Disconnect the intake air pressure sensor #1 connector and connect the measuring adapter [A] between these connectors.
[B] Main Harness
[C] Intake Air Pressure Sensor #1
[D] Digital Meter
Special Tool - Measuring Adapter: 57001-1700
Intake Air Pressure Sensor #1 Output Voltage Connections to Adapter: Digital Meter (+) → Y (sensor Y/BL) lead Digital Meter (–) → BK (sensor BR/BK) lead
Output Voltage
Usable Range: DC 3.80 4.20 V at
standard
atmospheric pressure (101.32 kPa,
76 cmHg)
NOTE
The output voltage changes according to local atmospheric pressure.
If the reading is out of the usable range, replace the sensor.
If the reading is within the usable range, remove the ECU and check the wiring for continuity between main harness connector.
Special Tool - Hand Tester: 57001-1394
Disconnect the ECU and sensor connectors.
Wiring Continuity Inspection
ECU Connector [A] ←→ Intake Air Pressure Sensor #1 Connector [B] Y/BL lead (ECU terminal 22) [C] BR/BK lead (ECU terminal 13) [D]
Turn the ignition switch to 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 sensor.
If the reading is within the usable range, check the ECU for its ground and power supply (see ECU Power Supply Inspection in the Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU (see ECU Removal/Installation in the Fuel System (DFI) chapter).
ID: Idling Ps: Standard Atmospheric Pressure (Absolute) Pv: Throttle Vacuum Pressure (Absolute) ST: Standard of Sensor Output Voltage (V) TO: Throttle Full Open UR: Usable Range of Sensor Output Voltage (V) Vv: Intake Air Pressure Sensor #1 Output Voltage (V) (Digital Meter Reading)
Intake Air Pressure Sensor #1 Circuit
1. ECU
2. Intake Air Pressure Sensor #1
3. Intake Air Pressure Sensor #2
Separator Operation Test
WARNINGGasoline is extremely flammable and can be
explosive
under certain conditions. Turn the ignition
switch OFF. Do not smoke. Make sure the area is
well-ventilated and free from any source of flame
or sparks; this includes any appliance with a pilot
light.
...
Upper Fairing Assembly Disassembly
Remove:
Upper Fairing Assembly (see Upper Fairing Assembly
Removal)
Headlight (see Headlight Removal/Installation in the
Electrical System chapter)
City Light (LED) (see City Light (LED) Removal/Installation
in the Electrical System chapter)
Remove the screws [A], and separate each ...
Intake Air Pressure Sensor #2 Output Voltage Inspection
Measure the output voltage at the intake air pressure sensor
#2 in the same way as input voltage inspection, note
the following.
Disconnect the intake air pressure sensor #2 connector
and connect the measuring adapter [A] between these
connectors.
[B] Main Harness
[C] Intake Air Pressu ...