Checking The Intake Air Temperature Sensor; Checking The Gear Position Switch - Yamaha YZ 2020 Series Owner's Service Manual

2 1
c. Start the engine.
d. Measure the throttle position sensor input
voltage.
EAM30307
CHECKING THE INTAKE AIR
TEMPERATURE SENSOR
1. Remove:
• Intake air temperature sensor
(from the air filter case)
EWA14110
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.
2. Check:
• Intake air temperature sensor resistance
Out of specification  Replace.
Intake air temperature sensor re-
sistance
5400–6600  at 0 C (5400–6600
 at 32 F)
Intake air temperature sensor re-
sistance
289–391  at 80 C (289–391  at
176 F)
a. Connect the digital circuit tester () to the
intake air temperature sensor terminal.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
• Positive tester probe 
Brown/White "1"
• Negative tester probe 
Black/Blue "2"
ELECTRICAL COMPONENTS
EAM30467

CHECKING THE GEAR POSITION SWITCH

1. Remove:
• Gear position switch
2. Check:
• Gear position switch
Out of specification  Replace.
3.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with tachom-
eter
YU-A1927
Continuity
Positive tester probe 
Sky blue "1"
Negative tester probe 
Sensor terminal "a"
Continuity
Positive tester probe 
Pink "2"
Negative tester probe 
Sensor terminal "b"
Continuity
Positive tester probe 
Pink "2"
Negative tester probe 
Sensor terminal "c"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "d"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "e"
Continuity
Positive tester probe 
Yellow/White "3"
Negative tester probe 
Sensor terminal "f"
8-56
1 2