General Information - Repair Instruction1-93. Electronic Control Device
(1) Removal of the battery terminal cable
a. Before performing electrical servicing, disconnect the nega-
tive (-) cable from the battery in order to avoid short for burnout.
b. When disconnecting the terminal cable, turn off the ignition
and light switches, loosen the cable nut and raise the cable straight
up without twisting or prying it.
c. When disconnecting the terminal cable from the battery, all
information stored in the clock, radio and DTC shall be deleted,
therefore, these information shall be checked before disconnection.
(2) Processing of Electronic Parts
a. Do not open the cover or case of the ECU unless absolutely
necessary. (If the IC terminals are touched, the IC may be destroyed
by static electricity.)
b. To pull apart electrical connectors, pull on the connector itself,
not the wires.
c. Be careful not to drop electrical components, such as ECU
or relays. If they are dropped on a hard floor, they should be replaced
and not reused.
d. When steam cleaning an engine, protect the electronic
components, air filter and emission-related components from water.
e. Never use an impact wrench to remove or install tempera-
ture switches or temperature sensors.
f. When checking continuity at the wire connector, insert the
tester probe carefully to prevent terminals from bending.
4. Remove and Installation of Engine Intake Parts
(1) If any metal scrap is mixed in the inlet pass, that may give
a bad effect to the engine.
(2) When removing and installing of the inlet system parts, close (6) Airbag ECU
a. Never reuse the airbag ECU involved in a collision when the SRS has deployed.
b. The connectors to the airbag sensor assembly should be connected or disconnected with the airbag ECU
mounted on the floor. If the connectors are connected or disconnected while the airbag ECU is not mounted to
the floor, it could cause undesired inflation of the supplemental restraint system.
c. Work must be started after 60 seconds from the time the ignition switch is turned to the "LOCK" position
and the negative (-) terminal cable is disconnected from the battery, even if only loosing the set bolts of the
airbag ECU.
(7) Wire Harness and Connector
The SRS wire harness is integrated with the instrument panel wire harness assembly. All the connectors in
the system are a standard yellow color. If the SRS wire harness becomes disconnected or the connector becomes
broken due to an accident, etc., repair or replace it.Negative(-)
Cable
Wrong
2-11a. Keep air filter clean, Block of air filter affects engine air induction efficiency and increases fuel
consumption. So it must be cleaned and replaced in time.
b. Keep ignition system under good work condition. Bad connection or electricity leak of ignition coil and
power distributor or inappropriate gap or carbon residue of spark plug decreases ignition power supply
and efficiency, which leads to engine fuel consumption increase. So they need regular inspection and
repair to keep their good work condition.
c. Fuel feeding system works well. Often check if fuel feeder pipe leaks, and check if injectors and other
parts perform well on regular basis (electrical injection engines).
d. Keep regular tire pressure. If the tire pressure is not enough, vehicle rolling resistance increases and
engine fuel consumption increases accordingly. So tire pressure must be checked on time (around once
a week).Usage and Maintenance of MK Series - Usage of MK Series
2-12Section 2 Maintenance Category and Content of MK SedanAs the vehicle is being used, its technical performance changes as the mileage accumulates and being affected by
various factors, which results in decrease of power, fuel economy, safety, and increase of emission pollutions,
noise and incidents. So timely maintenance during vehicle usage eliminates potential risks and prevents incidents
from happening, improves vehicle integrity and technical functionality, and prolongs useful life of the vehicle.
According to the vehicle technical requirements and usage history, maintenance of freedom Cruiser sedan can be
classified into several categories.I. first time maintenanceFirst time maintenance is also called breaking-in maintenance. It is performed when the vehicle mileage has
accumulated to 1500~2500km in breaking-in period. First time maintenance must be conducted at the appointed
service shops. It includes:
1. Check if there is any leak in engine, transmission, and differential. Fix if there is any.
2. Replace engine oil filter, engine oil and ATF for A/T.
3. Check the level of engine coolant, braking fluid, windshield washing fluid, power steering fluid and if there
is any leak. Refill if the level is too low and repair if there is any leak.
4. Check if there is any damage in triangle arm and ball joint, connection ball joint, triangle arm flexible hinge,
or the ball joint is loose. If there is, fix or replace it.
5. Check if the drive shaft dust cover is damaged. If there is, replace it.
6. Check if there is any leak in steering mechanism, or front and rear absorber and fix it there is any.
7. Check the tire pressure, front 230kpa, and rear 210kpa.II. Regular maintenanceAfter first time maintenance, the vehicle is in regular usage life. During regular use, the vehicle needs to be
maintained regularly according to the way it is used in.
1.Regular maintenance for vehicles used under extreme bad conditions. Any of the condition below is defined
as extreme bad condition:
(1) Frequent start.
(2) Often drive the vehicle in dusty circumstances.
(3) Drive the vehicle in hot areas (such as in summer in the south).
(4) Often drive in cold areas (often runs short trips, engine temperate cannot reach regular work temperature).
Vehicles ran under extreme bad conditions need to be maintained every 5000km.
2. Regular maintenance for vehicles Vehicles that have not been through extreme bad conditions need to be
maintained every 7500km.
Regular maintenance is required to be performed at Geely service shop, too.
List of parts that need to be replaced regularly is in table 1.
Maintenance timetable is in table2.III. Geely maintenance programGeely recommends following Geely maintenance program.
The intervals of maintenance schedules are determined by mileage meter or time periods. Maintain the vehicle
when either meets the schedule. For details, please refer to the schedule.Usage and Maintenance of MK Series - Maintenance Category and Content of MK Sedan
2-14
V. Table 1 List of parts to be replaced regularlyThe intervals in the part list are for cars driven under normal condition. If the car is driven in special circumstances,
the replacement can be advanced from the schedule above.SystemParts need to be replaced regularly
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22Brake master cylinder cup valve and dust coverBrake master cylinder cup
Brake hose
Brake caliper valve
Brake booster rubber
Brake booster vacuum hose
Brake fluid
MT Transmission oil
AT Transmission oil
Steering fluid
Air Cleaner
Air c leaner f ilter
Lubricant
Oil filter
Fuel filter
Coolant
All hoses
Canister
Timing beltWedge belt (including the power steering pump,
air conditioner compressor and generator belts)PCV system
Spark plugEvery 2 years (or as required)
Every 2 years (or as required)
Every 2 years (or as required)
Every 4 years (or as required)
Every 2 years (or as required)
Every 4 years (or as required)
Every 2 years,or 40000km (or as required)
Every 2 years,or 40000km (or as required)
Every 2 years,or 40000km (or as required)
Every 2 years,or 40000km (or as required)
To be cleaned every 10,000km and changed
every 30,000km (or as required)
First 2500km or 2 months. Every 7500km or
6 months afterward (or as required)
First 2500km or 2 months. Every 7500km or
6 months afterward (or as required)
Every 5000km (or as required)
Every 40000km (or as required)
Every year (or as required)
Every 2 years (or as required)
Every 60000km (or as required)
Every 120000km (or as required)
Every 50000km (or as required)
Every 20000km or 12 months (or as required)
Every 20000km (or as required)Intervals
DrivelineSteering SystemBraking
SystemEngineA/C System
(API) SG or above(Table 1)Usage and Maintenance of MK Series - Maintenance Category and Content of MK Sedan
2-17
VII . Additional maintenance scheduleVehicles run in special circumstances require higher frequency of maintenance as listed below. Replacement of engine oil
Replacement of engine oil filter B-1: repeated short-distance driving and outer air temperature under zero within 8km (kilometer)
Inspection of the brake friction wafer and braking drum
Inspection of the braking pad and braking disc B-2: long-term empty run and / or long-distance driving with low speed, such as police wagon, taxi or automobile delivering
goods to the customers etcEvery 2,500km (kilometer) or every 3 months
Every 5,000km (kilometer) or every 6 months
Every 10,000 km (kilometer) or every 6 months
Every 5,000km (kilometer) or every 3 monthsB-3: continuous high-speed driving for more than 2 hours (80% of the maximum vehicle speed or above)
Replacement of driving axle oil of the manual transmission
Inspection or replacement of the driving axle fluid of the
automatic transmissionEvery 40,000km (kilometer) or every 48 months
Every 40,000km (kilometer) or every 24 months Inspection of the brake friction wafer and braking drum
Inspection of the braking pad and braking disc
Inspection of the brake piping and hose
Inspection of the transmit shaft ball and joint and dust shield
Inspection of the drive shaft cover
Inspection of the steering wheel, connecting rod and steering gear
box oil
Inspection of the front and rear suspension devices
Screwing down the bolts and nuts of the chassis and vehicle body A-1: driving on bumpy, muddy or melted snow road.
Replacement of engine oil
Replacement of engine oil filter
Inspection and replacement of air filter
Inspection of the brake friction wafer and braking drum
Inspection of the braking pad and braking disc
Replacement of the air conditioner filterA-2: driving on dusty roadEvery 10,000 km (kilometer) or every 6 months
Every 5,000km (kilometer) or every 3 months
Driving for 1000 km (kilometer) for the first time and
then every 10,000 km or every 6 months
Every 10,000 km (kilometer) or every 6 months
Every 10,000 km (kilometer) or every 12 months
Every 5,000km (kilometer) or every 3 months
Every 10,000 km (kilometer) or every 6 months
Every 10,000 km (kilometer) or every 6 months
Every 5,000km (kilometer) or every 6 months
Every 5,000km (kilometer) or every 6 months
Every 2,500km (kilometer) or every 3 months
Every 10,000 km (kilometer) or every 6 months
Every 5,000km (kilometer) or every 3 months
Every 10,000km (kilometer)Usage and Maintenance of MK Series - Maintenance Category and Content of MK Sedanoo o
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2-18Section 3 Daily Maintenance of MK SedanDaily maintenance means operation of vehicle regular inspection, cleaning, fastening, and refilling according to
vehicle usage and condition on the basis of regular maintenance to make sure the vehicle is at good status. Daily
maintenance can be performed by driver or professional automotive mechanics in daily use of vehicle. But some
of the items must be conducted by professional mechanics at service shops.
1. Maintenance of air cleaner
Air cleaner filters the air that is coming into engine for the first time. Dust and other dirt filtered out gathers in the
induction tube. Air cleaner filters a lot of dust and dirty, so it must be cleaned in time.
2. Maintenance of air filter
Air filter does not only filter the dust and dirt in the air, but also keeps smooth ventilation. Its status has great effects
on the fuel economy and power of the engine, so it must be checked and maintained in time.
Before it is time to replace air filter, maintain it. Remove the filter, knock it with hand or stick to get rid of dust
on the filter and remove dirt inside the filter cover according to the cleanness of the road that the vehicle usually
runs on.
ATTENTION: do not clean the filter with wet cloth. Fasten the filter well when installing it back.
3. Maintenance of battery
Battery is used to start the vehicle and supply power to electrical facilities. Its status directly affects the regular
usage of the vehicle, especially for vehicles equipped with electrical controlled facilities. Keeping the battery in
good technical status and connections is especially important. It is necessary to often perform the following
inspections and maintenance in regular usage:
(1) Clean the outside of battery Inspect if the battery case or cover surface is dirty or has dirt, oil, or other dirty
things regularly. Clean it and keep the surface dry to avoid electrical leak caused by cover deformation.
(2) Check battery connections Bad connection between battery electrode and cable results in low engine start
speed which makes it difficult to start the vehicle or the vehicle cannot be started because of low output voltage
from battery. Loose connection at battery end leads to damage of electrical components and loss of trouble code
and other information stored in RAM of the computer system as a result of low voltage. Therefore, it is necessary
to check if the connection of cables on the battery electrode is good. When it is found loose, it must be fastened.
If there is any rust, the cables must be loosened, washed clean and be connected again.
4. Maintenance of tires and wheels
(1) Keeping tires and wheels under good condition is very important to vehicle fuel consumption and driving
safety. Therefore, inspect and maintain the tires regularly. Every 10000 km, the wheels should be adjusted. Follow
the sequence in picture 3:
Judge if there is any hidden problems in vehicle chassis mechanism by observing wear in different places, andfinding out the hidden problems does not only help you to understand
the technical status of the vehicle, but also benefits driving safety.
a. Serious wear on both edges of tire tread, means tires often
work with low tire pressure.
b. Wear of middle of the tire tread is mainly because the tires
are used with high tire pressure.This kind of wear shortens
the useful life of tires, and may result in sudden flat tire
when the vehicle runs on uneven road surface or meets any
obstacles.Usage and Maintenance of MK Series - Daily Maintenance of MK Sedan
TableEngine AssemblyEngine Inspection3-2 Note:
Check the belt distortion at the specified point (see Figure 1-1).
When mounting a new belt, set the tensioning force to specified value.
After the belt has been operated more than 5 minutes, check and ensure the distortion not exceeding specified
value. (2) Make sure that the coolant level is above the neck of the radiator.
(3) Put the radiator cover in place, pressurize to 2.0Mpa, and keep the pressure for 1minute unless the coolant
leaks. (Mount a tester on the radiator cover, start the engine, and then shut down under a pressure 2.0Mpa).
(4) Check whether the coolant quantity in the dilatation can is between the mark "Low" and "Full".
(5) Check whether the radiator cover is clean; test whether the opening pressure of the main valve is 107.8KPa
with a radiator cover tester. The minimum opening pressure is 58.5KPa.
6. Check the battery.
(1) The terminal voltage of the battery is 12.5-12.9V at 20°C, and charge when the voltage value is less than
the specified value. Check whether the fusible cutout and the fuse are loose, corrosive or on.
7. Check the air filter.
(1) Whether the cover, the case or the element of the filter is distorted, corroded or damaged.
(2) Whether the air hose is damaged.
(3) Whether the air chamber is distorted or damaged.
(4) Whether the air filter element is blocked, polluted or damaged. If the filter element is blocked slightly,
remove the dirt by blowing the element from above.
(5) Whether there is any pollutant or dirt on the air filter support.
8. Check the spark plug.
(1) Spark generation.
a. Disconnect the coupling of the injector.
b. Remove the spark plug from the secondary wire.
c. Remove the spark plug.
d. Connect the spark plug to the secondary wire.
e. Ground the spark plug.
f. Start the engine, and check whether spark is generated.
Prompt: The starting time is not more than 1-2s.
(2) Clean the spark plug: The air pressure is not greater than 588kp and the time is not more than 20s.
(3) Check whether the thread and the insulator of the spark plug are damaged. Replace if necessary.
(4) Check the electrode gap of the spark plug: 0.8±0.1mm for MR479Q and MR479QA; 1±0.05mm for
MR481QA.
9. Check the driving belt.
Belt distortion (see Table 1):
Belt pressure: 98NMeasure belt loosenessCompressor
Crank Power steering
pumpWater
pump
Alternator2 1
3Figure 1-1New belt mm Used belt mm
Generator drive belt 7~9 11.5-13.5
Power steering belt 5~6 6~8
Air conditioner belt 6.5~7 8~9 -
Table 3Section 2 Removal of the Engine Assembly from the Vehicle1. Avoid petrol overflowing (Disconnect from the fuel tank).
2. Remove the front wheel.Figure 1-5Engine AssemblyRemoval of the Engine Assembly from the Vehicle3-5CO
Normal
Low
HighHC
High
High
HighProblems
Bad idle speed
Bad idle speed
(HC reading fluctuates)
Bad idle speed
(Black smoke exhausts)Causes
1. Ignition fault:
Incorrect ignition timing;
Dirt, short circuit, or incorrect spark plug gap.
2. Incorrect valve gap.
3. Suction and exhaust valve leak.
4. Cylinder leaks.
1. Vacuum leaks.
PCV pipe . manifold;
Idle speed control valve;
Brake booster pipeline.
2. Spark lacks since the mixed gas is too thin.
1. Air filter is blocked.
2. PCV valve is blocked.
3. EFI system fails.
ECU fails.
Pressure regulator of fuel oil is out of order.
Water temperature sensor does not work.
Suction pressure/temperature sensor fails.
Injector fails.
The throttle position sensor fails.3. Discharge the coolant completely.
4. Remove the air filter assembly with hose (see Figure 1-5).
(1) Disconnect the joint of the temperature sensor and the wire
plug.
(2) Disconnect the vent duct from the hose of the air filter.
(3) Release the wire clip bolt on the air filter.
(4) Disconnect the hose of the air filter from the throttle body.
(5) Remove 3 bolts and the air filter assemblies.
5. Remove the battery.
6. Remove the fuel pipe sub-assembly.
7. Disconnect the water pipe; disconnect the water outlet pipe of the
heater from the air conditioner pipe.
8. Release the nut and remove the accelerator control cable. -