“Familiarization on YUTONG
Chassis Electrical System”
Common Electrical Problems
• Engine won’t start / Power
black-out
• Alternator not charging
• Retarder malfunction
• Door won’t close
• Wiper continuous
ENGINE WON’T START
BATTERY CUT-OFF SWITCH
• The switch should be at “on”
position
Location - at the battery
compartment
ENGINE WON’T START
ENGINE LID COVER SENSOR
• The lid cover sensor is
defective
Location - at the engine lid
cover
ENGINE WON’T START
ENGINE LID COVER SENSOR
RELAY
• The lid cover sensor relay is
defective
Location - Main panel board
inside dashboard or at left
lid cover
ENGINE WON’T START
BUSTED FUSE / RELAY
• The main fuse / relay
is busted
Location - in the main
fuse box at the
battery compartment
ENGINE WON’T START
NEUTRAL GEAR SWITCH
• The neutral gear switch is
loose or defective
Location - at the
transmission
ENGINE WON’T START
START-PROTECT RELAY
• The start-protect relay
is loose or defective
Location - in the main
fuse box at the battery
compartment
(ZK6107)
- inside the dashboard
(ZK6858)
POWER BLACK-OUT
MAIN RELAY FUSE
• The main relay fuse is
busted
Location - in the main
fuse box at the battery
compartment
POWER BLACK-OUT
MAIN RELAY FUSE
• The main relay fuse is
busted
Location - Main panel
board inside dashboard
or at left lid cover
ALTERNATOR NOT
CHARGING
BUSTED FUSE
• The alternator fuse is
busted
Location - in the
alternator line
RETARDER MALFUNCTION
BUSTED FUSE
• The retarder fuse is
busted
Location - Main panel
board inside dashboard
or at left lid cover
RETARDER MALFUNCTION
BUSTED FUSE / RELAY
• Retarder Relay
Location - Main panel
board inside dashboard
or at left lid cover
RETARDER MALFUNCTION
RETARDER LEVEL
MALFUNCTION
(1,2,3,4)
• Retarder Fuse Link
Location - in the
retarder fuse box at
the battery
compartment
RETARDER MALFUNCTION
AUTOMATIC RETARDER
MALFUNCTION
• Speedometer Sensor
Location – at the
transmission
RETARDER MALFUNCTION
AUTOMATIC RETARDER
MALFUNCTION
• Pressure Switch
Location – at the
baggage compartment
beneath the flooring
RETARDER MALFUNCTION
AUTOMATIC RETARDER
MALFUNCTION
• Electronic Speed Switch
Location – Main panel
board inside dashboard
or at left lid cover
DOOR WON’T CLOSE
ANTI-PINCH BEARING
• The bearing is stuck
Location – at the
pneumatic door
mechanism
DOOR WON’T CLOSE
REMOTE CONTROL
SENSOR
• The sensor is defective
Location – inside
dashboard or at left lid
cover
(Note: for some models, remote
control will not function if the
ignition key is at “ on”
position)
WIPER CONTINUOUS
BUSTED RELAY
• Intermittent Relay
Location - Main panel
board inside dashboard
or at left lid cover
THANK YOU
TELMA RETARDER SYSTEM
Brake lining life is extended because
the Telma Retarder absorbs 85% of the
braking force needed, only the
remaining 15% is absorbed by the
brake system itself.
Instrument Panel
2
1. Metro ng bilis o
Speedometer 1
2. Metro ng ikot ng
makina o
Tachometer
3. Metro ng temperatura
ng tubig o Coolant
temperature gage
4. Metro ng pressure ng
hangin o Air
pressure gage
3
5. Metro ng dami ng
krudo o Fuel gage
7
6. Metro ng pwersa ng
langis sa loob ng
makina o Oil
pressure gage
4
7. Metro ng boltahe o 6
voltmeter
5
COOLANT TEMPERATURE GAGE
• Ang coolant temperature
gage ay ang aparatong
sumusukat ng init ng
coolant na umiikot sa
loob ng makina
• Dito makikita kung ang
makina ay nakakaranas
ng overheating o labis
na init ng makina.
Normal Operating Temperature: 82-95 degrees Celsius
AIR PRESSURE GAGE
• Ang air pressure gage ay
ang aparatong sumusukat
ng dami at lakas ng hangin
na nasa loob ng air tank. Ito
ay isa sa mga
mahahalagang aparato sa
instrument panel sapagkat
ang YUTONG ZK6100 bus ay
full air brake system at
umaasa lamang sa hangin
na nasa loob ng air tank.
• Kung ang hangin sa loob ng
air tank ay bumaba sa
minimum operating
pressure,magiging
mapanganib na para
patakbuhin pa ang bus.
Normal Operating pressure: 6.5 – 8.5 kg/cm2
FUEL GAGE
• Isa sa mga aparatong
makikita sa instrument
panel ay fuel gage.
• Ito ang sumusukat ng
dami ng diesel fuel sa
loob ng fuel tank
• Kapag nasaid ang laman
ng tangke magkakaroon
ng air lock sanhi upang
mahirapang paandarin
ang makina kahit na
makargahan pa ito ng
fuel Fuel tank capacity: 300 liters
ZK6100 w/ Direct Drive A/C:
FUEL CONSUMPTION: 3.0 - 3.2 km/L (Provincial)
(*also depends on driver’s driving habits)
WARNING LAMPS at
INDICATOR LAMPS
• Ang YUTONG
ZK6100 ay
gumagamit din ng
mga warning Oil Air Overheat Coolant
buzzers at warning
pressure pressure level
lamps na syang
nagbibigay babala
kapag may
nakaambang Stop operation Charge Low fuel
panganib sa loob at
labas ng makina.
Ito ay ang mga
sususunod:
Parking Air dryer Door open Retarder
Babala sa kakulangan ng tubig:
Kapag umilaw ang babala para sa
kakulangan ng tubig, mabuting
itabi ang bus at dagdagan ng
tubig. Mawawala ang babala
kapag nasa tama ang dami ng
tubig. Kapag hindi nawala ang
babala pagkapuno ng tubig,
maaring sira na ang coolant level
warning switch. Ikonsulta ito sa
mekaniko o elektrisyan.
COOLANT LEVEL
Babala sa mababang “PRESSURE “
ng langis:
Ang LANGIS ang isa sa
pinakamahalagang bagay na dapat
bantayan sa makina. Ito’y
maihahalintulad sa dugo ng tao na
dapat may tamang pressure.
Kapag ito ay mababa, hindi
makaka-supply ng tamang dami ng
langis sa ibat-ibang parte ng
makina at masisira ito.
Ang babala sa mababang pressure
ng langis ay gagana kung ito ay
bababa sa 10 PSI kapag idling at
30 PSI kapag nakarebolusyon
Kapag ang babala ay nakataas,
makabuting itigil na lang ito at OIL PRESSURE
ipasuri sa mekaniko.
CONTROLS AND SWITCHES Instrument cluster
Switches Door / Side view
mirror switch
Wiper / Turn
signal switch
Retarder switch
Parking brake switch
RETARDER SWITCH
WIPER, TURN SIGNAL AND PASSING BEAM SWITCH
CONTROLS AND SWITCHES Instrument cluster
Switches Door / Side view
mirror switch
Wiper / Turn
signal switch
Retarder switch
Parking brake switch
SWITCHES
Windshield Destination
Battery Relay blower lamp Plate lamp
Park light / Reading lamp Fog light
Head light
SWITCHES
Automatic
Room lamp ABS tester Hazard light Retarder
Driver’s Horn option Television Engine
lamp stop
SWITCHES
Side mirror Door switch
heater
