2009 CHERY TIGGO immobilizer

Downloaded from www.Manualslib.com manuals search engine 8.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0122 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–315Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK THE TPS POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check supply voltage between TPS terminal 3 and
ground in the TPS electrical connector E-027.
• 5 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for a short to power in har-
ness or connectors.
If harness is normal, replace the ECM.
NOTE : The Immobilizer control module
must be matched to the new ECM
(See ECM Removal & Installation in Section 03 Electronic Engine Controls).
4.CHECK TPS SIGNAL CIRCUIT FOR A SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness for short to power.
Is the check result normal?
Ye s>>Go to step 6.
No
>>Go to the next step.
5.CHECK THE TPS GROUND CIRCUIT FOR AN OPEN OR SHORT
• Check harness continuity between following terminals.
TPS TERMINAL ECM TERMINAL
27 8
• Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair open circuit or short to power in harness or connectors.
DIAGNOSIS & TESTING
LTSMD030035
03
03–319Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 8.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0123 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–321Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine •Continuity should exist.
• Check harness short to power supply circuit.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace circuit for an open or short to power in harness or connectors.
5.CHECK O2SENSOR
• Connect O
2sensor connector.
• Connect ECM connector.
• If with the X-431, refer to data stream value.
• If without the X-431, as following procedure:
Start engine and warm it up to normal operating temperature 350°C.
Turn ignition switch off.
Start engine and keep the engine speed between 3,500 and 4,000 RPM for at least 1 minute.
Let engine idle for 1 minute.
Set digital multimeter probes between ECM terminal 4 and ground.
CHECKITEM CHECK CONTENT NORMAL
VALUE
Oxygensensor •
Warm-up
condition
• Become
lean while
decelerate Decelerate
from 4,000
RPM
suddenly Below 100
mV
• Warm-up
condition
• Become
rich while
accelerate Accelerate
suddenly Approximately
600 - 900 mV
• Warm-up
condition
• Check with
O
2sensor
signal Idle 100 - 900 mV
2500 RPM Approximately
600 - 900 mV
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace O2sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0132 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–325Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 12.CHECK INJECTOR RESISTANCE
• Disconnect injector harness connectors (See Fuel Pressure Test in Section 04 Fuel Delivery).
• Check the resistance of the injectors.
INJECTOR
NO. INJECTOR
TERMINAL RESISTANCE
(APPROXIMATELY) (20°C)
1 1&2
16
2 1&2
3 1&2
4
1&2
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
Go to step 14.
13.CHECK INJECTOR
• Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
• Remove fuel delivery rail with injectors (See Fuel Injector Rail Removal & Installation 1.6L/1.8L/2.0L in Section
04 Fuel Delivery).
NOTE :
Be careful not to drop the fuel injectors when removing the fuel delivery rail.
• Keep fuel hose and all injectors connected to injector rail.
• Disconnect all ignition coil harness connectors.
• Prepare pans or saucers under each injector.
• Crank engine for about 3 seconds.
• Fuel should be sprayed evenly for each injector.
Is the check result normal?
Ye s>>Go to next step.
No
>>Clean or replace the defective fuel injector.
14.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See DTC Confirmation Procedure.
Is DTC P0171 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–335Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
Go to step 14.
12.CHECK INJECTOR
WARNING!
Confirm that the engine is cooled down and there are no fire hazards near the vehicle.
• Remove fuel delivery rail with injectors (See Fuel Injector Rail Removal & Installation 1.6L/1.8L/2.0L in Section
04 Fuel Delivery).
NOTE :
Be careful not to drop the fuel injectors when removing the fuel delivery rail.
• Keep fuel hose and all injectors connected to injector rail.
• Disconnect all injector harness connectors.
• Disconnect all ignition coil harness connectors.
• Prepare pans or saucers under each injector.
• Crank engine for about 3 seconds.
• Make sure fuel does not drip from injector.
Is the check result normal?
Ye s>>Go to next step.
No
>>Replace any leaking injectors as necessary. Always replace the O-ring seal when replacing the fuel
injector .
13.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0172 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03–344Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace injector.
11 .CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• See DTC Confirmation Procedure.
Is DTC P0201, P0202, P0203 or P0204 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03
03–351Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 10.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0221 still present?
Ye s>>Replace the ECM.
NOTE : The Immobilizer control module must be matched to the new ECM (See ECM Removal & Instal-
lation in Section 03 Electronic Engine Controls).
No
>>The system is now operating properly.
Reassemble the vehicle and road test to verify the customers complaint is repaired.
DIAGNOSIS & TESTING
03–358Chery Automobile Co., Ltd.