2-9 c. Check levels of braking fluid, engine coolant, engine oil, transmission oil, power steering fluid, and
washing fluid to see if there is any leaking.
d. Inspect if brake pedal, clutch pedal, accelerator pedal, transmission shifter, steering wheel, choke are
loose or stuck. The free travel of clutch pedal is 5~15mm, the free travel of brake pedal is 1~6mm and
the free play of steering wheel is less than 30mm(measurement point at margin of steering wheel). if it
is out of this normal range, the clutch needs to be tuned.
e. Inspect if the connection of battery, lamps and signal lights are normal, and if the wire routing and
position are correct and not loose.
f. Inspect if the tire pressure is correct.
(2) On-road inspection If the inspection result of the above items is good, start the engine and test the car on
road, and perform the following inspections.
a. Acceleration pedal, see if the operation is smooth and if it is loose.
b. Clutch, see if there is any stuck or abnormal noise, and slip when driving.
c. Transmission,check if shifting is smooth,or rough and wrong shifting.Inspect if the display of A/T
shift lever is normal.
d. Steering, check if steering is light and smooth, and if the steering wheel turns back after steering.
e. Brake pedal, apply brake pedal to check if the braking functions well when vehicle speed is at
40km/h and if the vehicle runs off track.
f. Park brake, when parking brake handler is pulled, there should be 6~9 clicking sounds. Pull park brake
when vehicle is running at the speed of 20km/h and transmission is at neutral gear to see if it brakes.
g. Vehicle speed meter, observe the vehicle speed meter while driving. When speed changes, check if the
indicator is moving steadily or shakes.
h. Heating and air-conditioning.Try every control button to see if both heating and cooling system work
well.
i. Abnormal noise, listen carefully to see if there is any abnormal noise from engine, drive line system or
any other parts of the vehicle at a steady speed and during accelerating, and decelerating.
(3) Inspection after test ride check if there is anything abnormal in the vehicle while driving and conduct the
following inspections after the vehicle is parked.
a. Check electrical fan When engine coolant temperature is beyond 92.5°C, the radiator fan should be
running; When A/C is on and the pressure of refrigerant is more than 1.5 cooling ton, air conditioning
cooling fan should be running.
b. Check headlamp, method: park the car 5m away from the inspection surface (inspection board, curtain,
or wall) to the front bumper, and check if the beam from headlamp is good. The upper level if headlamp
should be 540mm above the ground, and the distance between headlamps on the two sides is 900mm.
c. Inspect engine idle speed,idle speed of hot engine is 800r/min±50r/min,when A/C compressor works,
the idle speed should be 900r/min±50r/min. If idle speed is abnormal, adjust the idle speed adjust
ment screw to adjust it.
(4) Usage of new cars in breaking-in period Follow the instructions below in the first 1500~2500km breaking
mileage to avoid wear and abnormal damage in breaking-in period, and to improve vehicle performance, fuel
economy and to extend vehicle useful life.
a. Drive steadily during breaking-in; do not accelerate harshly to avoid running engine at high speed.
Engine should not exceed 4500r/min in any gears. Especially at the early stage of breaking-in, vehicleUsage and Maintenance of MK Series - Usage of MK Series
c.Check voltage between terminals
Standard:Rotating wheel 7.5-9V
Below 0.5V0Voltage changes alternativelyCombination Instrument System -Malfunction Symptom Table and Troubleshooting5-11 Result and measures:
Normal, replace combination instrument assy.
Abnormal, repair or replace wiring harness or connector
2. Speedometer fails
Check
(1) Check combination instrument assy.
a. Remove combination instrument assy. , keep connection of connector.
b. Check on state
Check connection between terminals
Standard:Tester connection Conditions Standard condition
C 17- ground Turn ignition switch to ON position 7. 5-9V
Result and measures:
Abnormal, go to (2) Check combination instrument assy. speed input signal
Normal, go to (3) Check combination instrument assy.
(2) Check combination instrument assy. speed input signal
a. Check voltage
Prop up two front wheels
Push transmission lever to neutral position
Turn on ignition switch
turn front wheel slowly, measure the voltage between terminal C15 and terminal C16
Standard voltage is shown in the figure below:
Result and measures:
Normal, replace combination instrument assy.
Abnormal, check speed sensorTester connection Condition Standard condition
C 15-ground Normal ON
Check voltage between terminals
Standard:7.5-9V
0Voltage changes alternatively5-12 b. Check speed sensor
Check on state
Check connection between terminals
Standard:Tester connection Conditions Standard condition
3- ground Turn ignition switch to ON position 7. 5-9VTester connection Condition Standard condition
2- ground Normal ON Result and measures:
Abnormal, repair or replace wiring harness or connector
Normal, check speed sensor output signal
c. Check speed sensor output signal
Check voltage
Prop up two front wheels
Push transmission lever to neutral position
Turn on ignition switch
Turn front wheel slowly, measure the voltage between terminal 1 and terminal 2
Standard voltage is shown in the figure below:
Rotating wheel Below 0.5V
Result and measures:
Normal, repair or replace wiring harness or connector
Abnormal, replace speed sensor
(3) Check combination instrument assy.
a. Remove combination instrument assy. , disconnect connector.
b. Check on status
Check connection between terminals
Standard:
Tester connection Condition Standard condition
C 13- ground Normal ONCombination Instrument System -Malfunction Symptom Table and Troubleshooting
III. Wiper switch assemblyReplacement
1. Detach steering wheel assembly
(1) Disconnect the main power source of the vehicle.
(2) Remove the passenger SRS module assembly, and cautiously put it in a safe place.
(3) Loosen steering wheel lock-bolts and remove the assembly.
2. Remove wiper switch (1) Disconnect the connector.
(2) Remove the 2 tapping screws that are for mounting the wiper switch, take out the wiper switch from the
bracket of the combination switch.IV. Washer nozzleAdjustment
1. Inspect washer nozzle
(1) Start the engine, check if the position where the washer fluid from the nozzle sprays the windshield is in
the upper center wiped by the blades.
(2) Change the height (left/right) of the nozzle hole to adjust the point where washer fluid sprays the windshield.Wiper and Washer System -Replacement and Adjustment5-25
Notes:
If noise occurred does not belong to any of the above-mentioned situations, please find out the cause according
to "receiving problem".
5. CD phonograph
CD phonograph (hereafter referred to as CD) uses laser beam to read digital signals recorded on CD, then revert
to analog signal of music.
Notes:
Don't attempt to break down or apply oil to any component of the phonograph. Do not insert anything other
than a CD into optical disk cartridge.
Notes:
CD phonograph uses invisible laser beam, could generate harmful radialization, always operate phonograph
according to instructions.
6. Maintenance
(1) Cleaning of magnetic tape phonograph, magnetic head:
a. Open tape cartridge gate with your finger, use a pencil or a similar article to insert guider.
b. use cleaning pen or cotton swabs with detergent to wipe magnetic head surface, idler wheel or guide
pulley.
(2) CD phonograph, CD cleaning:
If CD is dirty, use soft cloth to wipe the surface from CD center radially outwards.
Notes:
Don't use ordinary recorder detergent or antistatic protectant. 4. Noise problem
Detailed description of noise problem fed back by customers is of great importance for analyzing and
eliminating noise interference, the table below may be used for diagnosis.Audio System -Audio System Description5-39Noise condition
Noise occurs in special position
Noise occurs when receiving small
signal
Noise only occurs at night
Noise occurs in special position
during driving Radio wave
AM
FMCause
Most probably external noise
Broadcast from local station might broadcast the same
program. If program is the same, one of them might be
disturbed
Most probably from remote interference
Most probably is multiplex interference due to FM
frequency changeExample:
Magnetic head
Guide pulley
Idler wheel
(f). Flatten the edge with hammer or sizing block, and remove the burr with file to make sure that it is aligned
with the both side alternative plates with a clearance not more than 1mm;
(g). Replace the plate, and clamp it with pincers. Carry out the spot welding along the seam at a space of
approximately 50mm;
(h). Make the welding from the center to both sides alternately block by block. Which can reduce the
deformation;
(i). Strike the welding line with the hammer or sizing block to remove the retaining stress. Polish the welding
lien wit the file or manual grinding wheel to make it even and smooth for the painting.
c. Repair for Accidented Damage
(a). Plate work flattening
When the accidented damage occurs on the plate work of the body, it can be repaired by means of beating.
In the repair process, start from Point C as shown in Fig. 5-26. Put the sizing block on the convex point, and beat
it with the hammer and change the block's position correspondingly. When the convex point is flattened, the
concaved part in Point B will rise. Similar wit the original profile of the plate, for the remaining dent, a sizing block
with the same radian can be employed. Press the bottom of the plate with hand, and beat the high point of the dent
with the hammer. (Fig. 5-27)Fig. 5-27 Plate Work Flattening (II)
A. Hammer B. Plate work
C. Sizing block Fig. 5-26 Plate Work Flattening (I)
A. Impact point B. Concaved point after impact
C. Convex point after impactFig. 5-28 Heating & Planishing
Convex Point
1. Heating pointBody Repair -Repair After Body Damage7-19 In the beating process, beat the work piece heavily at the beginning and lightly at the end. Attention shall
be paid to reduce the number of beating as possible as it can. Don't beat the same points repeatedly to prevent the
metal plate extending locally, which can complicate the repair work.
For the larger arc concave, a sizing block can be used under the center of the concave. The area of the sizing
block shall be a little larger. Jack the concaved plate up with a supporting tool. Sometime, heat the concaved part
to wine color to reduce the force. When jacking the plate up, a little excess is acceptable. (Fig. 5-28)
(b) Thermal contraction
When the concave is jacked up, if the plate extends seriously and the area is large, the thermal contraction
method can be used in case that the traditional methods don't work. (Fig. 5-29)
Heat the work piece to cerise color with oxyacetylene flame. The heating scope depends on the degree of extension.
If the extension is serious or the area is large, the heating point shall be larger relatively (diameter: approx.20-
30mm). If the extension is not serious or the area is small, the heating point shall be a little smaller (diameter:
approx.10-15mm). After the heating, beat the heating point immediately. In the beating process, a proper sizing
block is used under the plate. After it is cooled down, beat it lightly with the hammer.
The contraction starts from the highest point to the center, and then to the edge. Heat and flatten the extended
part repeatedly till the plate is flattened fully. If the convex part is too high, compress it to one half of the original
height. After it is cooled down, heat it at the original heating point till the other half of convex part is removed.