5 8 1. Reference, cable has permanent connection to wiring diagram SCH12 2. Connector wih pin marking.(Connector IM04, pin 1) 3. Component (SW : switch, 3 : function group, 501 : running number) 4. Wire color(GN : green) 5. Wire number(not printed on the wire) 6. Voltage supply 7. Connection mark 8. Frame ground point 9. Diagram number
Electric Wire(1)
Stripe Color
Base Color
Y
= Yellow
Y/W
= Yellow/White
GN
= Green
GN/R
= Green/Red
BL
= Blue
BN/W
= Brown/White
GR
= Gray
BL/W
= Blue/White
W
= White
GN/W
= Green/White
BN
= Brown
BL/Y
= Blue/Yellow
OR
= Orange
BL/R
= Blue/Red
VO
= Violet
P
= Pink
SB
= Black
Conductor (Copper wires)
Base Color / Stripe Color
Electric Wire(2) BL/Y
R / L B
GN/Y
R / L B
GN/Y
Electric Wire(3)
Low Resistance
High Resistance
Low Resistance
High Resistance
P(power consumed at wire) = I Heat(generated at wire)
2
R
Power(consumed at wire)
Thick and Short wire can transmit More Current without heating
Volvo Construction Equipment Korea Ltd.
EC140B-03-04
Connector General
MA51.1 Connector Number
MA51. 2
MA51.2
Abb.
Description
Abb.
Description
MA
Main wire harness
ME
MA to EN connection
EN
Engine wire hareness
MR
MA to RH connection
RH
Right hand side wire hareness
ML
MA to LH connection
LH
Left hand side wire hareness
MI
MA to IN connection
IN
Instrument wire hareness
MC
MA to CA connection
CA
Cabin wire hareness
MS
MA to SW connection
SW
Switch wire harenss
EM
MA to EL connection
EL
Electric box wir harness
MAE
Main wire harness ground
ENE
Engine wire harness ground
Volvo Construction Equipment Korea Ltd.
EC140B-03-05
Connector Pin Number
Connector Handling Remove Clamp
Volvo Construction Equipment Korea Ltd.
Press Lock and Pull out
EC140B-03-06
Align Arrows and Push In
Connector View(1)
Volvo Construction Equipment Korea Ltd.
EC140B-03-07
Connector View(2)
Volvo Construction Equipment Korea Ltd.
EC140B-03-08
Resistance Measurement(1) 1. Plug in multi-meter terminals to correct position.
3. Contact the terminals and set zero ohm point (if adjusting screw is installed).
V.Hz.
mA
20A
0
COM
2. Set multi-meter to the lowest
4. Disconnect component from circuit.
resistance range. DC
V mA
AC
200m
20 200
2
20020
200m
V mA
2
200 20A
200 20A
20M 2M
200 20
200K 20K
o
C
2K
OHM Volvo Construction Equipment Korea Ltd.
2000p 20 200n
200
KHz TEMP
Farad EC140B-03-09
Resistance Measurement(2) 5. Contact the terminals to measuring points. Do not touch the terminals or measuring points with finger or any conductive material.
6. If resistance is too large to measure, increase measuring range step by step. DC
V mA
1
200m
20 200
2
V mA
200m 2
200 20A
20M 2M
200 20
OHM
EC140B-03-10
20020
200 20A
200K 20K
Volvo Construction Equipment Korea Ltd.
AC
o
2K
2000p 20 200n
200
C
KHz TEMP
Farad
DC Voltage Measurement(1) 1. Plug in multi-meter terminals to
3. Leave component at connected condition.
correct position. V.Hz.
mA
20A
COM
2. Set multi-meter to the highest DC voltage range. DC
V mA
terminal and component terminal. AC
200m
20 200
2
20020
V mA
200m 2
200 20A
200 20A
20M 2M
200 20
200K 20K
4. Check and match polarity of multi-meter
o
2K
OHM Volvo Construction Equipment Korea Ltd.
2000p 20 200n
200
C
KHz TEMP
Farad EC140B-03-11
DC Voltage Measurement(2) 5. Contact the terminals to measuring points. Do not touch the terminals or measuring points with finger or any conductive material.
6. If voltage is too small to measure, decrease measuring range step by step. DC
V mA
0.001
200m
20 200
2
V mA
200m 2
200 20A
20M 2M
200 20
OHM
EC140B-03-12
20020
200 20A
200K 20K
Volvo Construction Equipment Korea Ltd.
AC
o
2K
2000p 20 200n
200
C
KHz TEMP
Farad
DC Current Measurement(1) 1. Plug in multi-meter terminals to
3. Disconnect one wire to the component.
correct position. (Plug in plus terminal to Max. current position) V.Hz.
mA
20A
COM
4. Check and match polarity of multi-meter 2. Set multi-meter to same current
terminal and component terminal.
range. DC
V mA
AC
200m
20 200
2
20020
V mA
200m 2
200 20A
200 20A
20M 2M
200 20
200K 20K
o
C
2K
OHM Volvo Construction Equipment Korea Ltd.
2000p 20 200n
200
KHz TEMP
Farad
EC140B-03-13
DC Current Measurement(2) 5. Contact the terminals to measuring points. Do not touch the terminals or measuring points with finger or any conductive material. Current flow
6. If current is too small to measure, decrease measuring range step by step. DC
V
0.01
V.Hz.
mA
mA
200m
20 200
2
20A
COM
V mA
200m 2
200 20A
20M 2M
200 20
OHM
EC140B-03-14
20020
200 20A
200K 20K
Volvo Construction Equipment Korea Ltd.
AC
o
C
2K
2000p 20 200n
200
KHz TEMP
Farad
Diode Check Procedure(1) 1. Plug in multi-meter terminals to ohm measuring position.
3. Contact the terminals and check zero ohm point. (Check if multi-meter is normal)
V.Hz.
mA
20A
0
COM
2. Set multi-meter to 20K or similar
4. Disconnect diode from circuit.
ohm range. DC
V mA
AC
200m
20 200
2
20020
200m
V mA
2
200 20A
200 20A
20M 2M
200 20
200K 20K
o
2K
2000p 20 200n
200
OHM Volvo Construction Equipment Korea Ltd.
C
KHz TEMP
Farad EC140B-03-15
Diode Check Procedure(2) 5. Contact red terminal to triangle side pin and black terminal to bar side pin. Check if some kilo ohm value is displayed. (This value can be different according to measuring condition )
5.6 6. Contact red terminal to bar side pin and black terminal to triangle side pin. Check if above measurable value is displayed.
