Yamaha YZF-R1P Service Manual page 360

Fault code No. 22
Used diagnostic code No. 05 (intake temperature sensor)
Inspection operation item and probable cause Operation item and countermeasure
Installed condition of sensor
Defective intake temperature sensor.
Open or short circuit in wiring harness and/or
sub lead.
Connected condition of connector
Inspect the coupler for any pins that may
have pulled out.
Check the locking condition of the coupler.
FUEL INJECTION SYSTEM
Symptom Open or short circuit detected from the intake temperature sensor.
Check the installed area for looseness or
pinching.
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.
Tester positive probe → brown/white 1
Tester negative probe → black/blue 2
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?
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
If there is a malfunction, repair it and connect it
securely.
Intake temperature sensor coupler
Main wiring harness ECU coupler
Sub-wire harness coupler
7 - 19
2 1
Intake air temperature sensor
resistance
450 ~ 550 Ω at 20 °C
Intake air temperature sensor
25 Nm (2.5 m · kg, 18 ft · lb)
FI
Reinstatement
method
Reinstated by turn-
ing the main switch
ON.