Yamaha Tracer MT09TRA - Service manual > Checking the radiator fan motor

1. Check:

• Radiator fan motor

Faulty/rough movement → Replace.

a. Disconnect the radiator fan motor coupler from the wire harness.

b. Connect the battery (DC 12 V) as shown.

• Positive tester probe blue "1"
• Negative tester probe black "2"

c. Measure the radiator fan motor movement.

Checking the coolant temperature sensor

1. Remove:

• Coolant temperature sensor

WARNING

• Handle the coolant temperature sensor with special care.
• Never subject the coolant temperature sensor to strong shocks. If the coolant temperature sensor is dropped, replace it.

2. Check:

• Coolant temperature sensor resistance

Out of specification → Replace.

Coolant temperature sensor resistance 2510-2780 20 ºC (68 ºF)

Coolant temperature sensor resistance 210-221 100 ºC (212 ºF)

a. Connect the pocket tester (* 1 k) to the coolant temperature sensor as shown.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

b. Immerse the coolant temperature sensor "1" in a container filled with coolant "2".

TIP

Make sure the coolant temperature sensor terminals do not get wet.

c. Place a thermometer "3" in the coolant.

d. Heat the coolant or let it cool down to the specified temperatures.

e. Measure the coolant temperature sensor resistance.

3. Install:

• Coolant temperature sensor

Coolant temperature sensor 16 Nm (1.6 m*kgf, 12 ft*lbf)

Checking the throttle position sensor

1. Remove:

• Throttle position sensor (from the throttle bodies)

NOTICE

• Handle the throttle position sensor with special care.
• Never subject the throttle position sensor to strong shocks. If the throttle position sensor is dropped, replace it.

2. Check:

• Throttle position sensor maximum resistance Out of specification → Replace the throttle position sensor.

Resistance 1.20-2.80 k

a. Connect the pocket tester (* 1 k) to the throttle position sensor terminals as shown.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

• Positive tester probe → blue "1"
• Negative tester probe → black/blue "2"

b. Measure the throttle position sensor maximum resistance.

3. Install:

• Throttle position sensor

TIP

When installing the throttle position sensor, adjust its angle properly. Refer to "ADJUSTING THE THROTTLE POSITION SENSOR"

Checking the accelerator position sensor

1. Remove:

• Accelerator position sensor (from the throttle bodies)

WARNING

• Handle the accelerator position sensor with special care.
• Never subject the accelerator position sensor to strong shocks. If the accelerator position sensor is dropped, replace it.

2. Check:

• Accelerator position sensor maximum resistance

Out of specification → Replace the accelerator position sensor.

Resistance 1.08-2.52 k

a. Connect the pocket tester (* 1 k) to the accelerator position sensor terminals as shown.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

• Positive tester probe → blue "1"
• Negative tester probe → black/blue "2"

b. Measure the accelerator position sensor maximum resistance.

3. Install:

• Accelerator position sensor

TIP

When installing the accelerator position sensor, adjust its angle properly. Refer to "ADJUSTING THE ACCELERATOR POSITION SENSOR"

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