Yamaha YZF-R1P 2001-2003, Service Manual

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FI
FUEL INJECTION SYSTEM
Fault code No. 22 Symptom Open or short circuit detected from the intake temperature sensor.
Used diagnostic code No. 05 (intake temperature sensor)
Inspection operation item and probable cause Operation item and countermeasure Reinstatement
method
Installed condition of sensor Check the installed area for looseness or
pinching. Reinstated by turn-
ing the main switch
ON.
Defective intake temperature sensor. Replace if defective.
1. Remove the intake air temperature sensor
from the air filter case.
2. Connect the pocket tester (
Ω ×
100) to the
intake air temperature sensor terminal as
shown.
3. Measure the intake air temperature sensor
resistance.
WARNING
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
4. Is the intake air temperature sensor OK?
Open or short circuit in wiring harness and/or
sub lead. Repair or replace if there is an open or short
circuit.
Between sensor coupler and ECU coupler
Black/Blue - Black/Blue
Brown/White - Brown/White
Connected condition of connector
Inspect the coupler for any pins that may
have pulled out.
Check the locking condition of the coupler.
If there is a malfunction, repair it and connect it
securely.
Intake temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
Tester positive probe
→
brown/white 1
Tester negative probe
→
black/blue 2
2 1
Intake air temperature sensor
resistance
450 ~ 550
Ω
at 20 °C
T
R
.
.
Intake air temperature sensor
25 Nm (2.5 m · kg, 18 ft · lb)