Service Manual (KLZ1000C) — page 627 of 762

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SELF-DIAGNOSIS SYSTEM 17-25
Intake Air Pressure Sensor #1 (Service Code 12) (DTC P0105, P0107)
 If the wiring is good, check the sensor for various vacuum.
•Remove the intake air pressure sensor #1 [A] and discon-
 nect the vacuum hose from the sensor.
•Connect an auxiliary hose [B] to the intake air pressure
 sensor #1.
•Temporarily install the intake air pressure sensor #1 to the
 motorcycle.
○Connect a digital meter [C], vacuum gauge [D], the fork oil
 level gauge [E] and the measuring adapter to the intake
 air pressure sensor #1.
    Special Tools - Fork Oil Level Gauge: 57001-1290
                    Vacuum Gauge: 57001-1369
                    Measuring Adapter: 57001-1700

    Intake Air Pressure Sensor #1 Output Voltage
       Connections to Adapter:
        Digital Meter (+) → Y (sensor R/BK) lead
        Digital Meter (–) → BK (sensor G) lead
○Turn the ignition switch on.
○Measure the intake air pressure sensor #1 output voltage
 from various vacuum readings, while pulling the handle of
 the fork oil level gauge.
○Check the intake air pressure sensor #1 output voltage,
 using the following formula and chart.
Suppose:
 Pg: Vacuum Pressure (Gauge) of Throttle Body
  Pl: Local Atmospheric Pressure (Absolute) measured by
      a barometer
 Pv: Vacuum Pressure (Absolute) of Throttle Body
 Vv: Sensor Output Voltage (V)
then
 Pv = Pl + Pg
For example, suppose the following data is obtained:
Pg = –8 cmHg (Vacuum Gauge Reading)
 Pl = 70 cmHg (Barometer Reading)
Vv = 3.2 V (Digital Meter Reading)
then
 Pv = 70 + (–8) = 62 cmHg (Absolute)
Plot this Pv (62 cmHg) at a point [1] on the chart and draw a
vertical line through the point. Then, you can get the usable
range [2] of the sensor output voltage.
    Usable range = 3.08  3.48 V
Plot Vv (3.2 V) on the vertical line. → Point [3].
Results: In the chart, Vv is within the usable range and
the sensor is normal.
  If the reading is out of the usable range, replace the sen-
  sor.
  If the reading is within the usable range, check the ECU
  for its ground and power supply (see ECU Power Supply
  Inspection(3-39)).
  If the ground and power supply are good, replace the
  ECU.