immobilizer CHERY TIGGO 2009 Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine •Continuity should exist.
• Check harness for short to power.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to power in harness or connectors.
5.CHECK IAT SENSOR
• Connect IAT sensor connector.
• Connect ECM connector.
• Turn ignition switch on.
• Check signal between air flow sensor terminal 1 and ground under the following conditions:
TERMINAL NO. ITEM CONDITION DATA (DC
VOLTAGE)
42 IAT sensor Ignition switch on IAT: 36°C Approximately 1.88
V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace IAT sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0113 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
03–300Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR ELECTRICAL CONNECTOR
• Disconnect the ECT sensor 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 ENGINE COOLANT TEMPERATURE (ECT) SENSOR SIGNAL CIRCUIT FOR A SHORT
• Turn ignition switch on.
• Check reference voltage between ECT sensor ter-
minal 2 and ground in the sensor electrical connec-
tor E-019.
• 4.5 - 4.9 V should exist.
Is the check result normal?
Ye s>>Go to step 5.
No
>>Go to the next step.
4.DETECT MALFUNCTIONING PART
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness for a short to ground between ECT sensor connector terminal 2 and ECM connector E-001, ter-
minal 39.
Is the check result normal?
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
>>Repair or replace circuit for a short in harness or connectors.
DIAGNOSIS & TESTING
BESM030019
LTSMD030032
03
03–303Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 5.CHECK ECT SENSOR
• Check resistance between ECT sensor terminal 1 and 2.
ECT°C RESISTANCE K
10°C 8.62 - 10.28
20°C 2.37 - 2.63
80°C 0.299 - 0.345
• Connect ECT sensor connector.
• Connect ECM connector.
• Turn ignition switch on.
• Check sensor output signal.
TERMINAL NO. ITEM CONDITION DATA (DC
VOLTAGE)
39 ECT sensor
Ignition switch on ECT: 59°C
Approximately
1.89 V
ECT: 78°C Approximately
1.25 V
ECT: 90°C Approximately
0.94 V
17 Sensor (GND) -Approximately 0 V
Is the check result normal?
Ye s>>Go to the next step.
No
>>Replace ECT sensor.
6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0117 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
03–304Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 2.CHECK ENGINE COOLANT TEMPERATURE (ECT) SENSOR ELECTRICAL CONNECTOR
• Disconnect the ECT sensor 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 THE ECT SENSOR SIGNAL CIRCUIT FOR A SHORT
• Turn ignition switch on.
• Check ECT sensor reference voltage between sen-
sor terminal 2 and ground in the sensor electrical
connector E-019.
• 4.5 - 4.9 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace harness for an open or
short to power between ECT connector
terminal 2 and ECM connector E-001, ter-
minal 39.
If harness is normal, 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).
4.CHECK ECT SENSOR GROUND CIRCUIT FOR AN OPEN AND SHORT
• Turn ignition switch off.
• Check harness continuity between following terminals.
ECT SENSOR
TERMINAL ECM
TERMINAL CONTINUITY
11
7Yes
DIAGNOSIS & TESTING
BESM030019
LTSMD030032
03
03–307Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 6.CHECK DTC
• With the X-431 scan tool, read ECM DTCs.
• Refer to DTC Confirmation Procedure.
Is DTC P0118 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
03–309Chery Automobile Co., Ltd.

Downloaded from www.Manualslib.com manuals search engine 3.CHECK THE TPS POWER SUPPLY CIRCUIT
• Turn ignition switch on.
• Check throttle position sensor supply voltage
between sensor terminal 3 and ground in the sen-
sor electrical connector E-027.
• 5.0 V should exist.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair circuit for an open or short to
ground in harness 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 AN OPEN OR SHORT
• Turn ignition switch off.
• Disconnect ECM harness connector.
• Check harness continuity between following terminals.
TPS TERMINAL ECM TERMINAL
65 4
53 8
• Continuity should exist.
• Check harness for a short to power.
Is the check result normal?
Ye s>>Go to step 6.
No
>>Go to the next step.
5.DETECT MALFUNCTIONING PART
• Check harness for an open or a short to ground between TPS connector terminal 2 and ECM connector E-001,
terminal 78.
Is the check result normal?
Ye s>>Go to the next step.
No
>>Repair or replace harness or connectors.
DIAGNOSIS & TESTING
LTSMD030035
03
03–313Chery 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 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.