Yamaha Grizzly YF70GG, YF70GPG, YF70GPSG. Service manual (2016)

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

“

” (on)

f. Off

g. Comes on.

h. Initial lighting: 2 seconds

Goes off.

EBS30289

DIAGNOSTIC MODE

Setting the diagnostic mode (present and past malfunctions)

1. Disconnect the EPS self-diagnosis signal connector “1”.

2. Set the main switch to “

” (on).

3. Select the signaling mode by grounding the EPS self-diagnosis signal connector (male side) to the

EPS control unit “2” or disconnecting it from the unit as follows.

• Present malfunction signaling mode

Ground the connector “1” quickly* to the EPS control unit “2” over 2 times.

* Quickly = from 20 to 76 ms interval

TIP

• Because the “quickly” intervals are approximately the same as the intervals when sliding the connec-

tor “1” across the area “a” of the EPS control unit “2”, this method can also be used to set the diag-

nostic mode.

• To set the diagnostic mode, this step should be started within 5 seconds and completed within 10 sec-

onds after the main switch is turned to “

” (on).

The EPS warning light starts to show present fault codes.

• Past malfunction signaling mode

While the present malfunction mode is activated, briefly disconnect the connector “1”, ground it

again, and leave it grounded. The signaling mode is activated after 5 seconds.

The EPS warning light starts to show past fault codes.

4. Turn the main switch to “

” (off) to cancel the diagnostic mode.

TIP

• The diagnostic mode can also be canceled by riding the vehicle at speeds above 2 km/h (1.2 mi/h).

• When the diagnostic mode is selected and during the initial lighting of the EPS warning light, the EPS

control unit does not receive input from the EPS self-diagnosis signal connector.

5. Connect the EPS self-diagnosis signal connector.

Identifying fault codes

When the diagnostic mode is activated, the fault codes determined by the fail-safe specifications are

signaled by the EPS warning light as follows.

• Present malfunction signaling mode: Currently detected fault codes are signaled.

• Past malfunction signaling mode: Both previously detected fault codes and currently detected fault

codes are signaled.

Signaling method

9-70

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

Example 1: Fault code No. 23

0.5 × 3

0.5 × 5

EPS self-diagnosis signal connector

Display of the present malfunctions stops

Diagnostic mode

when the past malfunction display mode is

selected.

EPS warning light

Disconnected

Off

Grounded

Normal mode (diagnostic mode not activated)

Mode selection judgment

Present malfunction signaling mode

Past malfunction signaling mode

The EPS warning light comes on for 5

seconds during the diagnostic mode selection

judgment.

After the mode selection judgment is completed (present or past malfunction mode), the current fault

code signaling stops immediately, and then the first code of the mode is signaled 2 seconds later.

When a fault code is signaled, the EPS warning light goes off for 1 second between the units of 10 and

the units of 1 for the code. After a fault code is signaled, the warning light goes off for 3 seconds, and

then the next code is signaled.

Example 2: No malfunctions are detected

a c

1.5

a. EPS self-diagnosis signal connector

g. Mode selection judgment

b. EPS warning light

A. The EPS warning light comes on for 5

c. Disconnected

seconds during the diagnostic mode selection

d. Comes on.

judgment.

e. Goes off.

f. Grounded

9-71

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

After the mode selection judgment is completed (present display or past malfunction mode), the current

fault code signaling stops immediately, and then the EPS warning light starts flashing at 1.5-second in-

tervals.

Deleting fault codes

To delete fault codes, ground the EPS self-diagnosis signal connector 3 or more times within 5 seconds

while the present or past malfunction mode is activated. The currently selected mode remains active

after the fault codes of that mode are deleted.

a. EPS self-diagnosis signal connector

c. Grounded

b. Disconnected

T1: Connector grounded - - - - 0.1 T1

1.6 seconds

T2: Fault codes deleted - - - - - Maximum 1.5 seconds required

EBS30290

SELF-DIAGNOSTIC FUNCTION TABLE (EPS SYSTEM)

Fault code

Probable cause of mal-

Item

Symptom

No.

function

•

Open or short circuit in

wire harness.

No normal signals are received from

•

Malfunction in torque sen-

EPS torque sensor

the torque sensor.

sor.

•

Malfunction in EPS control

unit.

•

Open or short circuit in

wire harness.

No normal signals are received from

•

Malfunction in speed sen-

Speed sensor

the speed sensor.

sor.

•

Malfunction in EPS control

unit.

•

Open or short circuit in

wire harness.

No normal signals are received from

Engine speed signal

•

Malfunction in ECU.

the ECU.

•

Malfunction in EPS control

unit.

•

Open or short circuit in

wire harness.

No normal signals are received from

EPS motor

•

Malfunction in EPS motor.

the EPS motor.

•

Malfunction in EPS control

unit.

Relay contacts in the EPS control unit

Malfunction in EPS control

EPS control unit

are welded together.

unit.

9-72

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

Fault code

Probable cause of mal-

Item

Symptom

No.

function

• Faulty battery.

• Malfunction in the

charging system.

EPS control unit

Battery voltage has dropped.

Refer to “CHARGING

SYSTEM” on page 9-11.

• Malfunction in EPS control

unit.

Relay contacts in the EPS control unit

Malfunction in EPS control

EPS control unit

are welded together.

unit.

• Malfunction in the

charging system.

Battery voltage has increased.

Refer to “CHARGING

EPS control unit

Abnormality exists between the EPS

SYSTEM” on page 9-11.

and the ECU.

• Malfunction in EPS control

unit.

EBS30291

TROUBLESHOOTING DETAILS (EPS SYSTEM)

TIP

The malfunction history is stored even if the main switch is turned to “

” (off), therefore, be sure to

erase the history (present and past malfunction signaling modes) after repairing the cause of the EPS

system malfunction. The malfunction history must be erased in the diagnostic mode. Refer to “DIAG-

NOSTIC MODE” on page 9-70.

Fault code No. 11, 13, 15, 16

Fault code No.

11, 13,

Symptom

EPS torque sensor: no normal signals are received from the

15, 16

EPS torque sensor.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Connections

• Check the locking condition of the

Turning the main

• EPS torque sensor coupler

coupler.

switch to “

”

• Disconnect the coupler and check

(off).

the pins (bent or broken terminals

and locking condition of the pins).

• If there is a malfunction, connect

the coupler securely or replace the

wire harness.

Open or short circuit in EPS torque sen-

• Replace if there is an open or short

sor lead.

circuit.

• Between EPS torque sensor cou-

pler and EPS control unit coupler.

white-white

red-red

green-green

black-black

Defective EPS torque sensor.

• Replace if defective.

Refer to “CHECKING THE EPS

TORQUE SENSOR (for EPS mod-

els)” on page 9-98.

Malfunction in EPS control unit.

Replace the EPS control unit.

9-73

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

Fault code No. 21

Fault code No.

Symptom

Speed sensor: no normal signals are received from the speed

sensor.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Connections

• Check the locking condition of the

Starting the en-

• Speed sensor coupler

coupler.

gine and activat-

• EPS control unit coupler at the wire

• Disconnect the coupler and check

ing the vehicle

harness

the pins (bent or broken terminals

speed sensor by

and locking condition of the pins).

operating the ve-

• If there is a malfunction, connect

hicle above 5

the coupler securely or replace the

km/h (3 mi/h), or

wire harness.

turning the main

switch to “

”

Open or short circuit in wire harness.

• Replace if there is an open or short

(off), then to “

”

circuit.

(on), and then

• Between speed sensor coupler

deleting the fault

and joint coupler.

codes. Refer to

white-white

“DIAGNOSTIC

• Between joint coupler and EPS

MODE” on page

control unit coupler.

9-70.

white-white

Defective speed sensor.

• Replace if defective.

Refer to “CHECKING THE SPEED

SENSOR” on page 9-94.

Malfunction in EPS control unit.

Replace the EPS control unit.

Fault code No. 22

Fault code No.

Symptom

No normal signals are received from the ECU.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Connections

• Check the locking condition of the

Turning the main

• EPS control unit coupler at the wire

coupler.

switch to “

”

harness

• Disconnect the coupler and check

(off).

• ECU coupler at the wire harness

the pins (bent or broken terminals

and locking condition of the pins).

• If there is a malfunction, connect

the coupler securely or replace the

wire harness.

Open or short circuit in wire harness.

• Replace if there is an open or short

circuit.

• Between ECU coupler and EPS

control unit coupler.

orange/white-orange/white

Malfunction in ECU.

Replace the ECU.

Malfunction in EPS control unit.

Replace the EPS control unit.

9-74

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

Fault code No. 41, 42, 43, 45

Fault code No.

41, 42,

Symptom

EPS motor: no normal signals are received from the EPS motor.

43, 45

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Connections

• Check the locking condition of the

Turning the main

• EPS motor coupler

coupler.

switch to “

”

• Disconnect the coupler and check

(off).

the pins (bent or broken terminals

and locking condition of the pins).

• If there is a malfunction, connect

the coupler securely or replace the

wire harness.

Open or short circuit in EPS motor lead.

• Replace if there is an open or short

circuit.

• Between EPS motor and EPS con-

trol unit coupler.

red-red

black-black

Defective EPS motor.

Replace if defective.

Refer to “CHECKING THE EPS MO-

TOR (for EPS models)” on page

9-98.

Malfunction in EPS control unit.

Replace the EPS control unit.

Fault code No. 52

Fault code No.

Symptom

Relay contacts in the EPS control unit are welded together.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Malfunction in EPS control unit.

Replace the EPS control unit.

Turning the main

switch to “

”

(off).

Fault code No. 53

Fault code No.

Symptom

Battery voltage has dropped.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Faulty battery.

Replace or charge the battery.

Turning the main

Refer to “CHECKING AND

switch to “

”

CHARGING THE BATTERY” on

(off).

page 9-85.

Malfunction in rectifier/regulator or

Replace if defective.

charging system.

Refer to “CHECKING THE RECTIFI-

ER/REGULATOR” on page 9-93.

Malfunction in EPS control unit.

Replace the EPS control unit.

9-75

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EPS (ELECTRIC POWER STEERING) SYSTEM (for EPS models)

Fault code No. 54

Fault code No.

Symptom

Relay contacts in the EPS control unit are welded together.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Malfunction in EPS control unit.

Replace the EPS control unit.

Turning the main

switch to “

”

(off).

Fault code No. 55

Fault code No.

Symptom

Battery voltage has increased.

Abnormality exists between the EPS and the ECU.

Order

Item/components and probable cause

Check or maintenance job

Reinstatement

method

Faulty battery.

Replace the battery.

Turning the main

Refer to “CHECKING AND

switch to “

”

CHARGING THE BATTERY” on

(off).

page 9-85.

Malfunction in rectifier/regulator.

Replace if defective.

Refer to “CHECKING THE RECTIFI-

ER/REGULATOR” on page 9-93.

Malfunction in EPS control unit.

Replace the EPS control unit.

9-76

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ELECTRICAL COMPONENTS

EBS30292

CHECKING THE SWITCHES

Br/Y

Br/L

(BLACK)

Br/L

OFF

Y/W

R/Y

R/B

R/Y

L/Y

R/B

L/Y

R/B

(GRAY)

OFF

PUSH

L/W

G/R

2WD

L/W

G/R

4WD

G/W

LOCK

1. Main switch

8. Gear position switch

2. Light switch

9. Reverse switch

3. Engine stop switch

10. Rear brake light switch

4. Start switch

11. Front brake light switch

5. Override switch

12. Horn switch (except for CDN)

6. On-Command four-wheel-drive motor switch

and differential gear lock switch

7. Four-wheel-drive motor switch (differential

motor)

9-81

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ELECTRICAL COMPONENTS

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

wiring connections and if necessary, replace the switch.

ECB02380

NOTICE

Never insert the tester probes into the coupler terminal slots “a”. Always insert the probes from

the opposite end of the coupler, taking care not to loosen or damage the leads.

Pocket tester

90890-03112

Analog pocket tester

YU-03112-C

TIP

• Before checking for continuity, set the pocket tester to “0” and to the “Ω × 1” range.

• When checking for continuity, switch back and forth between the switch positions a few times.

The switches and their terminal connections are illustrated as in the following example of the main

switch.

The switch positions “a” are shown in the far left column and the switch lead colors “b” are shown in the

top row.

The continuity (i. e., a closed circuit) between switch terminals at a given switch position is indicated by

“

”. There is continuity between red, brown/blue, and brown when the switch is set to “ON”.

Br/L

OFF

Br/L

9-82

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ELECTRICAL COMPONENTS

EBS30293

• Avoid touching the glass part of a handle

CHECKING THE BULBS AND BULB

mounted light bulb to keep it free from oil,

SOCKETS

otherwise the transparency of the glass,

TIP

the life of the bulb, and the luminous flux

Do not check any of the lights that use LEDs.

will be adversely affected. If the handle

mounted light bulb gets soiled, thoroughly

Check each bulb and bulb socket for damage or

clean it with a cloth moistened with alcohol

wear, proper connections, and also for continuity

or lacquer thinner.

between the terminals.

Damage/wear → Repair or replace the bulb,

2. Check:

bulb socket or both.

• Bulb (for continuity)

Improperly connected → Properly connect.

(with the pocket tester)

No continuity → Repair or replace the bulb, bulb

No continuity → Replace.

socket or both.

Pocket tester

Types of bulbs

90890-03112

Analog pocket tester

The bulbs used on this vehicle are shown in the

YU-03112-C

illustration.

• Bulb “a” is used for the handle mounted light

TIP

and usually use a bulb holder that must be de-

tached before removing the bulb. The majority

Before checking for continuity, set the pocket

of these types of bulbs can be removed from

tester to “0” and to the “Ω × 1” range.

their respective sockets by turning them coun-

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terclockwise.

a. Connect the positive tester probe to terminal

“1” and the negative tester probe to terminal

“2”, and check the continuity.

b. Connect the positive tester probe to terminal

“1” and the negative tester probe to terminal

“3”, and check the continuity.

c. If either of the readings indicate no continuity,

replace the bulb.

▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

Checking the condition of the bulbs

The following procedure applies to all of the

bulbs.

1. Remove:

• Bulb

EWB03950

WARNING

Since the handle mounted light bulb gets ex-

tremely hot, keep flammable products and

Checking the condition of the bulb sockets

your hands away from it until it has cooled

The following procedure applies to all of the bulb

down.

sockets.

ECB03000

1. Check:

NOTICE

• Bulb socket (for continuity)

• Be sure to hold the socket firmly when re-

(with the pocket tester)

moving the bulb. Never pull the lead, other-

No continuity → Replace.

wise it may be pulled out of the terminal in

the coupler.

9-83

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ELECTRICAL COMPONENTS

Pocket tester

90890-03112

Analog pocket tester

YU-03112-C

TIP

Check each bulb socket for continuity in the

same manner as described in the bulb section;

however, note the following.

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a. Install a good bulb into the bulb socket.

b. Connect the pocket tester probes to the re-

spective leads of the bulb socket.

c. Check the bulb socket for continuity. If any of

the readings indicate no continuity, replace

b. If the pocket tester indicates “∞”, replace the

the bulb socket.

fuse.

▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

EBS30296

3. Replace:

CHECKING THE FUSES

• Blown fuse

The following procedure applies to all of the fus-

▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼

es.

a. Set the main switch to “

” (off).

ECB02590

b. Install a new fuse of the correct amperage

NOTICE

rating.

To avoid a short circuit, always set the main

c. Set the switch(es) to on to verify if the electri-

switch to “OFF” when checking or replacing

cal circuit is operational.

a fuse.

d. If the fuse immediately blows again, check

1. Remove:

the electrical circuit.

• Battery cover

Amperage

Refer to “GENERAL CHASSIS (1)” on page

Fuses

Q’ty

rating

4-1.

Main

40 A

2. Check:

• Fuse

EPS (for EPS models)

40 A

Radiator fan motor

20 A

Headlight

10 A

Ignition

10 A

Fuel injection system

15 A

Four-wheel-drive motor

10 A

Auxiliary DC jack

10 A

Signaling system

10 A

Spare

20 A

▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼

Spare

15 A

a. Connect the pocket tester to the fuse and

Spare

10 A

check the continuity.

EWB03660

TIP

WARNING

Set the pocket tester selector to “Ω × 1”.

Never use a fuse with an amperage rating

other than that specified. Improvising or us-

ing a fuse with the wrong amperage rating

may cause extensive damage to the electri-

9-84

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ELECTRICAL COMPONENTS

cal system, cause the lighting and ignition

be charged as explained in the charging

systems to malfunction and could possibly

method. If the battery is overcharged, the

cause a fire.

electrolyte level will drop considerably.

Therefore, take special care when charging

▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

the battery.

4. Install:

• Battery cover

TIP

Refer to “GENERAL CHASSIS (1)” on page

Since VRLA (Valve Regulated Lead Acid) bat-

4-1.

teries are sealed, it is not possible to check the

charge state of the battery by measuring the

EBS30297

specific gravity of the electrolyte. Therefore, the

CHECKING AND CHARGING THE BATTERY

EWB03640

charge of the battery has to be checked by mea-

WARNING

suring the voltage at the battery terminals.

Batteries generate explosive hydrogen gas

1. Remove:

and contain electrolyte which is made of poi-

• Battery cover

sonous and highly caustic sulfuric acid.

Refer to “GENERAL CHASSIS (1)” on page

Therefore, always follow these preventive

4-1.

measures:

• Front carrier

• Wear protective eye gear when handling or

• Battery holding bracket

working near batteries.

Refer to “GENERAL CHASSIS (2)” on page

• Charge batteries in a well-ventilated area.

4-6.

• Keep batteries away from fire, sparks or

2. Disconnect:

open flames (e.g., welding equipment,

• Battery leads

lighted cigarettes).

(from the battery terminals)

• DO NOT SMOKE when charging or han-

ECB02570

dling batteries.

NOTICE

• KEEP BATTERIES AND ELECTROLYTE

First, disconnect the negative battery lead

OUT OF REACH OF CHILDREN.

“1”, and then positive battery lead “2”.

• Avoid bodily contact with electrolyte as it

can cause severe burns or permanent eye

injury.

FIRST AID IN CASE OF BODILY CONTACT:

EXTERNAL

• Skin — Wash with water.

• Eyes — Flush with water for 15 minutes and

get immediate medical attention.

INTERNAL

• Drink large quantities of water or milk fol-

lowed with milk of magnesia, beaten egg or

3. Remove:

vegetable oil. Get immediate medical atten-

• Battery

tion.

4. Check:

ECB02390

• Battery charge

NOTICE

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• This is a VRLA (Valve Regulated Lead Acid)

a. Connect a pocket tester to the battery termi-

battery. Never remove the sealing caps be-

nals.

cause the balance between cells will not be

• Positive tester probe →

maintained and battery performance will

positive battery terminal

deteriorate.

• Negative tester probe →

• Charging time, charging amperage and

negative battery terminal

charging voltage for a VRLA (Valve Regu-

lated Lead Acid) battery are different from

those of conventional batteries. The VRLA

(Valve Regulated Lead Acid) battery should

9-85

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ELECTRICAL COMPONENTS

EWB03650

TIP

WARNING

• The charge state of a VRLA (Valve Regulated

Do not quick charge a battery.

Lead Acid) battery can be checked by measur-

ECB02580

ing its open-circuit voltage (i.e., the voltage

NOTICE

when the positive battery terminal is discon-

• Do not use a high-rate battery charger

nected).

• No charging is necessary when the open-cir-

since it forces a high-amperage current

cuit voltage equals or exceeds 12.8 V.

into the battery quickly and can cause bat-

tery overheating and battery plate damage.

b. Check the charge of the battery, as shown in

• If it is impossible to regulate the charging

the charts and the following example.

current on the battery charger, be careful

Example

not to overcharge the battery.

Open-circuit voltage = 12.0 V

• When charging a battery, be sure to remove

Charging time = 6.5 hours

it from the vehicle. (If charging has to be

Charge of the battery = 20-30%

done with the battery mounted on the vehi-

cle, disconnect the negative battery lead

from the battery terminal.)

• To reduce the chance of sparks, do not

plug in the battery charger until the battery

charger leads are connected to the battery.

• Before removing the battery charger lead

clips from the battery terminals, be sure to

turn off the battery charger.

• Make sure the battery charger lead clips are

in full contact with the battery terminal and

Open-circuit voltage (V)

that they are not shorted. A corroded bat-

Charging time (hours)

tery charger lead clip may generate heat in

Relationship between the open-circuit voltage

the contact area and a weak clip spring may

and the charging time at 20 °C (68 °F)

cause sparks.

These values vary with the temperature, the

• If the battery becomes hot to the touch at

condition of the battery plates, and the

any time during the charging process, dis-

electrolyte level.

connect the battery charger and let the bat-

tery cool before reconnecting it. Hot

batteries can explode!

• As shown in the following illustration, the

open-circuit voltage of a VRLA (Valve Reg-

ulated Lead Acid) battery stabilizes about

30 minutes after charging has been com-

pleted. Therefore, wait 30 minutes after

charging is completed before measuring

the open-circuit voltage.

Open-circuit voltage (V)

Charging condition of the battery (%)

Ambient temperature 20 °C (68 °F)

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5. Charge:

• Battery

(refer to the appropriate charging method)

A. Open-circuit voltage (V)

9-86

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ELECTRICAL COMPONENTS

B. Time (minutes)

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Charging method using a constant volt-

C. Charging

age charger

D. Ambient temperature 20 °C (68 °F)

a. Measure the open-circuit voltage prior to

E. Check the open-circuit voltage.

charging.

▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼

TIP

Charging method using a variable-current

Voltage should be measured 30 minutes after

(voltage) charger

the engine is stopped.

a. Measure the open-circuit voltage prior to

charging.

b. Connect a charger and ammeter to the bat-

tery and start charging.

TIP

c. Make sure that the current is higher than the

Voltage should be measured 30 minutes after

standard charging current written on the bat-

the engine is stopped.

tery.

b. Connect a charger and ammeter to the bat-

TIP

tery and start charging.

If the current is lower than the standard charging

TIP

current written on the battery, this type of battery

Set the charging voltage at 16-17 V. If the set-

charger cannot charge the VRLA (Valve Regu-

ting is lower, charging will be insufficient. If too

lated Lead Acid) battery. A variable voltage

high, the battery will be over-charged.

charger is recommended.

c. Make sure that the current is higher than the

d. Charge the battery until its charging voltage is

standard charging current written on the bat-

15 V.

tery.

TIP

Set the charging time at 20 hours (maximum).

If the current is lower than the standard charging

e. Measure the battery open-circuit voltage after

current written on the battery, set the charging

leaving the battery unused for more than 30

voltage adjust dial at 20-24 V and monitor the

minutes.

amperage for 3-5 minutes to check the battery.

12.8 V or more --- Charging is complete.

• Reaches the standard charging current →

12.7 V-12.0 V --- Recharging is required.

Battery is good.

Under 12.0 V --- Replace the battery.

• Does not reach the standard charging current

→

▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

Replace the battery.

6. Install:

• Battery

d. Adjust the voltage so that the current is at the

7. Connect:

standard charging level.

• Battery leads

e. Set the time according to the charging time

(to the battery terminals)

suitable for the open-circuit voltage.

ECB02560

f. If charging requires more than 5 hours, it is

NOTICE

advisable to check the charging current after

First, connect the positive battery lead “1”,

a lapse of 5 hours. If there is any change in

and then the negative battery lead “2”.

the amperage, readjust the voltage to obtain

the standard charging current.

g. Measure the battery open-circuit voltage after

leaving the battery unused for more than 30

minutes.

12.8 V or more --- Charging is complete.

12.7 V or less --- Recharging is required.

Under 12.0 V --- Replace the battery.

▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

9-87

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ELECTRICAL COMPONENTS

8. Check:

Result

• Battery terminals

Continuity

Dirt → Clean with a wire brush.

(between “3” and “4”)

Loose connection → Connect properly.

9. Lubricate:

• Battery terminals

Headlight relay 1

Recommended lubricant

Dielectric grease

10.Install:

• Battery holding bracket

• Front carrier

Refer to “GENERAL CHASSIS (2)” on page

4-6.

• Battery cover

Refer to “GENERAL CHASSIS (1)” on page

1. Positive battery terminal

4-1.

2. Negative battery terminal

EBS30298

3. Positive tester probe

CHECKING THE RELAYS

4. Negative tester probe

Check each switch for continuity with the pocket

tester. If the continuity reading is incorrect, re-

Result

place the relay.

Continuity

(between “3” and “4”)

Pocket tester

90890-03112

Analog pocket tester

Headlight relay 2

YU-03112-C

1. Disconnect the relay from the wire harness.

2. Connect the pocket tester (Ω × 1) and battery

(12 V) to the relay terminal as shown.

Check the relay operation.

Out of specification → Replace.

B L/Y

Starter relay

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

Br/B

R/W

4. Negative tester probe

L/Y

R/Y

Result

Continuity

(between “3” and “4”)

1. Positive battery terminal

2. Negative battery terminal

3. Positive tester probe

4. Negative tester probe

9-88

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ELECTRICAL COMPONENTS

Radiator fan motor relay

Four-wheel-drive motor relay 1

First step:

G/R

R/W

Br/B

1. Positive battery terminal

2. Negative battery terminal

1. Positive tester probe

3. Positive tester probe

2. Negative tester probe

4. Negative tester probe

3. Negative tester probe

Result

Continuity

(between “3” and “4”)

(between “1” and “2”)

No continuity

(between “1” and “3”)

Fuel injection system relay

Second step:

G/R

Br/B

1. Positive battery terminal

2. Negative battery terminal

1. Positive battery terminal

3. Positive tester probe

2. Negative battery terminal

4. Negative tester probe

3. Positive tester probe

4. Negative tester probe

Result

5. Negative tester probe

Continuity

(between “3” and “4”)

Result

No continuity

(between “3” and “4”)

Continuity

(between “3” and “5”)

9-89

Yamaha Grizzly YF70GG, YF70GPG, YF70GPSG. Service manual (2016) - part 22