Yamaha Tracer MT09TRA - Service manual > Checking the relays

Electrical system / Electrical components / Checking the relays

Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, replace the relay.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

1. Disconnect the relay from the wire harness.

2. Connect the pocket tester (* 1) and battery (12 V) to the relay terminal as shown.

Check the relay operation.

Out of specification → Replace.

Starter relay

Starter relay

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

4. Negative tester probe

Relay operation Continuity (between "3" and "4")

Relay unit (starting circuit cut-off relay)

Relay unit (starting circuit cut-off relay)

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

4. Negative tester probe

Result Continuity (between "3" and "4")

Relay unit (fuel pump relay)

Relay unit (fuel pump relay)

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

4. Negative tester probe

Result Continuity (between "3" and "4")

Radiator fan motor relay

Radiator fan motor relay

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

4. Negative tester probe

Result Continuity (between "3" and "4")

Checking the turn signal/hazard relay

1. Check:

Out of specification → The wiring circuit from the main switch to the turn signal/hazard relay coupler is faulty and must be repaired.

Turn signal/hazard relay input voltage DC 12 V

a. Connect the pocket tester (DC 20 V) to the turn signal/hazard relay terminal as shown.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

Checking the turn signal/hazard relay

b. Turn the main switch to "ON".

c. Measure the turn signal/hazard relay input voltage.

2. Check:

Out of specification → Replace.

Turn signal/hazard relay output voltage DC 12 V

a. Connect the pocket tester (DC 20 V) to the turn signal/hazard relay terminal as shown.

Pocket tester 90890-03112

Analog pocket tester YU-03112-C

Checking the turn signal/hazard relay

b. Turn the main switch to "ON".

c. Measure the turn signal/hazard relay output voltage.

See also:

 Yamaha Tracer MT09TRA - Service manual > Checking and charging the battery

WARNING Batteries generate explosive hydrogen gas and contain electrolyte which is made of poisonous and highly caustic sulfuric acid. Therefore, always follow these preventive measures: Wear protective eye gear when handling or working near batteries. Charge batteries in a well-ventilated area. Keep batteries away from fire, sparks or open flames (e.g., welding equipment, lighted cigarettes). DO NOT SMOKE when charging or handling batteries. KEEP BATTERIES AND ELECTROLYTE OUT OF REACH OF CHILDREN. Avoid bodily contact with electrolyte as it can cause severe burns or permanent eye injury.

 Yamaha Tracer MT09TRA - Service manual > Checking the relay unit (diode)

1. Check: Relay unit (diode) Out of specification → Replace. Pocket tester 90890-03112 Analog pocket tester YU-03112-C

Owner's Manuals

Service manuals