Máy đào HuynDai R170W-9 (Phần 7) - P6.3

GROUP 3 ELECTRICAL SYSTEM
1. WHEN STARTING SWITCH IS TURNED ON, MONITOR PANEL DISPLAY DOES NOT APPEAR
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No.7, 11.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.
Cause
YES

Defective cluster Replace
YES

Check voltage
between CN-56
(3) and (5)

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between
CN-5-CN-56

Check voltage
between
NO CN- 5 (3) and (5)

Starting switch : ON
Voltage : 20~32V

Remedy

Starting switch : ON
Voltage : 20~32V

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-5 (3)
-GND or fuse
No.7, 11

NO

Check voltage
YES

20~32V

NO

0V

CLUSTER

FUSE

POWER(24V)

1

6

GND

3

3

POWER IG(24V)

5

5

NO.7
FUSE
NO.11

CN-56

CN-5

14W96ES01

6-25


2.

COMMUNICATION ERROR FLASHES ON THE CLUSTER (HCESPN 840, FMI 2)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

Remedy

Defective cluster

Replace

YES Check voltage

between CN-56
(4, 8) and (3)

Check voltage
between
CN-5 (1) and (2)
Starting switch : ON
Voltage : 2V

Starting switch : ON
Voltage : 2V

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact

between CN-56
(4, 8)-CN-5 (1, 2)

NO

Defective MCU
Replace
Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-5 (1,
2)- CN-51(23, 33)

NO

Check voltage
YES

2V

NO

0V

CLUSTER
GND

3

3

MCU

RS485 RX

8

2

23

RS485 TX

RS485 TX

4

1

33

RS485 RX

CN-51
CN-56

CN-5

14W96ES02

6-26


3.

BATTERY CHARGING WARNING LAMP LIGHTS UP
UP(Starting switch : ON)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES
YES Check voltage

between CN-51
(39) and chassis

Check voltage
YES
between CN-2
(9) and chassis

NO
Voltage : 20~32V

Voltage : 20~32V

Check voltage

between alternator
terminal "2" and
chassis

Remedy

Defective MCU

Replace

Disconnection in
wiring harness or
poor contact
between CN-51
(39)-CN-2 (9)

Repair or replace
(after clean)

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-2 (9)
alternator terminal
"2"

NO

Engine : Running
Voltage : 20~32V

Defective alternator Replace

NO

Check voltage
YES

20~32V

NO

0V
ALTERNATOR
MCU

B+
1

39

9

2
3
4

P
L
FI

NC

G
3~

U

CN-74
CN-51

CN-2

17W96ES03

6-27


4.

WHEN COOLANT OVERHEAT WARNING LAMP LIGHTS UP (engine is started)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

Remedy

Check use HRDT Check or replace

Check resistance
YES between engine

harness connector
(15)-(38)
Spec : 180Ω~160 kΩ

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between temp
sensor-engine
harness connector

NO

Check resistance
between temp
sensor (A)-(B)
Starting switch : OFF
Spec : 180Ω~160 kΩ
See table

Defective coolant
temp sensor

NO

Replace

Check Table
Temperature (˚C )

0

25

50

80

95

Resistance (kΩ)

30~37

9.3~10.7

3.2~3.8

1.0~1.3

0.7~0.8

Engine ECM

SERVICE TOOL

CAN Lo

F

21

31

CAN Hi

E

20

21

RS232 TX

C

16

24

RS232 RX

B

15

34

P DUMP

A

9

12

CN-5

ENGINE COOLANT
TEMPERATURE SENSOR

CN-93
8

46

CAN_Hi

15

A

9

47

CAN_Lo

38

B

CN-3

OEM
connector

C

Engine harness
connector

CN-51

21096ES04

6-28


5.

WHEN AIR CLEANER WARNING LAMP LIGHTS UP (engine is started)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

Clogged air filter or Check filter or
defective switch
replace switch

Does display go
off when
disconnect
CD-10?
Starting switch : ON
Engine : Start

Remedy

YES

Check resistance
between CN-53
NO
(23) and chassis
Starting switch : OFF
Disconnect CN-53

NO

Short circuit in
wiring harness

between CD-10CN-53 (23)

Repair or replace
(After clean)

Defective MCU

Replace

Check resistance
YES

MAX 1Ω

NO

MIN 1MΩ

AIR CLEANER SWITCH

MCU

Pa
23

CD-10
CN-53
21096ES05

6-29

6.

WHEN ENGINE OIL PRESSURE WARNING LAMP LIGHTS UP (engine is started)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
NO

Defective circuit,
sensor or ECM.

Remedy
Contact Cummins.

NO Fault code 135

active?
Starting switch : ON

Fault code 386
active?

Voltage above
Refer to engine
normal or shorted fault code 135

to high source

YES

Starting switch : ON

Voltage above
Refer to engine
normal or shorted fault code 386
to high source

YES

Signal

ENGINE OIL
PRESSURE SENSOR

CN-93
8

46

Engine
ECM
47

9

SERVICE TOOL

CAN_Lo

F

21

31

CAN_Hi

E

20

21

RS232_TX

C

16

24

RS232_RX

B

15

34

P_DUMP

A

9

12

CN-5

CN-3

OEM
connector

Return

13
38

3
2

33

1

Engine harness

connector

+5V supply

CN-51
21096ES06

6-30


7.

WHEN HYDRAULIC OIL TEMPERATURE WARNING LAMP LIGHTS UP (engine is started)

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

Remedy

High temperature

Check hydraulic
oil temperature
(105˚C±2˚C),

Defective temp

sensor

Replace

Short circuit
between temp
sensor and MCU

Repair or replace

Resistance
YES between CD-1

(1, 2) is in range
of 164~151Ω?
Does display go
off when
disconnect
CD-1?
Starting switch : ON
Engine : Start

Starting switch : ON
Disconnect CD-1

NO
YES

Resistance
between CN-51

NO (36, 5) is 0~1Ω?
Starting switch : OFF
Disconnect CN-51

Defective controller Replace

NO

Check Table
Temperature (˚C )
Resistance (kΩ)

~ -30

~ -10

22.22 8.16
~31.78 ~10.74

~0

~ 40

5.18
~ 6.6

~ 70

~ 80

~ 90

~ 100

1.06
0.39 0.322 0.243 0.185 0.164
~1.28 ~0.476 ~0.298 ~0.219 ~0.167 0.151

MCU
HYDRAULIC OIL
TEMPERATURE SENDER
36

2

5

1

C

CD-1
CN-51

21096ES07

6-31

105~

8. WHEN COOLANT TEMPERATURE GAUGE DOES NOT OPERATE (HCESPN 304,
FMI 3 or 4)
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

Remedy

Check use HRDT Check or replace

Check resistance
YES between engine

harness connector
(15)-(38)
Spec : 180Ω~160 kΩ

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between temp
sensor-engine
harness connector

NO

Check resistance
between temp
sensor (A)-(B)
Starting switch : OFF
Spec : 180Ω~160 kΩ
See table

Defective coolant
temp sensor

NO

Replace

Check Table
Temperature (˚C )

0

25

50

80

95

Resistance (kΩ)

30~37

9.3~10.7

3.2~3.8

1.0~1.3

0.7~0.8

Engine ECM

SERVICE TOOL
CAN Lo

F

CAN Hi

21

31

E

20

21

RS232 TX

C

16

24

RS232 RX

B

15

34

P DUMP

A

9

12

CN-5

ENGINE COOLANT
TEMPERATURE SENSOR

CN-93
8

46

CAN_Hi

15

A

9

47

CAN_Lo

38

B

CN-3

OEM
connector

C

Engine harness
connector

CN-51

21096ES04

6-32


9. WHEN FUEL GAUGE DOES NOT OPERATE
OPERATE(HCESPN 301, FMI 3 or 4)
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES

YES

Check resistance
between fuel
sender (1) and
(2)

Remedy

Defective MCU or Replace
cluster

Check resistance
between CN-51
(5) and (38)
Starting switch : OFF

Disconnect CN-51
Spec : 50~600Ω

NO

Starting switch : OFF
Spec : 50~600Ω
See table

NO

Disconnection in
wiring harness or
poor contact
between fuel
sender-MCU

Repair or replace

Defective fuel
sender

Replace

Check Table
Range

Resistance (Ω)

Range

Resistance (Ω)

Full

50

5/12

400

11/12

100

4/12

450

10/12

150

3/12

500

9/12

200

2/12

550

8/12

250

1/12

600

7/12

300

Empty warning

700

6/12

350

-

-

MCU

FUEL LEVEL SENDER
38

2

5

1
CD-2

CN-51
21096ES09

6-33


10. WHEN SAFETY SOLENOID DOES NOT OPERATE
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No.23.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.
Cause
YES

Hydraulic system
malfunction

YES Check operation

of solenoid

NO

YES

Check resistance
YES between CN-4

(16) and chassis

Starting switch : ON
Voltage : 20~30V
Safety state

Check voltage
between CN-68
NO
(2) and chassis

Check hydraulic
system

Defective solenoid Replace

Safety lever : ON-OFF

Check voltage
between CN-68
(1) - (2)

Remedy

Starting switch : OFF
Safety state
Spec : 0Ω
Disconnect CN-4

YES

Check resistance
between CS-4
NO
(A)-(C)
Starting switch : OFF
Safety switch : ON-0Ω
OFF-∞

Safety lever : OFF
Starting switch : ON
Voltage : 20~30V

NO

NO

Disconnect in
wiring harness or
poor contact
between
CN-4-CN-68

Repair or replace
(after clean)

Disconnect in
wiring harness or
poor contact
between
CN-4-CS-4

Repair or replace
(after clean)

Defective safety
switch

Replace

Disconnection in
wiring harness
between
CN-68 (2)-fuse

Repair or replace

FUSE
NO.23
SAFETY SWITCH
C

B

A

A

14

B

15

2

C

16

1

SAFETY SOLENOID

CN-68

CS-4
CN-4

21096ES10

6-34

11. WHEN TRAVEL SPEED 1, 2 DOES NOT OPERATE (HCESPN 167, FMI 5 or 6)
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No.25 .
·After checking, insert the disconnected connectors again immediately unless otherwise specified.
Cause
YES

Disconnection in Repair or replace
wiring harness or
poor contact
between CN-70CN-52 or CN-181CN-52

Check resistance
YES between CN-70

(1)-(2) or
CN-181(1)-(2)
Starting switch : OFF
Spec : 30Ω
Disconnect CN-70

YES Check fault code

Remedy

Defective solenoid Replace

NO

167 active?
YES

Defective hydraulic Check hydraulic
system
system

Starting switch : ON

Check voltage
between CN-70
NO (1)-(2) or
CN-181(1)-(2)

Check if travel
speed lamps(
,
) change when
turning the RH
multifunction switch
on the cluster

Starting switch : ON
Spec : 20~30 V
Disconnect CN-70

Disconnection in Repair or replace
wiring harness or
poor contact

between CN-70fuse No. 25 or CN181-fuse No.25

NO

Starting switch : ON

YES

Defective cluster

Replace

Defective MCU

Replace

Check MCU
Y

NO

R

G

Starting switch : ON

NO

TRAVEL HIGH SPEED SOLENOID

FUSE

2

NO.25
1

MCU

CN-70
TRAVEL LOW SPEED SOLENOID
2
8

1

CN-181
CN-52
14W96ES11

6-35


lights up condition)

chassis
Check voltage
CN-3 (13) and
chassis

YES

Starting switch : ON
Spec : 20~30V

Disconnection in

NO wiring harness or

Key switch : ON
Spec : 20~30V

BATT (+)
BATT (+)
BATT (-)
BATT (-)

Check voltage
magnet coil and
chassis

Starting switch : START

1
2

NO.9

Check operation

of start relay
NO
CR-23

YES

YES Check voltage

between CN-2
(7) and chassis

Starting switch : START

Starting switch : ON

NO

Starting switch : START
Spec : 20~30V

Check operation
of anti-restart
NO relay CR-5

YES

Check voltage
between CR-5
NO
(1, 2)

5

5
6

6

3 2

ECM POWER RY
CR-35

NO.4

ⓐ

NO.20

POWER RY
CS-74

Disconnection in Repair or replace
wiring harness or
poor contact
between CN-2 (7)
-CR-5 (5)

1
2

CN-95
2
1

NO

Defective antirestart relay

Replace

Check voltage
between CR-23
and chassis

MASTER SW

FUSIBLE LINK
2
1

CN-60
CR-1

BATTERY

ⓑ

Starting switch : START
Spec : 20~30V

BATT RY
DO-1
YES

2
1

Defective start relay Replace

DIODE
NO

Starting switch : START
Spec : 20~30V

Disconnection in Repair or replace
wiring harness or
poor contact
between CN-2CR-5

CN-52
ANTI-RESTART RY

YES

Check voltage
between CR-5
(2) and chassis
Starting switch : START NO

Spec : 20~30V

15

MCU
CR-5
1 5 4

ⓑ

2
3

3
4

CIRCUIT BREAKER
MANUAL RESET

ⓐ

4 5 1

Defective start relay Replace

NO

Starting switch : START
Spec : 20~30V

5

CR-45

Defective magnet Replace
of start motor

YES between starter

4

35
59
60
36

Replace
Defective ECM
power relay CR-45

YES

1

CN-5

Repair or replace

NO.1

Check operation
start motor

3

B

ENGINE ECM

poor contact
between CN-3
(13) -CN-93 (39)

NO

0, I

ST C

BR ACC

4

4
3
2
1

2

Defective ECM or Replace
battery

CN-94

CS-2

Check voltage

YES CN-93 (39) and

Remedy

H

H0 I

2

YES

13
14
15

START KEY SW

KEY IG

39

4

Cause

CN-93
CN-3

1

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No. 1, 4, 9, 20.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

CN-125

12. WHEN ENGINE DOES NOT START (

1
2
3
4

Disconnection in Repair or replace
wiring harness or
poor contact
between CN-52
(15)-CR-5 (1)

2 3

5

ANTI-RESTART RY

START MOTOR

CN-2
7
8

CR-23
2
1

START RY

Disconnection in Repair or replace
wiring harness or
poor contact
between CS-2 (6)CR-5 (2)

CN-45

17W96ES12

6-36

13. WHEN STARTING SWITCH ON DOES NOT OPERATE
CN-93
CN-94
BATT (+)
BATT (+)
BATT (-)
BATT (-)

Cause

YES Check voltage

between DO-1
(1) and chassis

Defective start
switch

NO

YES Check voltage

between CS-2
(1) and chassis

YES

Check voltage
between CN-5
NO

(36) and chassis

Check voltage
and specific
gravity of battery

YES

Voltage : 20~30V

Check voltage
between CS-74
NO
(1) and chassis

Specific gravity : MIN 1.28
Voltage : MIN 24V

Voltage : 20~30V

NO

1
2

NO.9

5

5

6

2
3

6

5

3 2

ECM POWER RY
CR-35

NO.4

Replace

4 5 1

3
4

NO.1

NO.20

POWER RY
CS-74
1

2

CN-95
2
1

CIRCUIT BREAKER
MANUAL RESET

Disconnection in Charge or replace
wiring harness or (after clean)
poor contact
between CS-74 (1)
-CN-5 (36)

MASTER SW

FUSIBLE LINK
2
1

CN-60
CR-1

ⓐ
Battery capacity
too low

NO

3

CR-45

Disconnection in Replace
wiring harness or
poor contact
between CS-2 (1)CN-5 (36)

Voltage : 20~30V

4

35
59
60
36

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between DO-1 (1)CR-1 or defective
battery relay

Disconnection in Repair or replace
NO wiring harness or (after clean)
poor contact
between CS-2 (2)CN-5(60)- DO-1 (1)

Voltage : 20~30V

Starting switch : ON

2

CN-5

Remedy

Voltage : 20~30V

YES Check voltage
between CS-2
(2) and chassis

CS-2

B

ENGINE ECM

YES

ST C

BR ACC

1

0, I

2

4
3
2
1

4

H

H0 I

4

13
14
15

START KEY SW

KEY IG

CN-125

CN-3

39

1

·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted, master
switch ON and check open circuit of fusible link (CN-60).
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

BATTERY

BATT RY
DO-1
2
1

Charge or replace
(after clean)

DIODE
CN-52

YES

ⓐ

Check voltage
between CS-74
(2)- chassis

Defective master
switch

Replace

15

MCU
CR-5
1 5 4

NO
Voltage : 20~30V

ANTI-RESTART RY

Disconnection in Charge or replace
wiring harness or (after clean)
poor contact
between CS-74 (2)
-CR-1

1
2
3
4

2 3

5

ANTI-RESTART RY

START MOTOR

CN-2
7
8

CR-23
2
1

START RY

CN-45

17W96ES13

6-37


14. WHEN STARTING SWITCH IS TURNED ON, WIPER MOTOR DOES NOT OPERATE
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and the fuse
No. 6, 17 and 18 is not blown out.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

CN-21
3

Cause
NO

Defective wiper
cut switch

Remedy

2

Replace

Front sliding door
open-close

YES
NO Check voltage
between CN-97
(7) and chassis

Front sliding door-close
Voltage : 4~5V

Check operation
YES of multifunction
SW
Starting switch : ON
Turn wiper switch

Check voltage between
CN-5 (23) and chassis

YES

ⓐ

NO

Check voltage CN-98
(5) and chassis
Sarting switch : ON
Voltage : 0~1V

Check operation
of wiper motor
and controller
check voltage
YES CN-141 (7) and
chassis, CN-21
(4) and chassis
Starting switch : OFF
Voltage : 20~30V

Check continuity
NO
between
CN-141 (2)-CN-98 (3),
CN-141 (9)-CN-97 (10),
CN-141 (10)-CN-98 (5),
CN-141 (5)-Chassis ,
Check wiper
CN-141 (1)-CN-21 (5),

motor resistance
CN-141 (3)-CN-21 (6),
YES between CN-21
CN-141 (4)-CN-21 (2),
(2)-CN-21 (6)
CN-141 (13)-CN-21 (3)
Resistance : 3~4Ω

NO

Check voltage
CN-141 (6) and
YES chassis
Starting switch : ON
Voltage : 20~30V

Defective
multifunction
switch

YES

YES

4

4

CN-5

M

2

6

FUSE
18

NO.6

CN-141

Replace

Replace

FEED BACK

1

MOTOR DRIVE SIG

2

MOTOR DRIVE-

3

1

MOTOR DRIVE+

4

2

GND

5

3

VCC

6

4

CONTINUE 24V

7

5

WASHER P/P

8

6

WASHER SIG.

9

7

INT. SIG

10

8

WIPER CUT SW

11

N.C

12

FEED BACK

13

WIPER MOTOR CONTROLLER

CN-17

FUSE

24

NO.18
CN-22
M
2
1

19

WASHER PUMP
CN-98
43

(2) INT

1
2
3
4

5

Replace

(1) COM
(4) HO

7 WA

CS-53

1

Repair or replace
(after clean)

Hi

8 COM

23

4
3

WIPER CUT SW
CN-97

1) Recheck fuse Replace
No.18
2) Disconnection Repair or replace
CN-141(6)-Fuse (after clean)

37

10
7

1

2
3
4
5
6
7
8
9
10
11
12

6

WI

2

Lo

4 COM
5

Lo

3

Hi

12 B+

9

L

10 COM

ⓑ

11

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
NO

3

WIPER MOTOR

1)Recheck fuse Replace
No.17
2)Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between
CN-97(7)-Fuse
Defective
multifunction
switch
1) Recheck fuse

No.6
2) Disconnection
in wiring harness
or poor contact
between
CN-141(7)-Fuse,
CN-21(4)-Fuse

Check voltage CN-97
(10) and chassis
Washing

ⓑ

Starting switch : ON
Vottage : 20~30V

NO

NO

Intermittent

ⓐ

6

Repair or replace
Short circuit in
wiring harness or (after clean)

poor contact
between CN-141
(11)- CS-53

Check valtage
between CN-141
YES (11) and chassis

5

5

NO

Check operation
wiper cut switch

1

Defective wiper
motor

Replace

Defective wiper
motor controller

Replace

R

MULTIFUNCTION SWITCH-LH

FUSE
NO.17

14W96ES14

6-38


15. WHEN STARTING SWITCH IS TURNED ON, HEAD LAMP DOES NOT LIGHTS UP
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No.17.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

FUSE
CN-151

NO.17

Cause
YES

Check voltage
YES between CL-4(2)
and chassis,CL3(2) and chassis
Voltage : 20~30V

NO

YES

Check voltage
between CN-98
NO
(2) and chassis
Starting switch : ON
NO
Head lamp switch : ON
Voltage : 20~30V

Check voltage
between CN-152
(14) and chassis,
CN-152 (15) and
chassis

INT (2)
COM (1)

Replace

HO (4)

1
2
3
4

CN-97

Check voltage
YES
between CN-151
(8) and chassis
Starting switch : ON
Head lamp switch : ON
Voltage : 20~30V

Defective bulb

Remedy

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-151
(8)-CL-4 (1) or
CN-151(8)-CL-3(2)

WA

7

Hi

1

Disconnection in
wiring harness or
poor contact
between CN-98
(2)-CN-151 (9)

YES

Lo

Replace

Lo

Repair or replace
(after clean)

6
2

5

Hi

3

B+

12

L

9

1
2
3
4
5
6
7
8
9
10
11
12

CN-98
1
2

COM 10
R

Check voltage
between CN-5
NO (49) and chassis

Disconnection in
wiring harness or

poor contact
between CN-152
(14) and chassis or
CN-152 (15)chassis
Recheck fuse
No. 17

Replace

Defective switch
panel

Replace

CABIN LAMP RY
WORK LAMP RY(COIL)
WORK LAMP RY
WORK LAMP RY
RELAY EARTH
HEAD LMP RY HI
HEAD LMP RY HI(COIL)
HEAD LMP RY LO
NC
OUTRINGER RY

HARNESS RY
1
2
3
4

5
6
7
8
9
10
11
12
13
14
15

FUEL HEAT RY(COIL)
FUEL HEAT RY
HEAD LMP RY LO(COIL)
HEAD LMP RY(COIL)
REAR LH RY
REAR RH RY
FRONT LH RY
FUEL HEAT RY
FRONT RH RY
REAR LH RY(COIL)
REAR RH RY(COIL)
FRONT LH RY(COIL)
FRONT RH RY(COIL)
HEAD LMP RY
HEAD LMP POWER RY

HARNESS RY

11

MULTIFUNCTION SW-LH

Repair or replace
(after clean)

CABIN LAMP RY

CN-152
WI

CN-5

ILL
HEAD LAMP
WORK LAMP
CABIN LAMP
PRE-HEAT
Front/ Left
Front/ Right
Rear/ Left
Rear/ Right
POWER
GND
DOZER PS

1
2
3

4
5
6
7
8
9
10
11
12

CL-4
1 Lo
2 Hi

CN-116

Starting switch : ON
Voltage : 20~30V
Head lamp switch : ON

CABIN LAMP RY(COIL)

12

COM 8

COM 4

Defective
multifunction

switch

7

1
2
3
4
5
6
7
8
9
10
11
12

3

49

E

HEAD LAMP-RH
CL-3
1 Lo
2 Hi
3

E

HEAD LAMP-LH

SWITCH PANEL

Starting switch : ON
Voltage : 20~30V
Head lamp switch : ON

YES

Check voltage
between CN-116
NO
(2) and chassis
Starting switch : ON
Head lamp switch :
ON-OFF

NO

14W96ES15

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-5(49)
and CN-116(2)

6-39

16. WHEN STARTING SWITCH IS TURNED ON, WORK LAMP DOES NOT LIGHTS UP
·Before disconnecting the connector, always turn the starting switch OFF.
·Before carrying out below procedure, check all the related connectors are properly inserted and
short of fuse No.15.
·After checking, insert the disconnected connectors again immediately unless otherwise specified.

Cause
YES
YES

Defective bulb

Remedy
Replace

Check voltage
between CL-5 (2)
and chassis

FUSE
NO.15
NO

YES Check voltage
between CN-151
(5) and chassis
Starting switch : ON
Work lamp switch : ON

Voltage : 20~30V

Check voltage
between CN-151
(6) and chassis,
CN-151(4) chassis

YES

Check voltage
between CN-116
NO
(3) and chassis
Starting switch : ON
Work lamp switch : ON NO
Voltage : 20~30V

Starting switch : ON
Voltage : 20~30V

NO

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-151
(5)-CL-5 (2)

Defective switch
panel

CN-5
CN-151

CN-116

Replace

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-151
(5)-CN-116 (3)

ILL

1

HEAD LAMP

2

WORK LAMP

3

CABIN LAMP

4

PRE-HEAT

5

Front/ Left

6

Front/ Right

7

Rear/ Left

8

50

CABIN LAMP RY(COIL)
CABIN LAMP RY
CABIN LAMP RY
WORK LAMP RY(COIL)
WORK LAMP RY
WORK LAMP RY
RELAY EARTH
HEAD LMP RY HI
HEAD LMP RY HI(COIL)
HEAD LMP RY LO
NC
OUTRINGER RY

HARNESS RY

CN-12

CL-5

9

2

1

POWER

10

1

2

GND

11

DOZER PS

12

Rear/ Right

WORK LAMP

SWITCH PANEL

Disconnection in Repair or replace
wiring harness or (after clean)
poor contact
between CN-151
(6) and chassis or
CN-151 (4) and
chassis
Recheck fuse
No.15

1
2
3
4
5
6
7
8
9
10
11
12

1
2

CL-6

Replace

14W96ES16

6-40