Hyundai Excavator R210LC-7. Service and repair manual - page 12

4 - 5

POWER CIRCUIT(up to #0179)

21074EL03

4 - 5-1

1. POWER CIRCUIT (from #0180 to #1000)

The negative terminal of battery is grounded to the machine chassis through master switch.
When the start switch is in the OFF position, the current flows from the positive battery terminal as
shown below.

OPERATING FLOW
Battery Battery relay Fusible link

¡†

CN-60

¡‡

Fuse box

¡†

No.1

¡‡

l/conn

¡†

CN-8(12)

¡‡

Start switch

¡†

CS-2(1)

¡‡

Power relay

¡†

CR-35(30)]

Fuse box

¡†

No.2

¡‡

I/conn

¡†

CN-10(6)

¡‡

Room lamp

¡†

CL-1(2)

¡‡

Door switch

¡†

CS-1

¡‡

Cassette radio

¡†

CN-27(11)

¡‡

Fuse box

¡†

No.3

¡‡

l/conn

¡†

CN-11(4)

¡‡

AC & Heater controller

¡†

CN -116(3, 4)

¡‡

Fuse box

¡†

No.4

¡‡

I/conn

¡†

CN - 5(4)

¡‡

I/conn

¡†

CN -17(5)

¡‡

Wiper motor controller

¡†

CN-141(7)

¡‡

Wiper motor

¡†

CN-21(4)

¡‡

Fuse box

¡†

No.5

¡‡

CPU controller

¡†

CN-50(7)

¡‡

Fuse box

¡†

No.6

¡‡

I/conn

¡†

CN-11(5)

¡‡

Relay(Hi, M2)

I/conn : Intermediate connector

CHECK POINT

Engine

Start switch

Check point

Voltage

GND : Ground

OFF

- GND (Battery 1EA)

¤Ł

- GND (Battery 2EA)

¤Ø

- GND (Battery 2EA)

¤Œ

- GND (Fusible link)

10~12.5V

20~25V

4 - 5-2

POWER CIRCUIT (from #0180 to #1000)

21074EL03A

2. STARTING CIRCUIT(up to #1000)

OPERATING FLOW
Battery(+) terminal Battery relay[CR-1] Reset button[CS-61] Fuse box [No.1]

I/conn

[

CN-8(12)

]

Start key

[

CS-2(1)

]

Start switch : ON

Start switch ON

[

CS-2(2)

]

I/conn

[

CN-8(11)

]

Diode[DO-2]

Battery relay [CR-1]:Battery relay operating(All power is supplied with the electric component)
Start switch ON

[

CS-2(3)

]

I/conn

[

CN-8(10)

]

Power relay [CR-35(86)

(87)]

Fuse box [No.12] I/conn [CN-1(5)] Fuel cut-off [CN-79(1)]

Start switch : START
Start switch START

[

CS-2(5)

]

I/conn

[

CN-8(9)

]

Safety relay [CR-5(86)

(30)]

I/conn [CN-3(4)]

Start relay [CR-23]

I/conn [CN-1(4)]

Fuel cut off [CN-79(2)]

4 - 6

Engine

Start switch

Check point

Voltage

GND (Battery)

Ł -

GND (Start key)

Ø -

GND (Battery relay M4)

Operating

Start

Œ -

GND (Starter B )

20 ~ 25V

º -

GND (Starter M)

GND (Start relay)

GND (Battery relay M8)

2) CHECK POINT

GND : Ground

4 - 7

STARTING CIRCUIT(up to #1000)

21074EL05

3. CHARGING CIRCUIT(up to #1000)

When the starter is activated and the engine is started, the operator releases the key switch to the ON
position.
Charging current generated by operating alternator flows into the battery through the Battery
relay(CR-1).
The current also flows from alternator to each electrical component and controller through the fuse
box.

OPERATING FLOW

Warning flow
Alternator

¡–

terminal

I/conn

¡†

CN-3(6)

¡‡

CPU Controller [CN-51(9)]

Cluster warning lamp (Via serial interface)

Charging flow
Alternator "B

terminal

Battery relay(M8) Battery(+) terminal

Reset button[CS-61]

Fuse box

4 -8

Engine

Start switch

Check point

Voltage

- GND (Battery voltage)

¤Ł

- GND (Battery relay)

¤Ø

- GND (Alternator B

¡q

terminal)

20~27V

¤Œ

- GND (Alternator I terminal)

¤º

- GND (CPU)

(1)

(2)

CHECK POINT

GND : Ground

4 -9

CHARGINGING CIRCUIT(up to #1000)

21074EL06

4 - 10

4. HEAD LAMP CIRCUIT(up to #1000)

OPERATING FLOW
Fuse box (No.14) I/conn

[

CN-7(7)

]

Switch panel [CN-116(9)]

When lamp switch ON
Switch panel [CN-116(1)] I/conn [CN-7(1)]

I/conn [CN-10(2)] Cassette radio illumination [CN-27(7)]
I/conn [CN-11(8)] AC & Heater controller illumination [CN-116(5)]
Head lamp [CL-4(2)] : Head lamp ON
I/conn[CN-6(8)] Cigarlight [CL-2]

Engine

Key switch

Check point

Voltage

- GND (Fuse box)

¤Ł

- GND (Switch power input)

¤Ø

- GND (Switch power output)

2) CHECK POINT

GND : Ground

STOP

20~25V

4 - 11

HEAD LAMP CIRCUIT(up to #1000)

21074EL07

4 - 12

5. WORK LAMP CIRCUIT(up to #1000)

OPERATING FLOW
Fuse box (No.15) I/conn

[

CN-7(8)

]

Switch panel [CN-116(10,11)]

When work lamp switch ON
Work lamp switch ON

[

CN-116(2,3)

]

I/conn [CN-7(2)] I/conn [CN-12(1)]

Work lamp ON [CL-5(2), CL-6(2)]

Engine

Key switch

Check point

Voltage

- GND (Fuse box)

¤Ł

- GND (Switch power input)

¤Ø

- GND (Switch power output)

¤Œ

- GND (Work lamp)

2) CHECK POINT

GND : Ground

STOP

20~25V

4 - 13

WORK LAMP CIRCUIT(up to #1000)

21074EL08

4 - 14

6. CAB LAMP CIRCUIT(up to #1000)

OPERATING FLOW
Fuse box (No.16) I/conn

¡†

CN-7(12)

¡‡

Switch panel [CN-116(16,17)]

When Lamp switch ON
Lamp switch ON [CN-116(7, 8)] I/conn [CN-7(6)] I/conn [CN-10(11)]
Cab light ON [CL-8(2), CL-9(2)]

2) CHECK POINT

Engine

Start switch

Voltage

Check point

- GND (Fuse box)

- GND (Switch power input)

- GND (Switch power output)

- GND (Cab lamp)

STOP

20 ~ 25V

GND : Ground

4 - 15

CABIN LIGHT

CL-9

CL-8

AC& HEATER

CPU

10A

20A

10A

20A

10A

20A

10A

20A

FUSE BOX

CN-46

SPARE

FUEL FILLER P/P

SOLENOID 3

SAFETY SOL

SOLENOID 1

TRAVEL

ETHER(PRE-HEAT)

CIGAR LIGHTER

HORN

AC& HEATER

BEACON LAMP

CABIN LAMP

WORK LAMP

HEAD LAMP

WIPER MOTOR

SWITCH PANEL

CONVERTOR

CPU

FUEL CUT-OFF

CLUSTER

CASSETTE RADIO

WIPER

AC& HEATER

ROOM LAMP

START KEY

CN-7

CABIN LIGHT 24V

INT. SIG

TRAVEL ALARM

GND

WASHER SIG

WORK LIGHT 24V

HEAD LIHGT 24V

CABIN LIGHT OUT

POWER 24V

PRE-HEAT

WIPER MOTOR DRIVE

WORK LIGHT OUT

HEAD LIGHT OUT

CN-116

SWITCH PANEL

CN-10

CAB LAMP CIRCUIT(up to #1000)

21074EL09

4 - 16

7. BEACON LAMP CIRCUIT(up to #1000)

OPERATING FLOW
Fuse box (No.17) I/conn

[

CN-8(3)

]

Beacon lamp switch

[

CN-23(6)

]

When lamp switch ON
Beacon lamp switch ON

[

CS-23(2)

]

Switch lndicator lamp ON

[

CS-23(9)

]

l/conn

[

CN-8(4)

]

l/conn

[

CN-10(10)

]

Beacon lamp ON

[

CL-7

]

CHECK POINT

GND : Ground

Engine

Start switch

Check point

Voltage

STOP

- GND(Fuse box)

¤Ł

- GND(Switch power input)

¤Ø

- GND(Switch power output)

¤Œ

- GND(Beacon lamp)

20~25V

4 - 17

START KEY

ROOM LAMP

AC & HEATER

WIPER+

CASSETTE RADIO

CLUSTER

CPU

CONVERTOR

SWITCH PANEL

FUEL CUT-OFF

WIPER MOTOR

HEAD LAMP

WORK LAMP

CAB LAMP

BEACON LAMP

AC & HEATER

HORN

CIGAR LIGHTER

ETHER(PRE-HEAT)

TRAVEL

SOLENOID 1

SOLENOID 3

FUEL FILLER PUMP

SPARE

CN-46

FUSE BOX

20A

10A

20A

10A

20A

10A

20A

10A

CPU B+

20A

SPARE

SAFETY SOLENOID

AC BLOWER

CN-8

CN-10

CS-23

BEACON LAMP SW

BEACON LAMP

CL-7

CN-7

SWITCH PANEL

CN-116

HEAD LIGHT OUT

WORK LIGHT OUT

WIPER MOTOR DRIVE

PRE-HEAT

POWER 24V

CABIN LIGHT OUT

HEAD LIHGT 24V

WORK LIGHT 24V

WASHER SIG

GND

TRAVEL ALARM

INT. SIG

CABIN LIGHT 24V

CAB LIGHT

CL-8

CL-9

BEACON LAMP CIRCUIT(up to #1000)

29074EL08

4 - 18

8. WIPER AND WASHER CIRCUIT(up to #1000)

OPERATING FLOW

Key switch ON
Fuse box (No.11) I/conn [CN-7(5)] Switch panel [CN-116(6)]
Fuse box (No.4) I/conn [CN-5(4)] I/conn [CN-17(5)] Wiper motor controller [CN-141(7)]

Wiper motor [CN-21(4)]

Fuse box (No.13)

I/conn [CN-6(5)]

l/conn [CN-17(4)]

Wiper motor controller [CN-141(6)]

Washer pump [CN-22(2)]

Wipe switch ON : 1st step(Intermittent)
Wiper switch ON [CN-116(15)] I/conn[CN-9(4)] I/conn[CN-17(8)]
Wiper motor controller [CN-141(10)

(3)] Wiper motor intermittently operating [CN-21(6)]

Wiper switch ON : 2nd step(Low speed)
Wiper switch ON [CN-116(4)] I/conn [CN-7(3)] I/conn [CN-6(9)] I/conn[CN-17(2)]
Wiper motor controller [CN-141(2)

(4)] Wiper motor operating [CN-21(2)]

Washer switch ON
Washer switch ON [CN-116(12)] I/conn [CN-7(9)] I/conn [CN-5(1)] I/conn [CN-17(7)]

Wiper motor controller [CN-141(9)

(8)] I/conn [CN-17(6)] I/conn [CN-6(11)]

Washer pump [CN-22(1)] Washer operating.

Fuse box(No.13) I/conn [CN-6(5)] I/conn [CN-17(4)] Wiper motor controller
[CN-141(6)

(4)] Wiper motor operating [CN-21(2), Low speed]

Auto parking(When switch OFF)
Switch OFF [CN-116(15)] Wiper motor parking position by wiper motor controller

CHECK POINT

(1)

(2)

(3)

(4)

(5)

GND : Ground

Engine

Start switch

Check point

Voltage

STOP

- GND(Fuse box)

¤Ł

- GND(Switch power input)

¤Ø

- GND(Switch power output)

¤Œ

- GND(Wiper Power input)

¤º

- GND(Wiper power output)

- GND(Wiper motor)

20~25V

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