Snowmobile Yamaha Phazer PZ50 (2007-2008 year). Instruction - part 86

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ELEC

DRIVE/REVERSE SELECTING SYSTEM

(PZ50GT/PZ50FX/PZ50M/PZ50VT/PZ50MP)

TROUBLESHOOTING

Check the main fuse, ignition fuse, and gear motor 
fuse.
Refer to “FUSE INSPECTION” in CHAPTER 2.

Check the battery.
Refer to “BATTERY INSPECTION” in CHAPTER 2.

Check the stator coil.
Refer to “CHARGING SYSTEM”.

Check the main switch.
Refer to “IGNITION SYSTEM”.

Check the drive position switch and reverse 
position switch.
Refer to “SIGNAL SYSTEM”.

Check the gear motor.

Check the gear motor relay 1, 2, and 3.

Check the load control relay.
Refer to “LIGHTING SYSTEM”.

Check the drive/reverse selecting system’s wiring.
Refer to “CIRCUIT DIAGRAM”.

Correct the connection and/or replace the rectifier/
regulator and/or ECU.

CANNOT SHIFT TO DRIVE OR REVERSE.

OK

FAULTY

Replace the main fuse, ignition fuse, and/or gear 
motor fuse.

OK

OUT OF SPECIFICATION

Replace and/or charge the battery.
Refer to “BATTERY INSPECTION” in CHAPTER 
2.

OK

OUT OF SPECIFICATION

Replace the stator coil assembly.

OK

NO CONTINUITY

Replace the main switch.

OK

FAULTY

Replace the drive position switch and/or reverse 
position switch.

OK

FAULTY

Replace the gear motor.

CORRECT

FAULTY

Replace the gear motor relay 1, 2, and/or 3.

OK

FAULTY

Replace the load control relay.

OK

FAULTY

Properly connect or repair the drive/reverse 
selecting system’s wiring.

8-57

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ELEC

DRIVE/REVERSE SELECTING SYSTEM

(PZ50GT/PZ50FX/PZ50M/PZ50VT/PZ50MP)

GEAR MOTOR

1. Remove:

• Gear motor

Refer to “SECONDARY SHAFT AND
REVERSE GEAR CASE” in CHAPTER 4.

NOTE:

Since the pinion gear is in the drive position when
the gear motor is removed, be sure to perform the
reverse position inspection first.

Reverse position inspection steps 

È:

• Connect the battery (12 V) to the gear motor

terminals as shown.

• Check that the pinion gear 3 turns clockwise.

Incorrect 

→ Replace the gear motor.

NOTE:

The pinion gear should rotate clockwise and stop in
the reverse position.

Drive position inspection steps 

É:

• Connect the battery (12 V) to the gear motor

terminals as shown.

• Check that the pinion gear 3 turns counter-

clockwise.
Incorrect 

→ Replace the gear motor.

NOTE:

The pinion gear should rotate counterclockwise and
stop in the drive position.

2. Install:

• Gear motor

Refer to “SECONDARY SHAFT AND
REVERSE GEAR CASE” in CHAPTER 4.

Positive battery terminal 

→ Sky blue 1 

Negative battery terminal 

→ Blue/Black 2 

Positive battery terminal 

→ Brown/Red 4 

Negative battery terminal 

→ Sky blue 5 

L/B Br/R

Sb

3

2

1

È

L/B Br/R

Sb

3

4

5

É

8-58

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ELEC

DRIVE/REVERSE SELECTING SYSTEM

(PZ50GT/PZ50FX/PZ50M/PZ50VT/PZ50MP)

GEAR MOTOR RELAY 1

1. Remove:

• Gear motor relay 1 (with the black coupler)

Inspection steps:

• Connect the pocket tester (

Ω  × 1) to the gear

motor relay 1 terminals as shown.

• If gear motor relay 1 does not have continuity

between the red/green and brown/red termi-
nals, replace it.

• Connect the pocket tester (

Ω  × 1) and battery

(12 V) to the gear motor relay 1 terminals as
shown.

• If gear motor relay 1 does not have continuity

between the red/green and yellow/red termi-
nals, replace it.

Positive tester probe 

→ Red/Green 1 

Negative tester probe 

→ Brown/Red 2 

Positive battery terminal 

→ Red/Green 3 

Negative battery terminal 

→ Brown/Black 4 

Positive tester probe 

→ Red/Green 5 

Negative tester probe 

→ Yellow/Red 6 

1

2

R/G

Y/R

Br/R

R/G

Br/B

6

5

4

3

R/G

Y/R

Br/R

R/G

Br/B

GEAR MOTOR RELAY 2

1. Remove:

• Gear motor relay 2 (with the black coupler)

Inspection steps:

• Connect the pocket tester (

Ω  × 1) to the gear

motor relay 2 terminals as shown.

• If gear motor relay 2 does not have continuity

between the sky blue and black terminals,
replace it.

Positive tester probe 

→ Sky blue 1 

Negative tester probe 

→ Black 2 

1

2

Sb

R/G

B

R/G

Sb/W

8-59

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ELEC

DRIVE/REVERSE SELECTING SYSTEM

(PZ50GT/PZ50FX/PZ50M/PZ50VT/PZ50MP)

• Connect the pocket tester (

Ω  × 1) and battery

(12 V) to the gear motor relay 2 terminals as
shown.

• If gear motor relay 2 does not have continuity

between the sky blue and red/green terminals,
replace it.

Positive battery terminal 

→ Red/Green 3 

Negative battery terminal 

→ Sky blue/White 4 

Positive tester probe 

→ Sky blue 5 

Negative tester probe 

→ Red/Green 6 

6

5

4

3

Sb

R/G

B

R/G

Sb/W

GEAR MOTOR RELAY 3

1. Remove:

• Gear motor relay 3

Inspection steps:

• Connect the pocket tester (

Ω  × 1) and battery

(12 V) to the gear motor relay 3 terminals as
shown.

• If gear motor relay 3 does not have continuity

between the black and blue/black terminals,
replace it.

Positive battery terminal 

→ Yellow/Red 1 

Negative battery terminal 

→ Sky blue/White 

2 
Positive tester probe 

→ Black 3 

Negative tester probe 

→ Blue/Black 4 

4

3

2

1

B

Sb/W

L/B

Y/R