistance
1. Disconnect the harness connector from the sensor at
the air box assembly.
2. Connect the meter leads (selector in OHMS position)
to the IAT sensor terminals.
3. At an ambient air temperature of 68°F, the meter will
read approximately 2300 Ohms.
NOTE: If the sensor is subjected to a decreased
ambient air temperature, the resulting meter reading
will increase. The opposite is true if the ambient air
temperature is increased.
NOTE: If the meter does not read as specified,
replace the sensor.
Voltage
1. With the connector still disconnected from the IAT
sensor, set the meter to DC volts.
2. Connect the red meter lead to the green/red wire and
the black meter lead to ground. With the ignition
switch set to the ON position the meter will read
approximately 5 DC volts.
3. Connect the red meter lead to the pink/black wire
and the black meter lead to ground. With the ignition
switch set to the ON position, the meter will read
approximately 0.003 DC volts.
4. Connect the harness connector to the IAT sensor,
then using Maxi Clips, connect the red tester lead to
the green/red wire. Connect the black tester lead to
the pink/black wire. With the engine at idle, the
meter should read approximately 2.9 DC volts.
NOTE: If the specifications provided in steps 2 and
3 are not observed on the meter, troubleshoot the har-
ness pins, harness wires, or the ECM.
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR
1. Connect the meter leads (selector in OHMS position)
to the sensor terminals.
2. Suspend the sensor and a thermometer in a container
of engine oil; then heat the oil.
NOTE: Neither the sensor nor the thermometer
should be allowed to touch the bottom of the con-
tainer or inaccurate readings will occur. Use wire
holders to suspend the sensor and thermometer.
3. If the readings are not as indicated, the sensor must
be replaced.
4. Install the sensor and tighten securely.
5. Connect the leads.
FUEL PUMP/FUEL LEVEL SENSOR
The electric fuel pump and fuel level sensor are not ser-
viceable components. If either component fails, it must
be replaced.
TESTING
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
! WARNING
Wear insulated gloves and safety glasses. Heated oil
can cause severe burns.
TEMPERATURE
RESISTANCE
-20° C (-4° F)
18.8k Ohms
40° C (105° F)
1.14k Ohms
100° C (212° F)
155 Ohms
Component data can be retrieved using the CATT II. Uti-
lize the Sensor Data screen.
! WARNING
Whenever any maintenance or inspection is made on
the fuel system during which there may be fuel leakage,
there should be no welding, smoking, open flames, etc.,
in the area.
AT THIS POINT
Prior to removing the electric fuel pump, the following
check should be performed to determine that removal is
necessary.
Содержание VLX 70002017
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