2009 CHERY TIGGO check engine

Downloaded from www.Manualslib.com manuals search engine CONDITIONPOSSIBLE CAUSES CORRECTION
Normal Pressures, But A/C
Performance Test Air Temperatures
At Center Panel Outlet Are Too High · Excessive refrigerant oil in system.
· Blend door inoperative or sealing
improperly.
· Blend door actuator faulty or
inoperative.· Recover the refrigerant from the
refrigerant system and inspect the
refrigerant oil content. Restore the
refrigerant oil to the proper level, if
required.
· Inspect the blend door for proper
operation and sealing. Repair if
required.
· Replace if faulty.
The Low Side Pressure Is Normal
Or Slightly Low, And The High Side
Pressure Is Too Low · Low refrigerant system charge.
· Refrigerant flow through the
accumulator is restricted.
· Refrigerant flow through the
evaporator is restricted.
· Faulty compressor.· Test the refrigerant system for
leaks. Repair, evacuate and charge
the refrigerant system, if required.
· Replace the restricted accumulator,
if required.
· Replace the restricted evaporator
coil, if required.
· Replace the compressor, if
required.
The Low Side Pressure Is Normal
Or Slightly High, And The High Side
Pressure Is Too High · Condenser air flow restricted.
· Inoperative cooling fan.
· Refrigerant system overcharged.
· Air in the refrigerant system.
· Engine overheating.· Check the condenser for damaged
fins, foreign objects obstructing air
flow through the condenser fins, and
missing or improperly installed air
seals. Clean, repair, or replace
components as required.
· Test the cooling fan and replace, if
required.
· Recover the refrigerant from the
refrigerant system. Charge the
refrigerant system to the proper
level, if required.
· Test the refrigerant system for
leaks. Repair, evacuate and charge
the refrigerant system, if required.
· Test the cooling system and repair
as necessary.
The Low Side Pressure Is Too High,
And The High Side Pressure Is Too
Low · Accessory drive belt slipping.
· Faulty compressor.· Inspect the accessory drive belt
condition and tension. Tighten or
replace the accessory drive belt, if
required.
· Replace the compressor, if
required.
The Low Side Pressure Is Too Low,
And The High Side Pressure Is Too
High · Restricted refrigerant flow through
the refrigerant lines.
· Restricted refrigerant flow through
the A/C accumulator.
· Restricted refrigerant flow through
the condenser.
· Faulty A/C expansion valve.· Inspect the refrigerant lines for
kinks, tight bends or improper
routing. Correct the routing or
replace the refrigerant line, if
required.
· Replace the accumulator if
restricted.
· Replace the restricted condenser, if
required.
· Test A/C expansion valve and
replace, if required.
DIAGNOSIS & TESTING
13
13–13Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Heater Performance
Engine coolant is delivered to the heater core through heater hoses. With the engine idling at normal operating tem-
perature, set the temperature control knob in the full hot position, the mode control switch knob in the floor heat
position, and the blower motor switch knob in the highest speed position. Using a test thermometer, check the tem-
perature of the air being discharged at the HVAC housing floor outlets. Compare the test thermometer reading to the
heater performance chart.
HEATER PERFORMANCE
Ambient Air
Temperature 15.5°C (60°F) 21.1°C (70°F) 26.6°C (80°F) 32.2°C (90°F)
Minimum Air
Temperature at Floor
Outlet 62.2°C (144°F) 63.8°C (147°F) 65.5°C (150°F) 67.2°C (153°F)
Both of the heater hoses should be hot to the touch. The coolant return heater hose should be slightly cooler than
the coolant supply heater hose. If the return hose is much cooler than the supply hose, locate and repair the engine
coolant flow obstruction in the cooling system.
Obstructed Coolant Flow
Possible locations or causes of obstructed coolant flow:
• Pinched or kinked heater hoses.
• Improper heater hose routing.
• Plugged heater hoses or supply and return ports at the cooling system connections.
• A plugged heater core.
Mechanical Problems
Possible locations or causes of insufficient heat:
•An obstructed cowl air intake.
• Obstructed heater system outlets.
• A blend door not functioning properly.
• Trapped air in system.
Temperature Control
If the heater outlet air temperature cannot be adjusted with the temperature control knob(s) on the A/C heater control
panel, the following could require service:
•The A/C heater control panel.
• The blend door.
• The blend door cable.
• Improper engine coolant temperature.
DIAGNOSIS & TESTING
13–14Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Blower Motor Electrical Troubleshooting
To determine if an open condition exists within the blower motor circuit wiring, it is necessary to disconnect the neg-
ative battery cable and check for continuity within the blower motor circuits using an ohmmeter.
Possible causes of an inoperative blower motor include the following:
•Open fuse
• Inoperative blower motor switch
• Inoperative blower motor resistor
• Inoperative blower motor
• Inoperative blower motor circuit wiring or wiring harness electrical connectors
Blower Motor Noise
To determine if the blower motor is the source of the noise, simply switch the blower motor from Off to On. To verify
that the blower motor is the source of the noise, unplug the blower motor wire harness connector and operate the
heater-A/C system. If the noise goes away, possible causes include:
•Foreign material on fresh air inlet screen
• Foreign material in blower wheel
• Foreign material in HVAC housing
• Incorrect blower motor mounting
• Deformed or damaged blower wheel
• Worn blower motor bearings or brushes
Blower Motor Vibration
Possible causes of a blower motor vibration include:
•Incorrect blower motor mounting
• Foreign material in blower wheel
• Deformed or damaged blower wheel
• Worn blower motor bearings
13–28Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Mechanical Problems
Possible locations or causes of insufficient heat:
•An obstructed cowl air intake.
• Obstructed heater system outlets.
• A blend door not functioning properly.
• Trapped air in system.
Temperature Control
If the heater outlet air temperature cannot be adjusted with the temperature control knob(s) on the A/C heater control
panel, the following could require service:
•The A/C heater control.
• The blend door actuator(s).
• The wire harness circuits for the A/C heater control or the blend door actuator(s).
• The blend door(s).
• Improper engine coolant temperature.
A/C Compressor Noise Testing
When investigating an A/C system related noise, you must first know the conditions under which the noise occurs.
These conditions include: weather, vehicle speed, transaxle in gear or neutral, engine speed, engine temperature,
and any other special conditions. Noises that develop during A/C operation can often be misleading. For example:
what sounds like a failed bearing, may be caused by loose bolts, nuts, mounting brackets or a loose compressor
assembly.
NOTE :
The A/C compressor must be replaced if any unusual noise is heard from the compressor itself.
NOTE :
Drive belts are speed sensitive. At different engine speeds and depending upon drive belt tension, drive belts can
develop noises that are mistaken for an A/C compressor noise. Improper drive belt tension can cause a misleading
noise when the compressor is operating at maximum displacement, which may not occur when the compressor is at
minimum displacement.
1. Select a quiet area for testing.
2. Duplicate the complaint conditions as much as possible.
3. Turn the A/C system On and Off several times to clearly identify any compressor noise.
4. Listen to the A/C compressor while it is operating at maximum and minimum displacement.
5. Probe the A/C compressor with an engine stethoscope or a long screwdriver with the handle held to your ear to better localize the source of the noise.
6. To duplicate high-ambient temperature conditions (high head pressure), restrict the air flow through the A/C con- denser. Install a manifold gauge set or a scan tool to ensure that the discharge pressure does not exceed 2600
kPa.
7. Check the condition of the accessory drive belt. NOTE: The A/C compressor must be replaced if the drive hub is broken or if the compressor shaft does not
rotate smoothly.
8. Check the compressor hub and pulley and bearing assembly. Ensure that the hub and pulley are properly aligned and that the pulley bearing is mounted securely to the A/C compressor.
9. Check the refrigerant system plumbing for incorrect routing, rubbing or interference, which can cause unusual noises. Also check the refrigerant lines and hoses for kinks or sharp bends that will restrict refrigerant flow, which
can cause noises.
10. Loosen all of the compressor mounting hardware and retighten. CAUTION: Do not run the engine with a vacuum pump in operation or with a vacuum present within the
A/C system. Failure to follow this caution will result in serious A/C compressor damage.
11. If the noise is from opening and closing the high pressure relief valve, recover, evacuate and recharge the refrig- erant system. If the high pressure relief valve still does not seat properly, replace the A/C compressor.
13
13–35Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 12. If the noise is from liquid refrigerant slugging in the A/C suction line, replace the A/C accumulator and check therefrigerant oil level and the refrigerant system charge.
13. If a slugging condition still exists after replacing the A/C accumulator, replace the A/C compressor.
Refrigerant System Leaks
WARNING!
R-134a service equipment or vehicle A/C systems should not be pressure tested or leak tested with compressed
air. Mixture of air and R-134a can be combustible at elevated pressures. These mixtures are potentially danger-
ous and may result in fire or explosion causing property damage, personal injury or death. Avoid breathing A/C
refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose and throat. Use only approved service
equipment meeting SAE requirements to discharge an R-134a system. If accidental system discharge occurs,
ventilate work area before resuming service.
NOTE :
If the A/C refrigerant system charge is empty or low, a leak in the A/C system is likely. Inspect all A/C lines, fittings
and components for an oily residue. Oil residue can be an indicator of an A/C system leak location.
NOTE :
The only way to correctly determine if the refrigerant system is fully charged with R-134a is to completely evacuate
and recharge the A/C system.
Refrigerant System Empty
1. Evacuate the refrigerant system to the lowest degree of vacuum possible. Determine if the system holds a vac- uum for 15 minutes. If vacuum is held, a leak is probably not present. If system will not maintain vacuum level,
proceed to STEP 2.
2. Prepare and dispense 0.3 kilograms of R-134a refrigerant into the evacuated refrigerant system and proceed to STEP 1 of the System Low procedure.
Refrigerant System Low
1. Position the vehicle in a wind-free work area. This will aid in detecting small leaks.
2. Operate the heating-A/C system with the engine at idle under the following conditions for at least 5 minutes:Doors or windows open, transaxle in Park or Neutral with the parking brake set (depending on application), A/C-
Heater controls set to outside air, full cool, panel mode, high blower and with A/C compressor engaged.
3. Shut the vehicle Off and wait2-7minutes. Then use an electronic leak detector that is designed to detect R-134a refrigerant and search for leaks. Fittings, lines or components that appear to be oily usually indicate a
refrigerant leak. To inspect the A/C evaporator for leaks, insert the leak detector probe into the drain tube open-
ing or an air outlet. A dye for R-134a is available to aid in leak detection. Use only approved refrigerant dye.
CAUTION:
A leak detector only designed for R-12 refrigerant will not detect leaks in an R-134a refrigerant sys-
tem.
DIAGNOSIS & TESTING
13–36Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine DIAGNOSIS & TESTING
Diagnostic Help
1. The X-431 scan tool connects to the Data Link Connector (DLC) and communicates with the vehicle electronicmodules through the data network.
2. Confirm that the malfunction is current and carry-out the diagnostic tests and repair procedures.
3. If the DTC cannot be deleted, it is a current fault.
4. Use a digital multimeter to perform voltage readings on electronic systems.
5. Refer to any Technical Bulletins that may apply to the failure.
6. Visually inspect the related wiring harness.
7. Inspect and clean all Restraints Control Module (RCM) grounds that are related to DTC.
8. If numerous trouble codes were set, use a wiring schematic and look for any common ground circuits or voltage supply circuits that may apply to the DTC.
Intermittent DTC Troubleshooting
If the failure is intermittent perform the following:
•Check for loose connectors.
• Look for any chafed, pierced, pinched, or partially broken wires.
• Monitor the scan tool data relative to this circuit.
• Wiggle the related wiring harness and connectors while looking for an interrupted signal on the affected circuit.
• If possible, try to duplicate the conditions under which the DTC set.
• Look for the data to change or for the DTC to reset during the wiggle test.
• Look for broken, bent, pushed out or corroded terminals.
• Inspect the sensor and mounting area for any condition that would result in an incorrect signal, such as dam-
age, foreign material.
• A data recorder, and/or oscilloscope should be used to help diagnose intermittent conditions.
• Remove the Restraints Control Module (RCM) from the troubled vehicle and install in a new vehicle and test. If
the DTC cannot be deleted, the RCM is malfunctioning. If the DTC can be deleted, return the RCM to the origi-
nal vehicle.
Ground Inspection
Ground connections are very important to the proper operation of electrical and electronic circuits. Ground connec-
tions are often exposed to moisture, dirt and other corrosive elements. The corrosion (rust) can become an unwanted
resistance. This added resistance can alter the way a circuit works.
Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drastically
affect an electronically controlled circuit. A poor or corroded ground can affect the circuit. Perform the following when
inspecting a ground connection:
1. Remove the ground bolt or screw.
2. Inspect all mating surface for tarnish, dirt, rust, etc.
3. Clean as required to assure good contact.
4. Reinstall bolt or screw securely.
5. Inspect for add-onaccessories which may be interfering with the ground circuit.
6. If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are crimped to one eyelet, make
sure no excess wire insulation has been crimped creating a bad ground.
Diagnostic Tools
Diagnostic Scan Tool X-431
Read the following when connecting the X-431 scan tool:
•Connect the scan tool to the Data Link Connector (DLC) for communication with the vehicle.
• The DLC is located on the driver side compartment under the steering column (it is attached to the instrument
panel and accessible from the driver seat).
• The DLC is rectangular in design and capable of accommodating up to 16 terminals.
• The electrical connector has keying features to allow easy connection.
14–8Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine NOTE :
The Restraints Control Module (RCM) ground pin must be connected to the vehicle chassis in the immediate location
of the RCM mounting area.
On Board Diagnostic Logic
•Self-diagnosis detection logic.
DTC NO. DTC DEFINITION DTC DETECTION
CONDITION DTC SET
CONDITION POSSIBLE CAUSE
B1102 Battery Voltage Low Ignition switch: ON Restraints Control
Module (RCM)
detected that the
battery voltage is
excessively low.•
Battery
• Charge system
• Harness is open or
shorted
• RCM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the latest software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the RCM.
• Turn ignition switch off and wait for a few seconds.
• Turn ignition switch on then select view DTC.
• If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 14 Restraints for more information).
Diagnostic Guide Lines
Observe the following guide lines while diagnosing this DTC:
•Troubleshoot any Engine Control Module (ECM) charging/cranking DTCs before proceeding.
• If the warning lamp goes out immediately after the warning lamp flashed for6-7seconds, this indicates that
the system is OK.
• If the warning lamp is on for6-7seconds continuously, then goes out, or the warning lamp is on continuously,
this indicates that there are history DTCs in the system. Use the Scan Tool to erase the DTCs.
• If any other condition occurs, use the Scan Tool to erase the history DTCs first, then check the warning lamp.
If the warning lamp does not go out immediately after the warning lamp flashes for6-7seconds when using
the Scan Tool, erase the history DTCs first.
• In the course of troubleshooting the airbag system, make sure the system power supply is shut off, and wait
two minutes for the system capacitor to discharge.
• The squib circuit connectors integrate a shortingspring (which prevents the airbag from deploying unintention-
ally due to static electricity by shorting the positive wire to the negative wire in the squib circuit when the con-
nectors are disconnected). Therefore, if the airbag electrical connector or spiral cable electrical connector is
damaged or improperly connected, the shorting spring may not be released when the electrical connector is
connected.
• The following tools are required to perform the DTC diagnostic procedure:
X-431 Scan Tool
Airbag Special Load Tool
Digital Multimeter
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
DIAGNOSIS & TESTING
14
14–13Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Diagnostic Procedure
1.CHECK GROUND CONNECTION
• Turn ignition switch off.
• Disconnect the negative battery cable.
• Loosen and retighten ground screws on the body (See Ground Inspection in Section 14 Restraints for more
information).
• Inspect the ground connection C-201 mounting position (See Vehicle Wiring Harness Layout - Main Harness in
Section 16 Wiring).
Is the ground connection OK?
Ye s>>Go to the next step.
No
>>Repair or replace ground connection.
2.CHECK RESTRAINTS CONTROL MODULE (RCM) ELECTRICAL CONNECTOR
• Disconnect the Restraints Control Module (RCM)
electrical connector (1).
• Inspect the electrical connector for damage.
Is the electrical connector OK?
Ye s>>Go to the next step.
No
>>Repair or replace the electrical connector
as necessary.
3.CHECK RESTRAINTS CONTROL MODULE (RCM) POWER SUPPLY
• Turn ignition switch on.
• Check RCM power supply between terminal 5 and
terminal 6 in the RCM electrical connector J-001
terminal side.
Is the voltage less than 9 V?
Ye s>>Go to step 4.
No
>>Replace the RCM.
DIAGNOSIS & TESTING
LTSM140006
LTSMD140001
14–14Chery Automobile Co., Ltd.