Download Kawasaki Z750S Servi..

FUEL SYSTEM (DFI) 3-59
Atmospheric Pressure Sensor (Service Code 15)
Output Voltage Inspection
the output voltage at the ECU in the same way
• Measure
as input voltage inspection. Note the following.
Digital Meter [A]
ECU Connector [B]
Atmospheric Pressure Sensor Output Voltage
Connections to ECU
Meter (+) → G/W lead (terminal 4)
Meter (–) → BR/BK lead (terminal 14)
Connections to ECU
(Immobilizer Equipped Models [C])
Meter (+) → G/W lead (terminal 21)
Meter (–) → BR/BK lead (terminal 20)
Usable Range:
3.74 ∼ 4.26 V DC at the standard
atmospheric pressure (101.32 kPa,
76 cmHg abs.)
NOTE
○The output voltage changes according to the local atmospheric pressure.
the ignition switch OFF.
• Turn
If the output voltage is within the usable range, check the
ECU for its ground, and power supply (see ECU section).
If the output voltage is out of the standard, remove the
seat cover and check the wiring. And if the output voltage
is 4.8 V, the ECU is normal.
If the wiring is good, check the sensor for various vacuum.
If the output voltage for various vacuum is normal, check
the ECU for its ground, and power supply (see ECU section).
○Determine the local altitude (elevation).
If you know the local atmospheric pressure using a
barometer, substitute the atmospheric pressure for Pv
(throttle vacuum) in the vacuum sensor chart (see Inlet
Air Pressure Sensor section).
○Get the usable range of the atmospheric pressure sensor
output voltage in the same way as Output Voltage Inspection of the inlet air pressure sensor and check if Va (output
voltage) is within the usable range or not.
If you know the local altitude, use the following chart.
For example:
Suppose the local altitude is 1 300 m (4 200 ft) and the
sensor output voltage Va is 3.3 V.
Plot this H (1 300 m) at a point [1] on the following chart
and draw a vertical line through the point. Then, you can
get the usable range [2] of the sensor output voltage.
Usable Range = 3.2 ∼ 3.64 V
Plot Va (3.3 V) on the vertical line → Point [3]
Results: In the chart, Va is within the usable range
and the sensor is normal.